bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preliminary Study on Indirect Polymerization with Electrolytically‐Generated Redox Initiators—A New Method of Polymerization
Authors: Lin Tzu Fang , Chung Jiann‐Sheng 
Published: June 2015

AbstractFeCl3, CrCl3, CH3NH2·HCl and H3NNH2·2HCl were used as the electrolytes which were dissolved in water, methanol or DMF. The redox initiators which composed of oxidizing agent and reducing agent were produced in the anode and cathode chamber respectively through electrolysis. It was found that the redox initiators obtained by using organic electrolytes of CH3NH2·HCl and H2NNH2·2HCl have much better polymerization yield of MMA than those of using inorganic electrolytes such as CrCl3, FeCl3. The reasons of different yields with different electrolytes are also discussed.
Spectrophotometric Determination of Iron (III) Using 3‐Hydroxy‐2‐Methyl‐1,4‐Naphthoquinone Monoxime (HMNQM)
Authors: Kamini (Miss) , Kamil F. , Sindhwani S. K. 
Published: June 2015

AbstractIron (III) forms brown coloured complex with 3‐hydroxy‐2‐methyl‐1,4‐naphthoquinone monoxime. The iron (III)‐HMNQM complex is found to be soluble in DMF and exhibits maximum absorption at 470 nm in the pH range 4.5–5.5. Beer's law is obeyed upto 5.58 ppm of iron (III) and sensitivity of the reaction is 0.0046 μg/cm2, with molar absorptivity of 1.21×104 ℓ mole−1 cm−1. The method has been used for the determination of iron (III) in alloys.
Spectrophotometric and Polarographic Studies of the Uranium in Acetate Medium in the Presence of Resorcinol
Authors: Zahra Ahmed M. , El‐Inany Gaber A. , El‐Maraghy S. B. 
Published: June 2015

AbstractUranyl ion reduction was studied in acetate buffer‐resorcinol medium. Two waves were obtained for all pH. Resorcinol can be used as a maximum suppressor. Complexation of uranium with resorcinol was accompanied by a decrease in diffusion current and shift of half‐wave potential to more negative values. Mixed complexes of acetate and resorcinol were formed with uranium. Resorcinol stabilizes the pentavalent uranium by complexaion.
Polarographic Behaviour of Quinalidic Acid in Aqueous and Nonaqueous Solutions
Authors: Hindawey A. M. , Abou Ali S. A. , Salem T. M. , Mohamed G. B. 
Published: June 2015

AbstractThe polarographic behaviour of quinaldic acid is studied in aqueous universal buffer solutions as well as in mixed organic solvent viz. methanol, n‐propanol, dimethyl formanide (DMF) and dimethyl sulphoxide (DMSO).The solvent proportion in the medium is maintained at 30% (v/v). The polarographic reduction gives two irreversible reduction waves. The nature of the waves and the electrode reaction are investigated. The electroreduction waves is proposed.
The Complexation of Some Transition Metals by Acetoacetanilidehydrazo Ligands “Stability Constants”
Authors: Taha Atef A. , El‐Inany Gaber A. 
Published: June 2015

AbstractAcid dissociation constants of acetoacetanilide abbreviated (AAA); Orthocarboxy‐phenylhydrazoacetoacetanilide (o‐CPHAAA); and orthocarboxy‐phenylhydrazo‐parachloro‐acetoacetanilide (o‐CPH‐p‐Cl‐AAA) and chelate stability constants of the corresponding anions with Cu+2, Ni+2, CO+2, Zn+2, Mn+2, and Cd+2 ions are reported. The infra‐red spectra of o‐CPHAAA and o‐CPH‐p‐Cl‐AAA ligands and their chelates for copper and nickel are discussed.
Stability Of 2‐Carboxyphenylhydrazoacetoacetanilide, and 2‐Carboxyphenylhydrazobenzoylacetone Complexes of Rare‐Earth Elements in Mixed Solvents
Authors: Taha Atef A. , El‐Inany Gaber A. 
Published: June 2015

