bluuebunny/crossref_metadata_2025_split huggingface dataset:
Characterization of the Phosphoryl‐Nitrogen Linkages in Histone H4
Authors: Bruegger B. B. , Delange R. J. , Smith R. A. , Lin Y. C. 
Published: June 2015

AbstractIn earlier work we nave described and partially characterized two histone kinases from regenerating rat liver and other tissues which catalyze the transfer of the γ‐phosphoryl group from ATP to histones. The histone phosphates thus formed were observed to be acid‐labile and base‐stable. In the present study we report on the specificity of one of these enzymes, namely, the kinase which is optimally active at pH 9. This enzyme appears to be relatively specific for the two histidine residues of histone H4. These histidines occur at positions 18 and 75, and both are phosphorylated. However, when regenerating rat liver was the source of enzyme, the product was 1‐phosphohistidine, whereas the enzyme from Walker‐256 carcinosarcoma catalyzed the formation of 3‐phosphohistidine.
Synthesis of 2‐(6‐Methoxy‐2‐Quinolyl) Chromone Derivatives
Authors: Hsu K. K. , Wu T. S. 
Published: June 2015

AbstractIn the continuous investigation of structure and activity correlation of flavonoids, several 2′‐hydroxy‐2‐6(6‐methoxy‐2‐quinolyl)chromone derivatives and their intermediates 2′‐hydroxy‐2‐(6‐methoxy‐2‐quinolyl)acrylophenones were synthesized by the condensation of 6‐methoxy‐2‐quinoline aldehyde with appropriate 2‐hydroxoxy‐acetophenones in the presence of alcoholic potassium hydroxide, and then oxidized by selenium dioxide.
Metal Chelate Complexes of the Schiff Bases Derived from Salicylaldehyde and Methyl Ethers of Aminophenols (Anisidines)
Authors: Dubey K. P. , Kachru C. N. , Wazir B. L. 
Published: June 2015

AbstractSome transition metal chelates of the Schiff's bases derived from salicylaldehyde and o ‐anisidine, m ‐anisidine and p ‐anisidine have been isolated and characterized. The structures of these complexes have been discussed on the basis of their elemental analyses, conductivities, magnetic moment values, electronic and infrared spectral data.The Ni2+, Cu2+ and Zn2+ form ML2 type compounds, UO22+ and Fe3+ form dimeric [UO2 L2]and [Fe L2 Cl]2 respectively.
Molecular Structure of 4‐(p‐N, N‐Dimethylaminostyryl) Pyridine Methiodide
Authors: Lu T. H. , Lee T. J. , Wong C. , Kuo K. T. 
Published: June 2015

AbstractC18H19N2I, Mr=366.24, monoclinic, space group P21/n, a=6.298, b=7.659, c=32.579 Å,β=101.54° (from Syntex Pl̄ diffractometer), Z=4. Dc=1.59, Dx=1.58(2)gm cm−2 (by flotation), m. p. 253°C. The compound was solved primarily by heavy atom method. The final R value was 0.067.
The Extractive‐Spectrophotometric Determination of Iron(III) As a Mixed‐Ligand Complex with N‐Hydroxy‐N, N′DI‐p‐Tolyl‐p‐Toluamidine and Thiocyanate
Authors: Patel K. S. , Deb K. K. , Mishra R. K. 
Published: June 2015

AbstractThe extractive‐photometric determination or iron(III) as a mixed‐ligand complex with N ‐hydroxy‐N, N′ ‐di‐p ‐tolyl‐p ‐toluamidine (HDTTA) and thiocyanate is described. The orange‐red Waterinsoluble 1:1:2 (metal: HDTTA: SCN−) ternary complex formed in 0.1–0.6 M hydrochloric acid solutions is quantitatively extractable into benzene. The wavelength of maximum absorption, molar absorptivity and sensitivity of the colour system are 460nm, 12000 l. mole−1 cm−1 and 0.0046 μg Fe/cm 2respectively. The influence or foreign ions on the determination of iron has been studied. This method has also been applied to determine the iron content of several alloys.
Quantitative Estimation of Ruthenium(III) Using Morpholine‐4‐Carbodithioate as a New Analytical Reagent
Authors: Kumar Ravindra , Singh Nepal , Kansal B. D. 
Published: June 2015

