Gas-Liquid Chromatographic Headspace Technique for Determination of Vinyl Chloride in Corn Oil and Three Food-Simulating Solvents

1977 ◽  
Vol 60 (3) ◽  
pp. 570-575 ◽  
Author(s):  
Gregory W Diachenko ◽  
Charles V Breder ◽  
Margaret E Brown ◽  
J Lawrence Dennison
Keyword(s):  
Acetic Acid ◽  
Vinyl Chloride ◽  
Polyvinyl Chloride ◽  
Corn Oil ◽  
Ionization Detector ◽  
Residual Monomer ◽  
Liquid Chromatograph ◽  
Flame Ionization ◽  
Liquid Chromatographic

Abstract A gas-liquid chromatographic headspace technique for the determination of vinyl chloride (VC) in com oil, 50% ethanol, 3% acetic acid, and n-heptane is described. These food-simulating solvents and the corn oil are placed in septum-sealed bottles and heated to 90°C, and aliquots of headspace vapor are injected into a gas-liquid chromatograph equipped with a flame ionization detector. VC may be quantitated at concentrations of 1 ppb or less. This technique was used to measure the migration of VC into corn oil and 50% ethanol from 2 unplasticized polyvinyl chloride sheets containing 0.28 and 0.44 ppm residual monomer.

Gas-Liquid Chromatographic Determination of Vinyl Chloride in Vinyl Chloride Polymers, Food-Simulating Solvents, and Other Samples

1975 ◽  
Vol 58 (6) ◽  
pp. 1214-1220 ◽  
Author(s):  
Charles V Breder ◽  
J Lawrence Dennison ◽  
Margaret E Brown
Keyword(s):  
Vinyl Chloride ◽  
Vegetable Oils ◽  
Direct Injection ◽  
Chromatographic Determination ◽  
Gas Liquid Chromatography ◽  
Liquid Chromatograph ◽  
Flame Ionization ◽  
Dimethyl Acetamide ◽  
Liquid Chromatographic

Abstract The determination of vinyl chloride (VC) in polyvinyl chloride (PVC), vegetable oils, foodsimulating solvents, mouthwashes, and blood anticoagulant solutions by gas-liquid chromatography is described. PVC polymers are dissolved in either tetrahydrofuran or dimethyl acetamide. Vegetable oils are diluted with an equal volume of tetrahydrofuran. The resulting solutions are injected into a gas-liquid chromatograph equipped with a flame ionization detector. Mouthwashes, blood anticoagulant solutions, and 3 food-simulating solvents, 3% acetic acid, 50% ethanol, and heptane, are analyzed by direct injection into a chromatograph. Sensitivities are such that 0.05 ppm VC in solution or 1 ppm VC in PVC can be quantitated.

scholarly journals Determination of Dyclonine Hydrochloride by a HPLC Method and Camphor and Menthol by a GC Method in Compound Lotion

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Suying Ma ◽  
Haixia Lv ◽  
Xiaojun Shang
Keyword(s):  
Retention Time ◽  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Reversed Phase ◽  
Hplc Method ◽  
Ionization Detector ◽  
Uv Detector ◽  
Flame Ionization ◽  
Liquid Chromatographic

A high performance liquid chromatographic (HPLC) method with UV detector for the determination of dyclonine hydrochloride and a gas chromatography (GC) method with flame ionization detector (FID) for the determination of camphor and menthol in lotion were developed. The developed HPLC method involved using a SinoChoom ODS-BP C18reversed-phase column (5 μm, 4.6 mm × 200 mm) and mobile phase consisting of acetonitrile : water : triethylamine in a ratio of 45 : 55 : 1.0; pH was adjusted to 3.5 with glacial acetic acid. The developed GC method for determination of camphor and menthol involved using an Agilent 19091J-413 capillary chromatographic column (30 m × 320 μm × 0.25 μm). The two methods were validated according to official compendia guidelines. The calibration of dyclonine hydrochloride for HPLC method was linear over the range of 20–200 μg/mL. The retention time was found at 6.0 min for dyclonine hydrochloride. The calibration of camphor and menthol of GC method was linear over the range of 10–2000 μg/mL. The retention time was found at 2.9 min for camphor and 3.05 min for menthol. The proposed HPLC and GC methods were proved to be suitable for the determination of dyclonine hydrochloride, camphor, and menthol in lotion.

