BEVERAGE PRODUCTS HAVING SUPERIOR VITAMIN STABILITY

Abstract: Disclosed are beverage products with improved vitamin stability. The beverage products include an effective amount of a aminpolycarboxylic acid as well as an effective amount of a polyphosphate, and can be enriched with one or more vitamins or other nutrients. In one embodiment, the beverage products include added water, fruit juice, ascorbic acid, ethylene tetra-acetic acid (EDTA), sodium hexametaphosphate, and potassium sorbate. The beverage can be packaged in relatively inexpensive HDPE-type containers which are generally oxygen permeable, and do not require the use of special oxygen barrier packaging to preserve the vitamins and flavor oils from oxidation.

Description: BEVERAGE PRODUCTS HAVING SUPERIOR VITAMIN STABILITY FIELD OF THE INVENTION The present invention relates to beverage products, such as carbonated and noncarbonated beverage products containing fruit juice and having supenor vitamin and flavor stability BACKGROUND OF THE INVENTION Controlling vitamin and flavor stability of dilute juice beverages is an ongoing concern among beverage manufacturers It is important that beverages maintain their intended flavor charactenstics and nutπtional charactenstics, even after prolonged penods of shelf storage One source of flavor degradation is microbial growth Another source of flavor degradation is oxidation of certam unsaturated compounds Additionally, oxidation can also be a cause of degradation of vitamin compounds For instance, certain water soluble vitamins, oil soluble vitamins, flavor oils, and flavor essences can be degraded by oxidation if dissolved oxygen is present in the beverage container Microbial degradation can result from accidental inoculation of the beverage products during manufacturing or packagmg Food spoilage microorganisms can then rapidly proliferate by feeding on nutnents provided by the fruit juice component of the noncarbonated dilute juice beverages Flavor degradation and vitamin degradation due to oxidation can occur when dissolved oxygen and a catalyst, such as metal ions, are present m the packaged beverage, or when the beverage package is relatively oxygen permeable, such as m the case of relatively mexpensive plastic packagmg, such as high density polyethylene (HDPE) packages Such plastic containers can provide a relatively poor barner to oxygen, when compared to containers made of glass or metal Oxygen passmg through the container can cause oxidation of beverage ingredients which include water and oil soluble components, mcludmg vitamins and flavor components including flavor oils This oxidation can result m the loss of vitamin content and the formation of undesirable flavors and/or odors Microbial stability in dilute beverage products can be provided to some extent by heat pasteurizing during packagmg (hot packing) or by packagmg under completely aseptic conditions (aseptic packagmg) Special packagmg constructions for providing a barner between oxygen m the atmosphere and the beverage can also be used to reduce the amount of oxygen that enters the beverage over time However, such processing or packagmg methods are generally undesirable from a cost and complexity standpomt Also, flexible containers made from polymenc matenals, such as high density polyethylene, which have become more popular with consumers, should not be subjected to the pasteurization temperatures utilized during hot packing operations U S Patent 5,431,940 to Calderas et al discloses a beverage contammg a polyphosphate and a preservative for beverage products that are to be stored at ambient temperatures for at least about 10 days without substantial microbial proliferation One disadvantage associated with the polyphosphate disclosed m TJ S Patent 5,431,940 is that, over tune, the effectiveness of the polyphosphate as a chelatmg agent may be reduced Without bemg limited by theory, it is believed that the cham length of the polyphosphate can be reduced over time, such as by hydrolysis SUMMARY OF THE INVENTION Accordingly, Applicants have found that it would be desirable to provide a beverage product which has the antimicrobial effectiveness of a polyphosphate and preservative combination, yet maintains chelation activity m the beverage for a substantially longer penod of time than is provided by polyphosphates Applicants have discovered that dilute juice beverages fortified with vitamins can lose at least some vitamin content to oxidation, despite the use of a polyphosphate and preservative combination Without bemg limited by theory, it