AbstractRuthenium(III) has been precipitated gravimetrically in the pH range 7.0‐8.5 with morpholine‐4‐carbodithioate and determined by weighing as a black complex (C5H6ONS2)3 Ru after drying at l00–110°C. The interference of the various metal ions has been avoided by using an ammonical mixture of EDTA and tartrate (1:1 molar ratio). The complex is thermally stable up to l60°C.
Synthesis of Optically Active l‐Menthol Part II. Isolation of dl‐Menthol from the Mixture of dl‐Menthol Isomers
Authors: Chang Teh‐Chou 
Published: June 2015

AbstractThe mixture of dl ‐menthyl chloroaeetate isomers and the mixture of dl ‐menthyl cyanoacetate isomers were prepared by the esterification of the mixture of dl ‐menthol with chloroacetic acid and cyanoacetic acid, respectively. In these mixtures the dl ‐menthyl chloroacetate m. p. 23–24° and the dl ‐menthyl cyanoacetate m. p. 63–63.5° are crystal form, the other isomers, such as dl ‐isomenthyl cyanoacetate b.p. 136–138°/3mmHg are liquid form. The crystal form ester was isolatded from liquid form ester by cooling crystallization, and then dl ‐menthol m. p. 32–33° was obtained by hydrolysis. The isolation effect has intimately relation to the dl ‐menthol content in raw material, the more dl ‐menthol content, the more yield and purity of crystal form ester, therefore, after hydrolysis, the obtained dl ‐menthol was excellent in purity.
Study of the Extractive Constituents from the Wood of Cuninghamia Konishii Hayata
Authors: Cheng Yu‐Shia , Lin Cheng‐Shan 
Published: June 2015

AbstractFrom the neutral fraction of the acetone extractive of the wood of Cuninghamia konishii Hayata, α‐terpineol, cedrol, α‐cedrene, β‐cedrene, caryophyllene, α‐terpinyl acetate, cedryl acetate, α‐terpineol oxide, caryophyllene oxide, docosanol, tetracosanol, hexacosanol, β‐sitosterol and stigmasterol were isolated. Straight chain saturated hydrocarbon (C20H42‐C30H62) were also obtained.
Spectral Studies of Mercaptoacid Amides III: Nuclear Magnetic Resonance Spectra
Authors: Bateja S. , Chandrashekhar S. , Bhandari C. S. , Sogani N. C. 
Published: June 2015

AbstractNMR spectra of twelve newly synthesised mercaptoacid amides are being reported and discussed.The syntheses and structure of more than thirty mercaptoacid amides have been reported(1‐3) from our laboratories. The study has revealed that N ‐phenyl‐2‐mercaptoacetamide and related compounds have intramolecular hydrogen bonded structure (I).magnified image
Determination of Palladium Using Hydroxylamine Hydrochloride as Metal Precipitant
Authors: Raoot Sarala , Vaidya V. G. 
Published: June 2015

AbstractAn analytical investigation on the quantitative reduction of palladium (II) to the metal with hydroxylamine hydrochloride in alkaline medium has been carried out. Accurate and reproducible results for the gravimetric determination of 3 to 30 mg of palladium have been recorded. Effects of various foreign metal ions on the determination have been studied.
A Comparative Study of Chemical‐Initiated and Radiation‐Induced Graft Copolymerization of Methyl Methacrylate onto Bamboo by Infrared Spectroscopic Technique
Authors: Lin K. C. , Lin Y. S. , Hsu T. C. 
Published: June 2015

AbstractGraft copolymerization of methyl methacrylate onto bamboo was evidenced by means of infrared spectroscopic technique. A comparative study of chemical initiated and radiation‐induced grafting methods was made. The chemical‐initiated copolymerization treatment with water as the swelling agent can yield high grafting percentage, whereeas the radiation‐induced copolymerization treatment gives very low grafting percentage.
Synthesis of Insect Sex Pheromones and Their Homologues I. (Z, E)‐9, 11‐Alkadienyl Acetates
Authors: Lin Yuh‐Meei , Chow Yien‐Shing , Hsu Stella C. L. 
Published: June 2015

Abstract(Z, E)‐9, 11‐Tetradecadienyl‐l‐acetate (1), a major component of the sex pheromone of Spodoptera litura (F.), and (Z, E}‐9, 11‐pentadecadienyl‐1‐acetate (2) were synthesized by the Wittig reaction between (E)‐2‐alkenal (3) and the ylid derived from 9‐hydroxynonyltriphenylphosphonium bromide (4).
Kinetics of Silver‐Catalysed Oxidation of dl‐Atrolactic Acid (A. L. A.) by Potassium Peroxydisulphate
Authors: Singh Hambir , Prasad Mahesh , Saksena S. C. , Kansak B. D. 
Published: June 2015