AbstractThe overall stability constants of the 1:1 and 2:1 2‐Carboxyphenylhydrazoacetoacetanilide (2‐CPHAAA) and 2‐Carboxyphenylhydrazobenzoylacetone (2‐CPHBA) rare‐earth chelates, were determined by a potentiometric method. The variation of the overall stability constants, “log β” with atomic number, of the lanthanide was ascribed to different degrees of dehydration of the cations. The 2‐CPHBA ligand exhibited less affinity for rare earth cations than 2‐CPHAAA.The correlation of “log β” versus the basicity of the ligands showed that 2‐CPHAAA and 2‐CPHBA form the same type of chelate in polar solvents but differ in non polar solvents.
Catalytic Pyrolysis of Methane
Authors: Fang Treliant , Yeh Chuin‐Tih 
Published: June 2015

AbstractMethane decomposition over metal oxides/SiO2 surface was investigated. At 1400 K obtained product distribution of this decomposition varied with metal oxide used. The effectiveness of these catalysts has been discussed in terms of activity and C2 selectivity. ThO2/SiO2 was found to be the most effective catalyst for the catalytic decomposition of methane. Positive catalytic effect of ThO2/SiO2 on the pyrolysis has also been confirmed at 1073 K. At low reaction conversions, ethane and ethylene are found as major products. Yields of ethylene and other unsaturated products are sensitively inhibited by NO impurities in the methane. A reaction mechanism has been proposed to account observed experimental results.
Compositions of the Essential Oils of Litsea Kostermanin Chang, Litsea Gerciae Vidal and Litsea Cubeba (Lour.) Persoon
Authors: Cheng Ming‐Chu , Cheng Yu‐Shia 
Published: June 2015

AbstractThe essential oils from the leaves and stems of Litsea kostermanin Chang and Litsea cubeba (lour.) Persoon, and the leaves of Litsea gerciae Vidal were analysed to determine the detailed composition of each oils. The major constituents were isolated and identified by GLC, IR, and NMR. The analyses showed that large chemical differences exist among L. kostermanin Chang, L. gerciae Vidal and L. cubeba (lour.) Persoon.
Cesium Ion‐Selective Electrode
Authors: Chang Fu‐Chung , Wu Shaw‐Chii , Huang Chiang‐Ho 
Published: June 2015

AbstractThe membrane material was prepared by mixing 40% of cesium‐triphenyl‐cyanoborate and 60% of PVC powder. The mixture was pressed at a pressure of 20tons/cm2 for 1hours to make the membrane. Then, the membrane was mounted on a self‐constructed electrode body. Nernstian slope of 60 mv/decade was obtained throughout the concentration range 10−1∼2×10−5M. Selectivity coefficients were presented. The life time of the electrode is longer than 6 months.
Gas‐Liquid Chromatographic Determination of Pipemidic Acid
Authors: Chen Su‐Hwei , Wu Hsin‐Lung , Lin Shun‐Jin 
Published: June 2015

AbstractA gas chromatographic method was established for the quantitative analysis of pipemidic acid. The method is based on alkylation of pipemidic acid with diazomethane catalyzed by boron trifluoride. The sample was chromatographed on a stainless steel column packed with 5% OV‐101 on Chromosorb G‐HP and n‐octacosane was used as an internal standard. Quantitation is achieved by measuring peak‐height ratio. The method was satisfactorily applied to the analysis of pipemidic acid in tablet.
Synthesis of Some N‐Substituted Benzene Alkamines
Authors: Kachroo P. L. , Andotra Charanjit Singh , Langer T. C. 
Published: June 2015

AbstractSynthesis of N‐β‐phenylethyl‐2:4‐dialkoxy‐5‐alkylbenzylamines having different alkyl and alkoxy groups have been described.
Differential Pulse Polarographic Determination of Trace Molybdenum in Uranium with α‐Benzoinoxime Extraction
Authors: Wu Cheng‐I , Chang Fu‐Chung , Yeh Yu‐Chai 
Published: June 2015

AbstractA method for the determination of trace molybdenum in uranium is described based on its specific catalytic reduction wave in the presence of nitric acid. Molybdenum is separated from uranium by α‐benzoin oxime extraction and determined by differential pulse polarography. As lower as 1 ng/ml of Mo(VI) is determinable and 98% of recovery can be obtained at present work.
The Chemical Constitutents of Coniogramme Japonica (Thunb.) Diels
Authors: Chen Yu‐Min , Chang Teh‐Chou 
Published: June 2015

Abstractβ‐Sitosterol, β‐sitosteryl palmitate, β‐sitosteryl‐β‐D‐glucoside and cyclolaudenol were isolated from the rhizomes, long chain aliphatic esters and an UV stabilizer, octabenzone, were isolated from the leaves of Coniogramme japonica.
Molecular and Crystal Structure of Magnolol—C18H18O2
Authors: Wang Yu , Cheng Ming‐Chu , Lee Ju‐Shiung , Chen Fa‐Ching 
Published: June 2015