is believed that trace metal ions in the beverage can be a food source for microbes, and can also serve as a catalyst for oxidation of compounds such as vitamins and flavor oils Accordmg to one embodiment of the present mvention, a beverage composition is provided having a first chelatmg agent, which can compnse an aminopolycarboxylic acid, such as ethylene diamine tetra-acetic acid (EDTA), and a second chelatmg agent, which can comprise a polyphosphate The first chelatmg agent provides chelatmg properties over an extended length of time as compared to the second chelatmg agent, and is present in quantities effective to reduce the rate of oxidation of vitamins and flavor oils The second chelatmg agent provides chelatmg properties over a relatively shorter penod of time as compared to the first chelatmg agent The second chelatmg agent can have a rate of degradation by hydrolysis which is greater than that of the first chelatmg agent The second chelatmg agent, m combination with a preservative, is present m quantities effective to kill microbes which may be present durmg the initial packagmg of the beverage The presence of second chelatmg agent is effective m reducmg microbial activity durmg the early portion of the beverage's shelf life, while the first chelatmg agent provides sustamed chelatmg activity to preserve vitamins and flavor compounds in the beverage over longer periods of time Accordmg to one embodiment of the present mvention, a noncarbonated, vitamin enriched beverage composition comprises added water, ascorbic acid, flavor oils, between about 20 and about 30 ppm of EDTA, a preservative such as potassium sorbate, and about 300 to about 3000 ppm of a polyphosphate havmg the formula: where n averages from about 17 to about 60 DETAILED DESCRIPTION OF THE INVENTION As used herem, "microbial proliferation" means a 100 fold mcrease or greater m the number of beverage spoilage microorganisms m a noncarbonated beverage product after an initial contamination level of about 10 cfu/ml Beverage products described as "microbially stable" exhibit less than a 100 fold mcrease in the level of microorganisms when stored at 73°F for at least 28 days, following an initial contamination level of 10 cfu/ml of spoilage microorganisms Beverages descnbed as "microbially unstable" exhibit more than a 100 fold mcrease m the level of microorganisms when stored at 73°F for 28 days, following an initial contamination level of 10 cfu/ml of spoilage microorganisms As used herem, the term "noncarbonated beverage products" refers to beverage products having less than 1 volume of carbonation As used herem, the term "comprising" means various components can be conjointly employed in the preparation of the noncarbonated beverage products of the present mvention As used herein "lipid soluble" refers to the portion of plant or animal tissue which dissolves when the plant or animal tissue is extracted with a nonpolar solvent (e g ether, chloroform, benzene, or an alkane) Lipid soluble components include carboxyhc acids (or fatty acids), glyceryl trialkanoates (or neutral fats), phosphohpids, glycohpids, waxes, terpenes, steroids, and prostaglandms All weights, parts and percentages used herem are based on weight unless otherwise specified U.S Patent 5,431,940 to Calderas et al. and U S. Patent Application Seπal Number 08/892,674 filed July 14, 1997 m the names of Smith et al. are incorporated herein by reference The beverage compositions of the present mvention compnse a first chelatmg agent and a second chelatmg agent The first chelatmg agent can comprise an aminopolycarboxylic acid, such as ethylene diaπune tetra-acetic acid (EDTA) The second chelatmg agent can comprise a food grade polyphosphate, such as sodium hexametaphoshpate The first chelatmg agent provides chelatmg properties over an extended length of time as compared to the second chelatmg agent, and is present m quantities effective to prevent the oxidation of vitamms and flavor oils The second chelatmg agent provides chelatmg properties over a relatively shorter period of time as compared to the first chelatmg agent The second chelatmg agent can have a rate of degradation by hydrolysis which is greater than that of the first chelatmg agent The second chelatmg agent, m combmation with a preservative, is present m quantities effective to kill microbes which may be present durmg the initial packagmg of the beverage The presence of second chelatmg agent is effective m reducmg microbial activity durmg the early portion of the beverage's shelf life, while the first chelatmg agent