Gas-Liquid Chromatographic Determination of IV-Octylbicycloheptene Dicarboximide

1975 ◽  
Vol 58 (4) ◽  
pp. 845-849
Author(s):  
Vernon J Meinen
Keyword(s):  
Quantitative Determination ◽  
Chromatographic Determination ◽  
Flame Ionization Detector ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Preliminary Work ◽  
Technical Material ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A gas-liquid chromatographic (GLC) method is described for the quantitative determination of /V-octylbicycloheptene dicarboximide (MGK 264 synergist) in technical materials and in various formulations. The samples are diluted with acetone and analyzed by GLC, using a flame ionization detector and a column packed with OV-1 on Chromosorb W (HP). Preliminary work indicates that satisfactory results can be obtained with the technical material and several different formulations.

Gas-Liquid Chromatographic Determination of Sorbitol in Cooked Sausage Products

1978 ◽  
Vol 61 (1) ◽  
pp. 164-166
Author(s):  
Fred A Moseley ◽  
Joel S Salinsky ◽  
Robert W Woods
Keyword(s):  
Chromatographic Determination ◽  
Flame Ionization Detector ◽  
Gas Chromatograph ◽  
Ionization Detector ◽  
Simple Method ◽  
Flame Ionization ◽  
Freeze Dried ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A rapid and simple method of analysis has been developed for sorbitol in cooked sausage products. Sorbitol is extracted from cooked sausage products with water, an aliquot of the extract is freeze-dried, and the trimethylsilyl (TMS) derivative of sorbitol is formed. An aliquot of the TMS-sorbitol is injected into a gas chromatograph and measured by a flame ionization detector. Analysis of fortified samples shows that the recovery compares well with known amounts of sorbitol added.

Gas-Liquid Chromatographic Determination of Acephate and Ortho 9006 Residues in Crops

1974 ◽  
Vol 57 (1) ◽  
pp. 189-191
Author(s):  
James B Leary
Keyword(s):  
Gas Chromatography ◽  
Chromatographic Method ◽  
Chromatographic Determination ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Ether Solution ◽  
Liquid Chromatographic Determination ◽  
Gas Chromatographic Method ◽  
Liquid Chromatographic

Abstract A gas chromatographic method is described for determining acephate (O,S-dimethyl acetylphosphoramidothioate) and a metabolite, Ortho 9006 (O,S-dimethyl phosphoramidothioate), in a variety of crops. After extraction of the sample with ethyl acetate, the solvent is evaporated, and an ether solution of the residue is passed through a silica gel column to remove interferences. Acephate and Ortho 9006 are eluted from the column with 10% methanol in ether and measured simultaneously by programmed temperature gas chromatography, using an alkali flame ionization detector.

Gas-Liquid Chromatographic Determination of Levamisole Residues in Bovine Milk

1976 ◽  
Vol 59 (5) ◽  
pp. 954-958 ◽  
Author(s):  
John E Smith ◽  
N Robert Pasarela ◽  
John C Wyckoff
Keyword(s):  
Bovine Milk ◽  
Chromatographic Determination ◽  
Ionization Detector ◽  
Flame Ionization ◽  
External Standard ◽  
Liquid Chromatographic Determination ◽  
Control Milk ◽  
Water Saturated ◽  
Liquid Chromatographic

Abstract A gas-liquid chromatographic (GLC) method is described for determining residues of levamisole, (1-)-(2,3,5,6-tetrahydro-6-phenylimidazo[2,1-b] thiazole), in milk. Levamisole is extracted from an alkaline milk sample with water-saturated ethyl acetate. After co-extractives are removed by various partitionings, the levamisole concentration is measured by GLC by using an alkali (RbSO4) flame ionization detector, vs. an external standard. This method is satisfactory for determining levamisole residues as low as 0.01 ppm in bovine milk. Apparent residues in control milk samples averaged <0.001 ppm. Recoveries of 0.01–2.0 ppm added levamisole ranged from 86.5 to 113%. Animals treated with various Tramisol® formulations showed apparent levamisole residues below the validated sensitivity of the method (0.01 ppm) at sampling periods exceeding 48 hr.