AbstractMagnolol, 2, 2′‐dihydroxy‐5, 5′‐diallylbiphenyl (C18H18O2) was isolated from the heartwood of Taiwan sassafras, Sassafras randaiense (Hay.) Rehd. (Lauraceae) and characterized by single crystal X‐ray diffraction. It crystallized in monoclinic P 21/C. The cell parameters are a=10.905(3), b=8.834(4), c=16.103(9) Å, β=106.76°(3), z=4. The structure was solved by direct method. The dihedral angle between two benzene rings is about 45′ which seems to be the best arrangement for intra‐ and inter‐molecular H‐bondings. O … O distances are ∼2.6 Å which indicate very strong H‐bonding. The solid structure can be discribed as a helix chain of molecules connected through H‐bonds parallel to b‐axis.
The Photochemistry of Diazomethane‐Acetonitrile Mixtures. The Reaction of Methylene with Acetonitrile
Authors: Huang C. F. , Lin T. S. , Ho S. Y. 
Published: June 2015

AbstractThe photochemistry of diazomethane‐acetonitrile gaseous mixtures has been studied. Propionitrile was produced by the reaction of methylene radicals with acetonitrile. At lower pressures the product propionitrile decomposes and the measured decomposition rates are 1.14×109 sec−1 and 2.70×108 sec−1 at 3660 and 4358 Å, respectively.
Selective Separation of Gold on Amberlite xad‐4 Impregnated with Dmabr
Authors: Chien Chun‐Ching , Chang Fu‐Chung , Wu Shaw‐Chii 
Published: June 2015

AbstractDMABR (5‐(4‐Dimethylaminobenzylidene)‐rhodanine) is proved to be a very selective reagent for gold as it impregnated on XAD‐4. Gold is selectively adsorbed on resin through the formation of Au(I)‐DMABR. Distribution coefficients at different pH were determined. The selectivity and interference were studied. Less than 0.1 ppb of Au could be adsorbed on resin. It can be directly determined by NAA or cluted down with cyanide solution and determined by AAS.
Average Configuration of Finite Polymer with Excluded Volume Interaction
Authors: Mou Chung Yuan 
Published: June 2015

AbstractA quasi‐thermodynamic model for expansion of polymer configuration in solution is investigated. The model is based on Gaussian distribution of segments and mean field theory of polymer solution. An in‐homogeneous contribution to the free energy of solution is proposed. It arises from the nonhomogeneous distribution of polymer segements. This effects makes the expansion factor α to be larger than those without the effect considered. Some numerical consequence for the case Polydimethylsiloxane+cyclohexane solution is calculated. Our theory predicts a larger value a than the case without inhomogeneous effect being considered. The difference becomes less significant at higher molecular weight.
Mössbauer and Electrochemical Studies of Bridged Biferrocenes and Biferrocenylenes
Authors: Wei Ho‐Hsiang , Chang Shinn‐Jen 
Published: June 2015

AbstractA series of neutral and oxidized π‐bridged biferrocenes (Fc—x—Fc) and biferrocenylenes (FC(—x—)2Fc) (x= —CH=CH—, —CH3,C=CCH3—) were prepared and their physical properties have been studied by means of Mössbauuer and cyclic voltammetry. The electrode reaction of these bridged ferrocene derivatives appears to involve a consecutive two‐step oxidation process. The results also show that the voltage difference between the first and second oxidaton potentials of the bridged biferrocenes was found to be largely exceeded that founded for the corresponding the bridged biferrocenylenes. The Mössbauer data show that the oxidation of doubly bridged Fc(—x—)2Fc with iodine, DDQ, and TCNQ given the corresponding dioxidized salts only and no stable mixed‐valence compounds were found.
Kinetics of the Reduction of Cupric Ion in Ammonia Solution by Sulfur Dioxide
Authors: Kao Chen‐Feng , Shih Yi‐Jen , Lai Tsai‐Teh 
Published: June 2015