provides sustamed chelatmg activity to preserve vitamms and flavor compounds m the beverage over longer periods of time Accordmg to one embodiment of the present mvention, a noncarbonated, vitamin enriched beverage composition compnses added water, one or more water or oil soluble vitamms, flavor components such as flavor oils, calcium disodium EDTA, sodium hexametaphosphate, and a preservative such as potassium sorbate In one particular embodiment, a noncarbonated, vitamin enriched juice beverage accordmg to the present mvention comprises at least about 80% added water, between about 1% and about 20% fruit juice, sufficient ascorbic acid to provide at least 50%, more particularly at least about 100%, still more particularly at least about 150% of the of the USRDI (U S Recommended Daily Intake) of vitamin C per eight fluid ounce servmg, between about 2 ppm and about 30 ppm calcium disodium EDTA, between about 100 ppm and about 400 ppm potassium sorbate, and about 100 to about 3000 ppm of a polyphosphate such as sodium hexametaphosphate By way of example, for the beverage compositions described herem, 50% of the USRDI for Vitamin C, per eight fluid ounce servmg, is equivalent to about 30 milligrams per eight fluid ounce servmg Dependmg upon the initial amount of ascorbic acid m the beverage as packaged, and the oxygen permeability of the beverage package, the combmation of the EDTA and the polyphosphate can provide a beverage composition which mamtams a desired level of vitamin C for shelf storage periods m excess of four months First Chelating Agent: The first chelatmg agent can comprise an aminopolycarboxylic acid The beverages of the present mvention can comprise at least about 1 ppm, more particularly at least 2 ppm, still more particularly at least about 5 ppm, still more particularly at least about 10 ppm, and still more particularly between about 20 ppm and about 30 ppm of an aminopolycarboxylic acid In one embodiment, the beverages of the present mvention compnse between about 20 ppm and about 30 ppm of calcium disodium EDTA Suitable USP edetate calcium disodium/food grade EDTA is available m powder form under the name VERSENE from the Dow Chemical Company The Fruit Juice Component The beverage products of the present mvention can contam fruit juice, which can provide flavor and nutation Beverage products of the present mvention can comprise at least about 0 1% by weight, and more particularly from 0 1% to about 40% by weight fruit juice In one embodiment, the beverage composition mcludes from about 0 1% to about 20%, more particularly from about 1% to about 20%, still more particularly from about 1% to about 10%, and still more particularly from about 1% to about 6% by weight of one or more fruit juices (weight percentage based on single strength 2-16° Bnx fruit juice) The fruit juice can be incorporated into the beverage product as a puree, comminute or as a smgle strength or concentrated juice Suitable juices mclude any citrus juice, non-citrus juice, or mixture thereof, which are known for use m beverage products Examples of such fruit juices mclude, but are not limited to, non-citrus juices such as apple juice, grape juice, pear juice, nectarine juice, currant juice, raspberry juice, gooseberry juice, blackberry juice, blueberry juice, strawberry juice, custard-apple juice, pomegranate juice, guava juice, kiwi juice, mango juice, papaya juice, watermelon juice, cantaloupe juice, cherry juice, cranberry juice, peach juice, apricot juice, plum juice and mixtures thereof, and citrus juices such as orange juice, lemon juice, lime juice, grapefruit juice, tangerine juice and mixtures thereof Other fruit juices (e g pmeapple), and nonfruit juices such as vegetable or botanical juices, can be used with the fruit juice component of the noncarbonated beverage products of the present mvention Water Soluble Vitamins: The beverage products of the present invention can be fortified with one or more water soluble vitamins, mcludmg but not limited to vitamins C and Bl The beverage product can be fortified with an amount of ascorbic acid sufficient to provide at least about 50%, more particularly at least about 100%, still more particularly at least about 150% of the USRDI requirement for Vitamin C per eight fluid ounce servmg The beverage products can also be fortified with at least about 10% of the USRDI requirement for Vitamin Bl per eight fluid ounce servmg Lipid Soluble Component: The beverage products of the present invention can mclude a lipid soluble component comprising unsaturated organic compounds