AbstractKinetic data of silver catalysed oxidation of dl‐atrolactic acid (A. L. A.) by peroxydisulphate ion are reported. The reaction is first order with respect to S2O52 ion zero order with respect to A. L. A. The rate is linearly related with Ag+ ion concentration. The oxidation products of A. L. A. were found to be CO2and acetophenone, which establish the fission of C‐C bond in the oxidation process. The mechanism of the reaction and inhibition by various substrats has been discussed.
Lanthanon (III) Derivatives of Monofunctional Bidentate Schiff Bases
Authors: Gharia K. S. , Mathur (Miss) Shakuntala , Singh Megh , Sankhla B. S. 
Published: June 2015

AbstractThe 1:1, 1:2 and 1:3 interactions of lanthanon (III) isopropoxide with monofunctional bidentate Schiff bases as salicylidene‐o‐toluidine (SOTH) and salicylidene‐p‐p‐toluidine (SPTH) have been investigated. The resulting products Ln(OPr1)2(SB), Ln(OPr1)(SB)2 and Ln(SB)3 (where Ln=Pr, Nd and Sm and SB1− is the anion of the corresponding Schiff base) have been isolated in almost quantitative yields. The infrared spectra of these compounds have been recorded and plausible structures suggested.
A Sensitive Spectrophotometric Determination of Niobium (V) with 5, 7‐Dinitro‐8‐Hydroxyquinoline
Authors: Sharma Yogendu , Shivahare G. C. 
Published: June 2015

AbstractNiobium (V) reacts with 5,7‐dinitro‐8‐hydroxyquinoline to form yellowish‐orange coloured complex having maximum absorbance at 420 nm in citric acid medium. The reaction is slow at room temperate, it is complete in 15 minutes at temperate 40°. The colour is stable for at least 16 hours. Effects of heating temperate, time, pH, reagent concentration and other variables have been studied. The system confirms the Beer's law over the concentration range investigated. Optimum condition range for measurement in 10 mm cell is 1–12 μg of niobium. The molar absorptivity is 5.327 × 108 litre moles−1cm−1. The interference from foreign ions has been evaluated. The metal ligand ratio of 1:2 was confirmed by Job's continous variation and mole ratio methods.
Assay of Aspirin, Ethenzamide and Caffeine Mixture by 13C NMR Spectrometry
Authors: Chiang Hung‐Cheh , Imanari Mamoru 
Published: June 2015

Abstract13C FT NMR method of gated decoupling without NOE was applied in the quantitative analysis of aspirin, ethenzamide and caffeine mixture (antipyretic). Spectra were obtained in pyridine‐d5, containing anisole as an internal standard and chromium(III) acetylacetonate as a paramagnetic relaxation reagent, The results were generally satisfactory.
Contstituents of Formosan Folk Medicines X. Chemical Constituents of the Rhizoma of Onychium Contiguum (Wall.) Hope
Authors: Wu Tian‐Shung , Chen Ming‐Tyan , Kuoh Chang‐Sheng , Yang Jih‐Jen 
Published: June 2015

AbstractPhytosterol mixture (campesterol, 15.3%; β‐sitosterol, 84.7%), sucrose and kaempferitrin were isolated from the ethanolic extracts of the rhizoma of Onychium contiguum (Wall.) Hope (Pteridaceae).
Preparation and Analytical Application of a New Chelating Ion Exchange Resin Containing Thioglycolic Acid
Authors: Liu Chuen‐Ying , Sun Peng‐Joung 
Published: June 2015

AbstractStarting from copolymerization of acrylonitrile and divinylbenzene by emulsion polymerization technique, a macroporous, crosslinked polyacrylonitrile copolymer was synthesized. The nitrile groups on the copolymer resin were converted into carboxylic acid groups by hydrolysis with strong alkaline solution of sodium hydroxide to obtain the resin matrix with carboxylic acid groups. A new chelating ion exchange resin containing alkylthioglycolate was prepared by esterification of carboxylic acid groups on the resin matrix and thioglycolic acid with 1,6‐hexanediol as binding part. After studies of the basic characters, ion exchange ability, exchange rate and acidity of the medium, it was found that the new resin obtaind was highly selective for silver(I), mercury(II), gold(III) and bismuth(III) in acidic‐aqueous solution. Separation of these metal ions from each other and concentration of these metal ions from very dilute solution were studied by liquid chromatography using a short column of this new resin. The analytical applications of this new resin are reported.
Electronic Absorption Spectra of Substituted Phenols
Authors: Masoud Mamdouh S. , Ali G.Y. 
Published: June 2015