AbstractThe reduction of cupric ion in ammonia solution by aqueous sulfur dioxide was studied. Each run was carried out at constant initial cupric concentration, stirred rate and total mixed gas flow rate. The effect of temperature, partial pressure of sulfur dioxide in gas phase and cupric ion concentration of the solution was investigated.The reaction of Cu3++SO2(aq.)→Cu++SO42− was carried out by bubbling mixed gas (SO2/N2) through the aqueous ammonia complex of copper (II). The color change for the system was from deep blue, green, yellow to white. The pH values in the system changed from 10 to 4. The product of the reaction was identified by the analyses of IR spectrum and X‐ray diffraction, having the formula of 7Cu2SO3· 2CuSO3·3(NH4)2SO3·24H2O.The kinetic model of the reduction was proposed as:–d[Cu2+]/dt = k exp(–E/RT)[Cu2+]α[SO2%]According to the experiments, the parameters were determined as:α=1.64±0.03, þ=1.20, E=13.7 Kcal/mol and k = (1.77±0.20)×1010 (g‐equ./ℓ)−0.64min−2.
Studies of Orcein and Its Metal Complexes I. Spectral Behaviour of Orcein. Medium Effect and Ionisation Constants
Authors: Issa R.M. , Abu‐El‐Wafa S.M. 
Published: June 2015

AbstractThe electronic absorption spectrum of orcein is studied in organic solvent of varied polarities and water‐organic solvent mixtures with different pH. The absorption bands are assigned and the effect of solvent polarity on their position is discussed. The pka of the acid‐base equilibria set are determined and commented upon in relation to nature and proportion of the organic solvent added. The main bands of the ir spectrum and signals of the 1H nmr spectrum are as well discussed. The mixing of orcein with transition metal ions leads to drastic changes in colour and hence the visible absorption spectra of both organic compound and metal ions.
Coordination of Y(III), Ce(III), La(III) and Zr(IV) with Some Salicylidene Aromatic Schiff Bases
Authors: El‐Haty M. T. , Adam F. A. , Abdalla Nadia A. 
Published: June 2015

AbstractCoordination compounds formed by the interaction of some salicylidene aromatic Schiff bases with Y(III), Ce(III), La(III), and Zr(IV) are prepared and characterized by elemental analysis, electronic and i.r. spectra as well as conductometric methods. The i.r. spectra indicate that coordination takes place through the azomethine nitrogen atoms and OH groups. The structure of such products depend mainly on the type of Schiff base used. Also, the formation constant of the complexes are evaluated.
A General and Improved Preparation of Monoketals of Symmetrical Diketones with Polymeric Protecting Reagent
Authors: Chou Ta‐Shue , Shih Yun‐Er 
Published: June 2015

AbstractMonoprotection of symmetrical diketones could be accomplished by using polymeric supported 1,2‐diol by monoketalization of only one of the carbonyl groups. These monoprotected diketones could then undergo different types of reactions leading to selective synthesis on one ketone group only.
Some Aspects on Preconcentration for Neutron Activation Analysis
Authors: Yeh Si Jung , Lo Jem Mau , Wang E. L. 
Published: June 2015

AbstractA preconcentration method incorporated with neutron activation analysis was developed for the accurate determination of trace metals in biological and environmental samples. Bismuth diethyldithiocarbamate, thallium diethyldithiocarbarnate, and ammonium pyrrolidinedithiocarbamate were used as the preconcentration agents for three groups of metals. Trace metals were enriched and interfering elements such as Na, Br, P. K. etc. were removed simultaneously during the preconcentration process so that the sensitivity for each metal was greatly improved. Optimal conditions for sample digestion, group preconcentration of trace metals and neutron activation analysis of biological and environmental samples were discussed.
Reactions of 3, 5‐Dimethyl‐4‐Carbethoxy‐2‐Cyclohexen‐1‐One at α‐Position
Authors: Rahman A. U. , Khan M. Y. 
Published: June 2015

Abstract3, 5‐Dimethyl‐4‐carbethoxy‐2‐cyclohexen‐1‐one has been synthesized through the Knoevenagel condensation1, which is then subjected to alkylation and acylation at α‐position. The resulting products are hydrolyzed and decarboxylated to α‐substituted cyclohexenones. 3, 5‐Dimethyl‐2‐cyclohexen‐1‐one is converted by N‐bromosuccinimide to phenol via enolization2.
The Oxidation and Reduction of 4‐Formyl‐and 4‐Acetyl‐3‐Arylsydnones
Authors: Tien Hsien‐Ju , Yeh Mou‐Yung , Wu Chung‐Hsiung , Chen Hsien‐Tsung 
Published: June 2015