Such unsaturated organic compounds include, but are not limited to, mono-, di-, and tnglycerides mcorporatmg fatty acids with one or more double bonds, and unsaturated terpenes such as limonene, alpha-pmene, citral, citronellal, and p-cymene. Such unsaturated organic compounds can be components of beverage mgredients, mcludmg but not limited to unsaturated oils such as vegetable oils (e.g. cottonseed oil), weighting oils, flavor oils, essence oils, and flavor components of fruit pulp. The beverages of the present mvention can also be fortified with at least 10%, more particularly at least 25%o, and still more particularly at least about 50% of the USRDI of one or more oil soluble vitamms per eight fluid ounces, mcludmg but not limited to Vitamm A, such as m the form of beta carotene By way of example, the beverages of the present mvention can mclude at least about 10% of the USRDI of Vitamin A per eight fluid ounces, corresponding to about 500 IU of vitamm A per eight fluid ounces The Added Water Component The beverages herem can also compnse an added water component For purposes of definmg the beverage products herem, the added water component does not mclude water incidentally added to the beverage product via other added matenals such as, for example, the fruit juice component. The beverage products of the present mvention typically compnse at least about 50%> by weight of added water, more typically from about 80% to about 99% by weight of water, and still more typically from about 80% to about 95 % by weight of water. The term "hardness" as used herem refers to the presence of calcium and magnesium cations m water, generally For purposes of the present mvention, hardness of the added water component is calculated accordmg to Association of Official Analytical Chemists (AOAC) standards set forth in Official Methods of Analysis, published by the AOAC, Arlmgton, Virginia, pp. 627-628 (14th ed. 1984), which is mcorporated herem by reference. Under AOAC standards, hardness is the sum of CaCO β equivalents (mg/L) in water, which sum is obtamed by multiplying the concentrations (mg/L) found of the following cations m the water by the factors Table 1 Compounds that impart hardness to water are primarily magnesium and calcium carbonates, bicarbonates, sulfates, chlorides and nitrates, although other compounds which can contribute polyvalent cations to water can also impart hardness Water based on hardness is normally classified as soft (0-60 ppm), moderately hard (61-120 ppm), hard (121-180 ppm) and very hard (over 180 ppm) Preferably, the hardness of the added water component ranges from 0 to about 220 ppm In one embodiment, the water hardness can range from 0 to about 180 ppm, more particularly from about 0 to about 60 ppm, and still more particularly from about 0 to about 30 ppm The added water can have an alkalmity of less than about 300 ppm The term "alkalmity" as used herem refers to the presence of carbonate and bicarbonate anions m water, generally For purposes of the present mvention, alkalmity of the added water component is measured accordmg to AOAC standards set forth m Official Methods of Analysis, published by the AOAC, Arlmgton, Virginia, pp 618-619 (14th ed 1984), which is mcorporated herem by reference The standard AOAC Titnmetric Method for measuring hardness can mvolve automatic titrators and pH meters, suitably calibrated, or visual titration Alkalmity is then calculated and expressed as CaCO (mg/L) equivalents m the added water component Compounds that impart alkalmity to water mclude carbonate, bicarbonate, phosphate, hydroxide and silicate salts of potassium, sodium, calcium and magnesium For purposes of defining the beverage products herem, the added water component does not mclude water mcidentally added to the beverage product via other added materials such as, for example, the fruit juice component The Preservative System including Second Chelating Agent The beverage products of the present mvention preferably comprise a preservative system containing a preservative and the second chelatmg agent compnsmg a food grade polyphosphate A The Preservative The beverage products herem comprise from about 100 ppm to about 1000 ppm, more particularly from about 200 ppm to about 500 ppm, and still more particularly from about 200 to about 400 ppm, of a preservative selected from the group consisting of sorbic acid, benzoic acid, alkali metal salts thereof, and mixtures thereof The preservative can be selected from the group consistmg of sorbic acid, potassium sorbate, sodium sorbate and mixtures