AbstractThe spectral properties of o‐aminophenol, catechol, o‐nitrophenol, pyrogallol, salicylic acid and gallic acid were investigated in different solvents. The behaviour of hydrogen bonding demonstrated in these systems was discussed.
Some Cyclopentadienyl and Indenyl Niobium(V) Phenoxides
Authors: Rastogi M. K. , Nigam S. N. 
Published: June 2015

AbstractSome cyclopentadienyl and indenyl niobium(V) phenoxides are reported in this communication. The effect of different types of groups in the phenoxide ring is related with the stability of the compounds. It has been established that only those phenols which have two hydroxyl groups in the ortho position are able to form chelates. The cyclopentadienyl and the indenyl rings are π‐bonded to niobium atom. The complexes have been characterised by elemental analysis and i.r. spectra.
The Stabilities and Thermodynamic Properties of Thorium(IV) and Zirconium(IV) Chelates of Ethylenebis (Oxyethylenenitrilo) Tetraacetic Acid
Authors: Hseu Tong‐Ming , Jyi Kae‐Ming 
Published: June 2015

AbstractThe interaction between ethylenebis(oxyethylenenitrilo)tetraacetic acid (EGTA or H4Z) and Th(IV) and Zr(IV) ions has been investigated potentiometrically by using a mercury indicator electrode. The formation constants of the chelates ThZ and ZrZ have been evaluated at a constant ionic strength of 0.10 (KNO3) and at 0, 10, 20, 30 and 40°. Enthalpy and entropy changes characterizing the formation of the chelates have been calculated by the least‐squares method at 25°. The results are collected as follows:magnified image
Spectrophotometric Determination of Copper with Diacetylmonoquinolylhydrazone
Authors: Anipindi A. R. , Jain P. , Singh R. P. 
Published: June 2015

AbstractSynthesis of a new reagent diacetylmonoquinolylhydrazone (DAmQH) and its application in the selective spectrophotometric determination of copper is presented. DAmQH reacts with copper instantaneously to form a green complex in the pH range 7.5–11.6 with molar absorptivity 1.45 × 104 l mole−1 cm−1. Beer's law is obeyed upto 2.20 ppm of copper. Copper has also been analysed in several alloys.
Valence Charge Transfer in Cubic BN Crystal by X‐Ray Diffraction
Authors: Chen Ruey‐Hong 
Published: June 2015

AbstractThe X‐ray diffraction data of cubic BN were reanalyzed by aspherical electron charge distribution model. The valence‐charge densities of nitrogen atom and boron atom were represented by a finite multipole deformations. A least‐squares refinement of the model charge was computed by fitting population parameters and thermal parameters. The result showed that there is a tendency toward a ionic bond in going from IV‐IV compouds to III‐V compounds.
Application of Iodide Ion Selective Electrode to the Study of Stepwise Formation Constant and Solubility Product of Lead Iodide
Authors: Chang Wen‐Lie , Chang Fu‐Chung , Wu Shaw‐Chii 
Published: June 2015

AbstractIodide ion‐selective electrode were studied, prepared and applied for the complex formations and solubility product determination. The thermodynamic formation constant of PbI+ and the solubility product of PbI3 were found to be 54 and 9.2 × 10−9, respectively. The formation constant of PbNO3+ was calculated to be 4.6 from the different formation constant of PbI+ in perchlorate and nitrate media.
A Convenient Procedure for Phase Transfer Catalyzed Acetylation of Hindered Phenols
Authors: Liu Kwang‐Ting , Kuo Mann‐Yan 
Published: June 2015

AbstractA facile and generally applicable procedure for acetylation of hindered phenols using tetra‐n‐butylammonium bromide as phase transfer catalyst and acetic anhydride as acetylation agent has been developed. The isolation yield is 85–91%.
Preparation and Characterisation of Bis (η5‐Cyclopentadienyl) N,N‐Disubstituted Dithiocarbamato Chloro Oxotungsten (VI) Complexes
Authors: Kaushik Narender K. , Sodhi Gurvinder S. , Sangari Harpal S. , Chhatwal Gurdeep R. 
Published: June 2015