Gas-Liquid Chromatographic Determination of Morphine, Heroin, and Cocaine

1979 ◽  
Vol 62 (2) ◽  
pp. 304-307
Author(s):  
Manfred J Prager ◽  
Shirley M Harrington ◽  
Thomas F Governo
Keyword(s):  
Chromatographic Determination ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Accuracy And Precision ◽  
Forensic Samples ◽  
Glass Column ◽  
Computer Based ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract Morphine, heroin, and cocaine are quantitatively determined with the same gas-liquid chromatographic system. The compounds are separated on a 6 ft × 2 mm id glass column packed with a 1:1 mixture of 5% SE-30 on 80-100 mesh Chromosorb W and 3% OV-17 on 80-100 mesh Varaport 30. The column is temperatureprogrammed. Flame ionization detector responses are measured with a computer-based data system. Heroin and cocaine are chromatographed directly; morphine is derivatized first. The procedure was evaluated with previously analyzed commercial and forensic samples. Accuracy and precision were 5 and 3%, respectively.

Gas-Liquid Chromatographic Determination of d-trans-Allethrin

1972 ◽  
Vol 55 (5) ◽  
pp. 907-912
Author(s):  
Vernon J Meinen
Keyword(s):  
Chromatographic Method ◽  
Chromatographic Determination ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Technical Material ◽  
Aoac Method ◽  
Liquid Chromatographic Determination ◽  
Gas Chromatographic Method ◽  
Liquid Chromatographic

Abstract A gas chromatographic method is described for the quantitative determination of d-trans-allethrin in the technical product and in various formulations. The samples are diluted with acetone and analyzed by gas chromatography, using a flame ionization detector and a column packed with OV-1 on Chromosorb W (HP). Preliminary work indicates that satisfactory results can be obtained with the technical material and several different formulations. Since this method is more rapid and specific than the present AOAC titrimetric method, it is expected that it will be a valuable supplement to or alternative for the AOAC method for the analysis of allethrin.

Gas-Liquid Chromatographic Method for the Determination of Isomeric Purity of Butylated Hydroxyanisole

1970 ◽  
Vol 53 (6) ◽  
pp. 1179-1181
Author(s):  
F P Mahn ◽  
V Viswanathan ◽  
C Plinton ◽  
V S Venturella ◽  
B Z Senkowski
Keyword(s):  
Internal Standard ◽  
Assay Method ◽  
Butylated Hydroxyanisole ◽  
Gas Chromatograph ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Liquid Chromatographic Method ◽  
Hydrogen Flame ◽  
Liquid Chromatographic

Abstract An assay method was investigated for the determination of the ratio of 2- and 3-isomers in butylated hydroxyanisole. The developed procedure involves dilution of the sample with acetone and injection into a gas chromatograph equipped with a hydrogen flame ionization detector. Diphenylamine is a suitable internal standard. XE–60 liquid phase effected an excellent resolution of the 2- and 3-isomers and diphenylamine. The method is quantitative and rapid; the chromatogram is completed in approximately 20 min.

Gas-chromatographic quantitation of theophylline in small volumes of plasma.

1976 ◽  
Vol 22 (6) ◽  
pp. 898-900 ◽  
Author(s):  
D Perrier ◽  
E Lear
Keyword(s):  
Coefficient Of Variation ◽  
Plasma Concentrations ◽  
Plasma Samples ◽  
Ionization Detector ◽  
Liquid Chromatograph ◽  
Blood Samples ◽  
Rapid Procedure ◽  
Flame Ionization ◽  
Heel Prick

Abstract We describe a rapid procedure for quantitating theophylline in 100-mul plasma samples by use of a gas-liquid chromatograph equipped with a flame ionization detector. This methos is especially useful for monitoring theophylline concentrations in serum or plasma of infants, because sufficiently large blood samples can be readily obtained from a heel prick. The method is specific for theophylline in the presence of caffeine, theobromine and phenobarbital. For plasma concentrations equal to or greater than 5 mg/liter the average daily coefficient of variation was less than 7% while the coefficient of variation from day to day was less than 11%. The same approach can also be used to measure concentrations of phenobarbital in small volumes of plasma or serum, and is readily adapted to determination of theophylline and phenobarbital in larger samples.

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