thereof The use of sorbates, benzoates and mixtures thereof as preservatives m beverage products is well known, as is the mechanism by which such preservatives inhibit microbial growth in food products generally Sorbates and benzoates are described, for example, by Davidson and Branen, Antimicrobials in Foods. Marcel Dekker, Inc , pp 11-94 (2nd ed 1993), which description is mcorporated herem by reference The use of straight chain polyphosphates, alone or in combmation with preservatives, to inhibit microbial growth m food products is also well known Polyphosphates are descnbed, for example, in Handbook of Food Additives. CRC Press, pp 643-780 (2nd ed 1972), which descnption is incorporated herem by reference Moreover, the synergistic or additive antimicrobial effect from phosphates combmed with a preservative (e g , sorbates, benzoates, organic acids) in food products is disclosed in U S Patent 3,404,987 to Kooistra et al B The Food Grade Polyphosphate The beverage products can comprise from about 100 ppm to about 3000 ppm, more particularly from about 500 ppm to about 2500 ppm, still more particularly from about 900 to about 2000 ppm, and still more particularly from about 1200 ppm to about 1800 ppm, of a polyphosphate characterized by the following structure where n averages from about 3 to about 100 and each M is mdependently selected from the group of sodium and potassium atoms In one embodiment, the beverage composition compnses from about 1200 to about 1800 of a sodium polyphosphate havmg the formula where n averages from about 17 to about 60 More particularly, n can range from about 20 to about 30, and m one embodiment n averages about 21 Without bemg limited by theory, it is believed that straight cham polymeric phosphates can exhibit better antimicrobial activity m the noncarbonated beverage products of the present invention than other food grade phosphates Well-known food grade phosphates include, for example, orthophosphate, cyclic polyphosphates, monobasic calcium phosphate, dipotassmm phosphate, disodium phosphate, sodium phosphate, sodium pyrophosphate, sodium metaphosphate and tetrasodium pyrophosphate The polyphosphates for use m the noncarbonated beverage products herem and the selected preservatives also for use m the beverage product herem act synergistically, or at least additivity, to inhibit microbiological growth m the beverage products of the present mvention This combmation m the beverage products herem is particularly effective m inhibiting yeast, mcludmg preservative resistant Zygosaccharomyces batlii, and acid tolerant preservative resistant bactena It is believed that the particular straight cham polymenc sodium phosphates descnbed herem (e g , those havmg an average cham length rangmg from about 17 to about 60), can provide superior microbial stability to beverages containing them compared to straight cham polymeric phosphates havmg an average cham length of other than from about 17 to about 60, especially when the water hardness of the added water component of the beverages (heremafter descnbed) ranges from 61 ppm to about 220 ppm In particular, the noncarbonated beverages herem, which contam straight cham polymenc sodium phosphates havmg an average cham length rangmg from about 17 to about 30, can exhibit less than a 100 fold mcrease m the level of microorganisms when stored at 73°F for at least 28 days, after an initial contamination level of 10 cfu/ml of spoilage microorganisms Preferably, the beverages herein will exhibit less than a 100 fold mcrease m the level of microorganisms when stored at 73 °F for at least 60 days, more preferably at least 100 days, after an initial contamination level of 10 cfu/ml of spoilage microorganisms In general, the lower the water hardness of the added water, the longer the beverage will remam microbially stable It is believed that the improved microbial stability of the noncarbonated beverages herem which contam straight cham polymenc sodium phosphates havmg an average chain length of from about 17 to about 60 can be attributed to the particular characteristics of the straight cham polymenc sodium phosphates employed It is believed that, upon hydrolysis, straight cham polymeric sodium phosphates havmg an average cham length of from about 17 to about 60 break down to straight chain polymeric sodium phosphates that are still effective m providmg microbial stability to the beverages containing them for a penod of time, after which the EDTA can be effective m providing chelatmg action m the beverage By contrast, straight chain polymenc phosphates