AbstractA convenient method to prepare methyl 3‐arylsydnonylacetate (I) from 4‐acetyl‐3‐arylsydnone with thallium (III) nitrate by oxidative rearrangement was investigated.4‐Formyl‐3‐arylsydnones were reduced by sodium borohydride at room temperature to produce 4‐hydroxymethyl‐3‐arylsydnones (II) in moderate yields (65%‐85%), but the corresponding 3‐aryl‐4‐sydnonecarboxaldehyde arylhydrazone (III) was obtained by the electrolytic reduction.
A Convenient Synthesis of N‐Substituted 1,6‐Dihydro‐3(2H)‐Pyridinones
Authors: Chen Ling‐Ching , Wang Eng‐Chi , Lin Jen‐Hom , Wu Shihn‐Sheng 
Published: June 2015

AbstractN‐Substituted 1,6‐dihydro‐3(2H)‐pyridinones have been synthesised from N‐substituted piperidine‐3,5‐diones via the methyl enol ethers. Reduction of the latter with sodium borohydride (NaBH4) is described.
Synthesis of Methyl‐2, 3‐Di‐O‐Methyl 6‐Deoxy‐3‐C‐Methyl‐a‐D‐Gulopyranoside
Authors: Rahman A. U. , Hong N. , Yoshimura J. 
Published: June 2015

AbstractMethyl 2,2‐di‐O‐methyl‐6‐C‐methyl‐α‐D‐gulopyranoside has been synthesized from D‐glucose. The introduction of methyl branching at 3‐position was achieved by the Grignard reaction.
Synthesis of Some Dialkyl Bromo‐Substituted Benzyl Phosphonates
Authors: Liaw Ben‐Ruey , Guo Wen‐Jeng 
Published: June 2015

AbstractArbuzov reaction of bromo‐substituted benzyl bromides and trialkyl phosphites in benzene gave high yields of dialkyl bromo‐substituted benzyl phosphonates, and —CH2CH2CH2CH3). The structural assignments of these phosphonates were confirmed by 1H nmr, 13C nmr, ir and mass spectral analysis.
Some Reactions of 5‐(3 or 4‐Pyridyl)‐1,3,4‐Oxadiazoles with Amines and Hydrazines
Authors: Zayed S. A. , Fakhr I. E. , Gad F. A. , Abdulla A. 
Published: June 2015

Abstract2‐Amino‐and 2‐hydrazino‐5‐(3 or 4‐pyridyl)‐1, 3, 4‐oxadiazoles [IIi‐k] have been prepared by racting 2‐chloro derivatives with the corresponding amines or hydrazines, the 2‐hydrazino (IIi‐k) compounds that obtained were heated with carbon disulphide and alcoholic potassium hydroxide where 5‐(3 or 4‐pyridyl)‐1,3,4‐oxadiazolo (2,3‐C)‐1,2,4‐triazole 5‐thione (IIIa‐c) were obtained, the given structures were biologically screened.
A Study of the Nitroso Spin Adducts of the Pentacarbonyl Rhenium Radical
Authors: Chen H. S. , Chen C. P. 
Published: June 2015

AbstractNitrosobenzene (NB) and nitroso‐tetr‐butane (NtB) were used to trap the photogenerated rhenium pentacarbonyl radical. Self trapped radicals and spin adducts were studied in detail by EPR spectroscopy. In methylene chloride, both nitroxide and anilino spin adducts can be observed with NtB at −30°. In contrast, only the nitroxide spin adduct of nitrosobenzene was observed in either hexane, or methylene chloride solution. This solvent controlled spin adduct chemistry, can be explained in terms of the solute‐solvent interaction.
Mössbauer Spectroscopic Studies of Supported α‐Fe2O3 and Fe Catalysts II: The Effect of the Second Metal Addition
Authors: Wei Ho‐Hsiang , Lin Kuen‐Hai 
Published: June 2015

AbstractThe effect of the addition of a second metals such as Zn and Ni on the calcinaton and reduction of alumina, magnesia and silicasupported iron catalysis with total iron loading of 5wt% is investigated by Mössbauer spectroscopy. It is shown that the reducibility of supported α‐Fe2O3 is gradually increased by adding the second metal. The values of the magnetic hyperfine field obtained from Mössbauer spectra for the Zn or Ni‐added α‐Fe2O3 or Fe catalysts decreased with increasing second metal loading.
Preparation of Enamines Catalyzed by Lewis Acids in the Presence of Solid Supports
Authors: Chou Shang‐Shing P. , Chu Cheng‐Wu 
Published: June 2015