AbstractBis (η5‐cyclopentaienyl) N,N‐disubstituted dithiocarbamato chloro oxotungsten (VI) complexes of the type η5‐Cp2WO(S2CNR2)Cl and η5‐Cp2WO(S2CNRR')Cl (where R=Me, Et and i‐Pr and R'=Cyhx) have been prepared by the reaction of bis (η5‐cyclopentadienyl) oxotungsten (VI) dichloride with sodium salts of dithiocarbamic acids in refluxing tetrahydrofuran. Infrared spectral studies demonstrate that in these complexes dithiocarbamate ligands are bidentate. Therefore, tungsten (VI) atom may be assigned a coordination number 6 in all these complexes. Elemental analyses of these compounds have also been carried out. Electronic spectra have been recorded for all the six complexes.
Regiospecific Syntheses of Sulfoxides and Sulfones of the (Z)‐Configuration
Authors: Liu Lilian Kao , Luo Fen‐Tair , Shia See‐Ying 
Published: June 2015

AbstractA convenient synthesis for varions (Z)‐1‐alkanesulfinyl‐2‐phenylethenes has been developed. This involves addition of different sodium thiolates to phenylacetylene in ethanol, and oxidation of the resulting (Z)‐1‐alkanesulfenyl‐2‐phenylethenes [(Z)‐styryl alkyl thioethers] with sodium metaperiodate supported on acidic alumina. The corresponding sulfones can be obtained by oxidation of these (Z)‐styryl alkyl thioethers with hydrogen peroxide in glycial acetic acid, or, alternatively by reduction of the β‐iodostyrylsulfones with zinc in acetic acid. These β‐iodostyrylsulfones were obtained by addition of the corresponding sulfonyl iodides to phenylacetylene under the catalytic action of cupric chloride and triethylaminium chloride.
The Complexation of Lanthanides by AZO‐β‐Diketones Stability Constants
Authors: Zahra A.M. , Ramadan A.A.I. , El‐Shetary B.A. , Abdel‐Moez M.S. 
Published: June 2015

AbstractThe stability constants of the complexes between the trivalent lanthanide series of cations and series of azo‐β‐diketone ligands are reported. The measurements were conducted at 30° at an ionic strength of zero, in 100% methanol.The relation between the overall stability constant (log β2) and atomic number of the lanthanide elements, shows a buffer zone at the gadolinium area. The relation between (log β2) and the basicity of the studied ligands (ΣpK's) are also, discussed.The overall stability values obtained reflected a great affinity of the organic ligands for chelation with lanthanide ions.
The Study of Steric Effect on the Magnetic Interaction between Two Metal Ions in a Binuclear Complex
Authors: Wang Wen‐Jwu 
Published: June 2015

AbstractComplexes of cupric ion with N,N′‐bis(2‐pyridylethyl)‐oxamide, prepared from 2‐(aminoethyl)pyridine and diethyloxalate, and pyridine derivatives have been synthesized and characterized by elementary analysis, i.r. spectra, u.v. spectra, magnetic susceptibility, and electric conductivity measurements. Existance of magnetic interaction between cupric ion could be recognized. Magnetic interaction may be affected by the pyridine derivatives.
Studies on the Ion‐Exchange Chromatographic Separation of L‐Ascorbic Acid and Oxalic Acid
Authors: Chang E.E. , Hsu Tong‐Jung , Kao W.Y. , Yang C.C. 
Published: June 2015

AbstractL‐Ascorbic acid and oxalic acid could be successfully separated with a column of 8% cross‐linked sulfonated polystyrene cation‐exchange resin in hydrogen form, and eluted with 0.01% aqueous solution of nitric acid, sulfuric acid, or phosphoric acid. Among the mineral acids used, nitric acid showed the best separatory effect. The minimum detectable quantities of the acids were 0.05 μg and 0.5 μg per 0.5 ml sample solution for L‐ascorbic acid and oxalic acid, respectively. Under this condition, the acids could be detected by using automatic UV‐monitor apparatus.
Pyrolysis of Nickel Zirconyl Oxalate
Authors: Reddy V.B. , Mehrotra P.N. 
Published: June 2015