havmg an average cham length of less than about 21 will hydrolyze into straight cham polymenc phosphates which are not effective in providmg microbial stability to the beverages contammg them Straight chain polymeric phosphates havmg an average chain length of greater than about 60 are not necessanly soluble m the beverage products descnbed herein Another advantage of the straight cham polymenc sodium phosphates of the present mvention is that they can provide microbial stability to the beverages herem even when the added water component of the beverages comprises moderately hard to hard water Thus, there is frequently no need to soften the water before it is mcorporated mto the beverage Sweetener The noncarbonated beverage products of the present mvention can, and typically will, contam an artificial or natural, calonc or noncalonc, sweetener. Preferred are carbohydrate sweeteners, more preferably mono- and or di-sacchande sugars. Specifically, the noncarbonated beverage products will typically compnse from about 0.1% to about 20%, more preferably from about 6% to about 14%, sugar solids by weight of the beverage products. Suitable sweetener sugars mclude maltose, sucrose, glucose, fructose, invert sugars and mixtures thereof These sugars can be mcorporated mto the beverage products m solid or liquid form but are typically, and preferably, mcorporated as a syrup, more preferably as a concentrated syrup such as high fructose corn syrup For purposes of preparing the beverage products of the present mvention, these optional sweeteners can be provided to some extent by other components of the beverage products such as the fruit juice component, optional flavorants, and so forth. Preferred carbohydrate sweeteners for use m the beverage products are sucrose, fructose and mixtures thereof Fructose can be obtamed or provided as liquid fructose, high fructose corn syrup, dry fructose or fructose syrup, but is preferably provided as high fructose corn syrup. High fructose corn syrup (HFCS) is commercially available as HFCS-42, HFCS-55 and HFCS-90, which compnse 42%, 55% and 90%, respectively, by weight of the sugar solids therein as fructose Optional artificial or noncalonc sweeteners for use m the noncarbonated beverage product include, for example, saccharin, cyclamates, sucralose, acetosulfam, acesulfame-K, L-aspartyl-L-phenylalamne lower alkyl ester sweeteners (e.g., aspartame), L-aspartyl-D-alanine amides disclosed in U.S Patent 4,411,925 to Brennan et al., L-aspartyl-D-senne amides disclosed m U.S. Patent 4,399,163 to Brennan et al., L-aspartyl-L-1-hydroxymethyl-alkaneamιde sweeteners disclosed m U S. Patent 4,338,346 to Brand, L- aspartyl-1-hydroxyethylakaneamιde sweeteners disclosed m U.S. Patent 4,423,029 to Rizzi, L-aspartyl-D- phenylglycine ester and amide sweeteners disclosed m European Patent Application 168,112 to J M Janusz, published January 15, 1986, and the like. A particularly preferred sweetener is aspartame Other Ingredients The noncarbonated beverage products herem can further compnse any other mgredient or mgredients typically used as optional beverage mgredients Such optional mgredients mclude preservatives (e g., organic acids), colorants and so forth The noncarbonated beverage products can further compnse gums, emulsifiers and oils to affect texture and opacity Typical mgredients mclude guar gum, xanthan, algmates, mono- and di-glyceπdes, lecithin, carboxymethylcellulose(CMC), pectm, pulp, cottonseed oil, sunflower oil, vegetable oil, food starches and weightmg oils/agents. Esters and other flavor and essence oils can also be mcorporated mto the beverage products Acidity The noncarbonated beverage products of the present mvention have a pH of from about 2 5 to about 4.5, particularly from about 2.5 to about 3.5, more particularly from about 2.7 to about 3.3, and still more particularly from about 2.9 to about 3.1 Beverage acidity can be adjusted to and maintained within the requisite range by known and conventional methods, e.g., the use of food grade acid buffers Preparation The noncarbonated beverage products of the present mvention can be prepared by conventional methods for formulating noncarbonated dilute juice beverages. Such conventional methods can mvolve hot packing or aseptic packagmg operations, although such operations are not necessary for achieving the extended ambient display times descnbed herembefore. Methods for making dilute juice beverages, for example, are descnbed m U.S. Patent 4,737,375 to Nakel et al., which is mcorporated herem by reference. Methods for making beverage