AbstractA simple and effective preparation of enamines from bulky ketones and secondary amines has been achieved with the aid of Lewis acid on various solid supports. The optimized yields were higher than those obtained without the solid support. Factors affecting the yield and regioselectivity of these reactions were also studied. Evidence showed that the reaction proceeded simultaneously in solution and on the solid support.
Some Reactions of Chalcone‐4‐Sulfonyl Chloride and 4‐Methoxychalcone‐3‐Sulfonyl Chloride
Authors: Cremlyn Richard J. , Swinbourne Frederick J. , Shode Olufemi O. 
Published: June 2015

AbstractChalcone and 4‐methoxychalcone react with chlorosulfonic acid to give chalcone‐p‐sulfonyl chloride and 4‐methoxchalcone‐3‐sulfonyl chloride respectively. The sulfonyl chlorides were converted into 13 sulfonyl derivatives by reaction with nucleophiles. With hydrazine and phenylhydrazine the chalconesulfonyl chlorides were cyclised to the corresponding hydrazinopyrazolines. In contrast, with N,N‐dimethyl‐hydrazine only the dimethylsulfonohydmides were obtained, and no attack on the carbonyl group was observed. Possible reasons for this difference in behaviour are discussed, together with spectroscopic evidence for the structures proposed.
Synthesis of 1‐Acyl‐3‐Piperidones
Authors: Chen Ling‐Ching , Wang Eng‐Chi , Lin Jen‐Hom , Wu Shihn‐Sheng 
Published: June 2015

AbstractThe 1‐acyl‐3‐piperidones (5 and 8) have been synthesised from N‐benzylpiperidine‐3,5‐dione (1) via a reaction sequence, which is shown to be of general utility for the preparation of 1‐acyl‐3‐piperidones. The total yields of 5 and 8 obtained from 1 are 35% and 31% respectively.
Micelle‐Counterion Interaction, I. Critical Micelle Concentrations OF SDS Under the Influence of Copper Counterion
Authors: Su Shyh‐Gang , Chen Yie Lane , Mou Chung Yuan 
Published: June 2015

AbstractWe investigated the effect of counter ion (Cu2+) adsorption on Sodium Dodecylsulfate and Sodium Tetradecylsulfate micelle by three different techniques: surface tension decrease, copper‐selective electrode and electric conductivity. The effect of added copper ion on critical micelle concentration (CMC) was determined. The effectiveness of these three techniques was critically evaluated. It is concluded that copper ions are able to strongly displace Sodium ions from the micellar surface.
Carbonylation of Benzyl Halides Over Two‐Phase Catalyst of Iron Pentacarbonyl
Authors: Ou Chau‐Ban , Liu Ling‐Kang 
Published: June 2015

AbstractCarbonylation of benzyl halides to phenylacetic acid was studied in a two‐phase system with iron pentacarbonyl as the catalyst precursor. The solutions consisted of a benzyl halide and iron pentacarbonyl in benzene and tetrabutylammonium hydrogen sulfate in aqueous sodium hydroxide. Stirring under carbon monoxide readily produced phenylacetic salts in aqueous phase which were then acidified and extracted with ether. The yields of phenylacetic acid from benzyl iodide and from benzyl bromide were similar at a evel of about 50percnt;, that of the latter being higher by 1%. The yield from benzyl chloride was far less, at a level of only 21%. The rate as studied with gas chromatography was found to decrease in the order benzyl iodide>benzyl bromide>benzyl chloride.
A Study of the Human Urinary Steroid Metabolic Profile Using A DB‐1 Fused Silica Capillary Column
Authors: Sye Wen‐Fa , Cheng Chia‐Tsung 
Published: June 2015

AbstractThis paper reports the performance of a DB‐1 fused‐silica capillary column for analysis of mixtures of methoxime‐trimethylsilyl ether (MO‐TMS) derivatives of human urinary steroid extracts. DB‐1 is a non‐extractable bonded phase, equivalent in polarity to SE‐30 and OV‐1. In addition, a small reversed‐phase Sep‐Pak C18 cartridge is used for extraction of steroid conjugates from urine, and for the extraction of freed steroids liberated by hydrolysis. Examples of urinary steroid analysis in normal adult males and in patients with multiple myeloma using the DB‐1 bonded phase fused silica capillary column are described.