AbstractNickel zirconyl oxalate hexahydrate (NiZrOx) is δ prepared and characterised by I.R. spectral and chemical analysis. Its thermal decomposition has been investigated by employing TG, DTG, DTA and chemical analysis. End product was identified by X‐ray diffraction studies. The decomposition proceeds through four steps i) dehydration of NiZrOx in two steps, ii) partial decomposition of oxalate to give an oxalate carbonate intermediate, iii) decomposition of oxalate to give a non‐stoichiometric carbonate and iv) decomposition of this non‐stoichiometric carbonate to give the end product a mixture of NiO+ZrO2. On the basis of the results obtained, a tentative scheme for the decomposition of NiZrOx is proposed.
Decomposition of Triethylamine Over Acid Catalysts
Authors: Ebeid Fikry M. , Gheit Ahmed K. Aboul , Ezzo Esam M. , Ali Leila I. 
Published: June 2015

AbstractThe effect of hydrochloric acid, boric acid, and silica content in alumina on its catalytic activity towards the decomposition of triethylamine was investigated at 310°, 320°, and 330°. The study was carried out in a flow system and the reaction product was analyzed chromotographically. Ethylene formation is a zero order reaction independent of the partial pressure of triethylamine. Treating γ‐alumina with hydrochloric acid increases its catalytic activity towards ethylene formation whereas silica‐alumina is less active than γ‐alumina. Boric acid‐treated alumina has the same activity of γ‐alumina. Formation of ethylene from preadsorbed triethylamine was studied. The similarity between reactions of aliphatic alcohols and amines over acid catalysts is concluded.
Spectrophotometric Determination of Cobalt(II), Nickel(II) and Copper(II) with Acenaphthenequinone Monosemicarbazone (AQSC)
Authors: Singh S.K. , Sindhwani (Miss) Kamini , Sindhwani S.K. 
Published: June 2015

AbstractCobalt(II), nickel(II) and copper(II) complexation with acenaphthenequinone monosemicarbazone (AQSC) has been studied spectrophotometrically. The Co(II), Ni(II) and Cu(II) complexes are soluble in ethanol medium and exhibit maximum absorbance at 410, 420 and 430 nm, respectively. The sensitivity of the reactions are 0.012, 0.02 and 0.01 μg/cm2 for cobalt, nickel and copper systems. All the three complexes show maximum and constant absorbance in the pH range 8.4 to 9.8, 6.3 to 8.4 and 5.4 to 8.0 for Co‐AQSC, Ni‐AQSC and Cu‐AQSC, respectively. Nickel and copper in some alloys have also been analysed.
Synthesis and Infrared Spectral Study of Neodymium Furfuroxides and Tetrahydrofurfuroxides
Authors: Solanki Ashok K. , Wadhwa Sarita , Bhandari Akshya M. 
Published: June 2015

AbstractNd(OR')3, Nd(OR)(OR')2 and Nd(OR)2(OR') are prepared from neodymium isopropoxide and furfurylalcohol and tetrahydrofurfuryl alcohol in different stoichiometric ratios under reflux where OR=OPri or OBu'; OR'=deprotonated furfuryl and tetrahydrofurfuryl alcohol. Neodymium tertiary butoxide derivatives were prepared by alcohol exchange technique from the corresponding isopropoxide derivatives. The i.r. spectra of the alkoxy derivatives are discussed.
Synthesis of Hexa‐O‐Methyl‐8‐(8“‐Naringeninyl)Apigenin
Authors: Lee Ing‐Huei , Chen Fa‐Ching , Lin Yuh‐Meei 
Published: June 2015

AbstractThe title compound was prepared from 8‐iodo‐5,7,4′‐trimethoxyflavone and 8‐iodo‐5,7,4′‐trimethoxyflavanone using modified condition for the Ullmann condensation.
Selective Spectrophotometric Determination of Copper in Milk with Phenanthraquinone Monothiosemicarbazone
Authors: Sinha P. P. , Kamil F. , Sindhwani S. K. , Singh R. P. 
Published: June 2015

AbstractThe red complex formed by copper (II) and phenanthraquinone monothiosemicarbazone has an absorption maximum at 530 nm with a molar absorptivity of 14000 cm−1 mole−1. The pH range for the determination is 1.1–6.6. Optimum range of concentration for accurate determination is 0.50–3.47 ppm of copper (II) in 50% methanol medium. The limits of interference due to foreign ions have been studied. The method has been successfully employed for the determination of copper in various samples of milk.