products are also descnbed by Woodroof and Phillips, Beverages: Carbonated & Noncarbonated. AVI Publishing Co (rev ed. 1981); and by Thorner and Herzberg, Non-alcoholic Food Service Beverage Handbook. AVI Publishing Co. (2nd ed 1978). One method for preparing the beverage products herem mvolves making a beverage base, addmg to it to a sugar syrup containing polyphosphate, and then trimming the mixture with water, sugar syrup, and beverage concentrate to obtam the requisite acidity and matenal composition In such a method, the beverage base can be prepared by admixing to water an acidulant (e g , citric acid), water soluble vitamms, lipid soluble vitamms, flavorants mcludmg juice concentrate, EDTA, and preservative. An oil m water emulsion, which provides opacity and texture to the beverage products, can be added to the base. The sugar syrup for use m preparmg the beverage products is separately prepared by addmg sugar syrup (e.g , high fructose corn syrup) to water, and then adding ascorbic acid, polyphosphate and thickening agents to the syrup. Additional preservative can be added to the resultmg sugar syrup. The sugar syrup and base are combmed to form a noncarbonated beverage product The noncarbonated beverage product can be trimmed with small amounts of added water, sugar syrup and beverage base to achieve the requisite acidity and composition of the noncarbonated beverage product of the present mvention. It can then be pasteurized, packaged and stored. Other well known and conventional vanations of the above described beverage formulation technique can, therefore, be used to prepare the noncarbonated beverage products herem Another method of preparmg the beverage compositions comprises forming a beverage base, followed by forming a beverage syrup, followed by forming a finished beverage product (smgle strength) by addmg water to the syrup TEST METHODS Test Method: Microbial Stability The term "microbial proliferation" as used herein means a 100 fold increase or greater in the number of beverage spoilage microorganisms in a noncarbonated beverage product after an initial inoculation level of about 10 cfu/ml. Beverage products described as "microbially stable" exhibit less than a 100 fold increase in the level of microorganisms when stored at 73°F for at least 28 days, following an initial contamination level of 10 cfu/ml of spoilage microorganisms. Beverages described as "microbially unstable" exhibit more than a 100 fold increase in the level of microorganisms when stored at 73°F for 28 days, following an initial contamination level of 10 cfu/ml of spoilage microorganisms. The microbial stability a noncarbonated beverage product can be determined by the following method. Beverage products are inoculated with mixed groups of preservative resistant yeast containing at least four separate yeast isolates, including Zygosaccharomyces bailii, and with mixed groups of preservative resistant, acid tolerant bacteria, including Acetobacter species. All yeast and bacteria utilized in the inoculation are previously isolated from preserved fruit juice beverages. Inoculated beverage products are maintained at 20°C for at least 60 days and aerobic plate cultures performed periodically. Aerobic plate counts of both yeast and bacteria populations are performed as described in the Compendium of Methods for the Microbiological Examinations of Foods, American Public Health Association, Washington, D.C. (edited by C. Vanderzant and D.F. Splittstoesser), which description is incorporated herein by reference. These plate counts are then used to identify the degree of microbial proliferation in the inoculated beverage product. Test Method: Average Chain Length of Sodium Polyphosphate Reagents and Equipment: Deuterium Oxide (D2O) NMR tubes 5 mm OD, Wilmad Glass, 507PP 10 mm OD, Wilmad Glass, 513-5PP NMR tube pressure caps 5 mm OD, Wilmad Glass, 521 10 mm OD, Wilmad Glass, 521-C Disposable transfer pipets Curtin Matheson, 355-123 Probe for AC-300 5 or 10 mm Pyrex wool Corning Glass Disposable wipers Kimberly-Clark, Kim- Wipes Spinner Turbine 5 mm, Bruker 10 mm, Bruker Spectrometer Bruker AC-300, equipped with 5 mm or 10 mm probe Procedure 1 Dissolve about 100 mg of sample in deutenum oxide (D2O) to prepare a solution havmg a concentration of about 12% by weight of sample Warm solution gently, if necessary, to aid m solute dissolution Filter the solution through compressed Pyrex wool, if necessary, to remove any solid particles 2 Transfer the solution to a clean NMR tube, usmg a disposable pipet 3 Place cap on NMR tube Wipe all smudges and dust particles off the NMR tube with a disposable wiper 4 Prepare a barcode label mcludmg user's initials, spectrometer, microprogram and sample solvent, and attach the label to the barcode label holder 5 Place the barcode label holder m the NMR tube with lettering up and place the spinner below the holder 6 Position the sample usmg the depth gauge 7 Place the sample tube/spinner/barcode holder assembly mto the appropriate chute on the spectometer sample changer 8 The spectrum will be automatically obtained, processed and plotted, based on the experiment and solvent information specified on the barcode label Spectrometer Parameters Microprogram PHG Sweep Frequency 121 39 MHz Sweep Width 50 KHz Spectrum Size 64 K Pulse Width 2 usec = 45° Pulse Recycle 10 0 sec Inverse gated broadband H-l decoupling The average cham length of the sodium polyphosphate is calculated as follows . / Integrated Peak Area I + Integrated Peak Area T \ Average chain length = 2( ) \ Integrated Peak Area T / Region T from -5 to -10 ppm contams peaks assigned to termmal phosphate units m lmear polyphosphates havmg a cham length of 2 or greater Region I from -18 to -24 ppm contams peaks assigned to internal phosphates Cyclic phosphates present as rmpunties m the samples also have peaks in Region I and are mcluded m the calculation The chemical shifts are referenced to external phosphonc acid EXAMPLE The following example provides an illustration of a beverage product of the present invention Sodium polyphosphate (sodium hexametaphosphate) is admixed under high sheer mixing to msure solubility The example is illustrative of the mvention and not mtended to be limiting of it A vitamm C fortified, noncarbonated juice contammg beverage havmg a pH of about 3 0 and 12 4 Bnx is formed by combmmg the following mgredients Added Water about 84% (hardness less than 30 ppm, alkalmity less than 300 ppm) High Fructose Corn Syrup HFCS-55 about 14 1% Fruit Juice Concentrate about 0 93% (to provide m a smgle strength beverage about 5 2% juice ) Citnc Acid about 0434% Potassium Sorbate about 300 ppm Sodium Hexametaphosphate (average cham length of about n = 21) about 1500 ppm Calcium Disodium EDTA about 25 ppm Ascorbic Acid about 463 ppm Sodium Citrate about 0 107% Flavor Oils about 0 053% CMC about 0 02% Xanthan about 0 02% Cloud about 0 173% (mcludmg sunflower oil)

Claims: What is claimed is: 1. A beverage composition characterized by: at least 2 ppm of an aminopolycarboxylic acid; and a polyphosphate. 2. The beverage composition of Claim 1 further characterized by at least about 5 ppm EDTA. 3. The beverage composition according to any of the preceding claims further characterized by Calcium Disodium EDTA. 4. The beverage composition according to any of the preceding claims further characterized by a polyphosphate having the formula where n averages from about 3 to about 100 and each M is independently selected from the group of sodium and potassium atoms. The beverage composition according to any of the preceding claims further characterized by a preservative selected from the group consisting of sorbic acid, benzoic acid, alkali metal salts thereof and mixtures thereof. 6. The beverage composition according to any of the preceding claims further characterized by a vitamin compound selected from the group of water soluble vitamins, oil soluble vitamins, flavor oils, and combinations thereof. 7. The beverage composition according to any of the preceding claims further characterized by at least about 80 percent added water, wherein the added water has a hardness of less than about 60 ppm. 8. The beverage composition according to any of the preceding claims characterized by a pH of between about 2.5 and about 3.5. 9. A beverage composition characterized by: (a) a first chelating agent; and (b) a second chelating agent different from the first chelating agent; wherein the second chelating agent has a rate of hydrolysis greater than that of the first chelating agent. 10. The beverage composition of Claim 9 wherein the first chelating agent is characterized by an aminopolycarboxylic acid and the second chelating agent is characterized by a polyphosphate having the formula: where n averages from about 3 to about 100 and each M is independently selected from the group of sodium and potassium atoms.

Inventors: KEARNEY DONALD RAYMOND, KIRKSEY SANFORD THEODORE JR, KEARNEY, DONALD, RAYMOND, KIRKSEY, SANFORD, THEODORE, JR.
Applicants: PROCTER & GAMBLE, THE PROCTER & GAMBLE COMPANY
Application year: 2000
Main classification: A23L2
IPC codes: A23L1, A23L2