Gas Chromatographic Determination of Ethyl Alcohol in Blood for Medicolegal Purposes. Separation of Other Volatiles from Blood or Aqueous Solution.

1962 ◽  
Vol 34 (10) ◽  
pp. 1234-1236 ◽  
Author(s):  
K. D. Parker ◽  
C. R. Fontan ◽  
J. L. Yee ◽  
P. L. Kirk
Keyword(s):  
Aqueous Solution ◽  
Ethyl Alcohol ◽  
Chromatographic Determination

Rapid Thin Layer Chromatographic Determination of Aflatoxin M1 in Powdered Milk

1985 ◽  
Vol 68 (5) ◽  
pp. 952-954
Author(s):  
Maria Luisa Serralheiro ◽  
Maria Lurdes Quinta
Keyword(s):  
Aqueous Solution ◽  
Carbon Tetrachloride ◽  
Thin Layer ◽  
Limit Of Detection ◽  
Chromatographic Determination ◽  
Methanol Solution ◽  
Aflatoxin M1 ◽  
Powdered Milk ◽  
Layer Chromatography

Abstract A method has been developed for the detection of aflatoxin Mi in milk. The toxin is extracted with chloroform, the extract is evaporated, and the residue is partitioned between carbon tetrachloride and an aqueous saline-methanol solution. The toxin is once again extracted with chloroform from the methanol solution and analyzed by thin layer chromatography. The limit of detection of Mi in powdered milk is 0.5 μg/ kg; recoveries of added Mj are about 83%. The limit of detection can be improved to 0.3 μg/kg if the plate is sprayed with an aqueous solution of H2S04 after development.

Collaborative Study of the Gas-Liquid Chromatographic Determination of Sorbitol in Bakery Products

1973 ◽  
Vol 56 (1) ◽  
pp. 66-67
Author(s):  
Harvey K Hundley
Keyword(s):  
Aqueous Solution ◽  
Acetic Anhydride ◽  
Collaborative Study ◽  
Chromatographic Determination ◽  
Bakery Products ◽  
Sugar Alcohols ◽  
Flame Ionization ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A GLC method for the determination of sorbitol has been collaboratively studied. Sugar and sugar alcohols are extracted from the bakery products by methanol and the solvent is evaporated. Acetate derivatives are then formed by addition of acetic anhydride in pyridine, and the derivatives are extracted from an aqueous solution with chloroform and analyzed by flame ionization GLC. Collaborative results show a recovery ranging from 90 to 102% sorbitol from bakery products containing 1.5 to 7% sorbitol. The method has been adopted as official first action.

Gas Chromatographic Determination of Diethylstilbestrol Dimethyl Ether in Diethylstilbestrol

1972 ◽  
Vol 55 (1) ◽  
pp. 185-186
Author(s):  
F E Gainer ◽  
W J Chiasson
Keyword(s):  
Aqueous Solution ◽  
Dimethyl Ether ◽  
Chloroform Solution ◽  
Internal Standard ◽  
Chromatographic Determination ◽  
Detector Response ◽  
Chloroform Layer ◽  
Internal Standard Peak ◽  
Linear Plot

Abstract A GLC method is described for the determination of the dimethyl ether of diethylstilbestrol (DME) in diethylstilbestrol (DES). A 1 g sample of DES is dissolved in an aqueous solution of 0.5N NaOH and then extracted with a chloroform solution containing benefin, the internal standard. An aliquot of the chloroform layer is chromatographed and the DME peak is measured relative to the internal standard peak. The method was tested for accuracy within the 11–110 ppm range and a linear plot of detector response vs. concentration was obtained.

Gas chromatographic determination of amines in aqueous solution

1964 ◽  
Vol 13 ◽  
pp. 565-567 ◽  
Author(s):  
Yael Arad ◽  
Moshe Levy ◽  
Moshe Levy ◽  
David Vofsi
Keyword(s):  
Aqueous Solution ◽  
Chromatographic Determination

Liquid Chromatographic Determination of Amprolium in Chicken Tissues, Using Post-Column Reaction and Fluorometric Detection

1986 ◽  
Vol 69 (6) ◽  
pp. 941-943
Author(s):  
Tomoko Nagata ◽  
Masanobu Saeki
Keyword(s):  
Aqueous Solution ◽  
Reaction System ◽  
Chromatographic Determination ◽  
Fluorometric Detection ◽  
Alumina Column ◽  
Alumina Column Chromatography ◽  
Chicken Muscles ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A method is presented for determination of amprolium residues in chicken muscles by a liquid chromatographic post-column reaction system. The drug is extracted from muscles with methanol, and the extract is concentrated to 3-4 mL. This aqueous solution is rinsed with n-hexane and cleaned up by alumina column chromatography. The drug is separated from the interferences on a LiChrosorb RP-8 column, reacted with ferricyanide in alkaline solution, and quantitated by fluorometric detection at 367 nm (excitation) and 470 nm (emission). Recoveries of amprolium added to chicken muscles at levels of 0.1 and 0.2 ppm were 74.9 and 80.9%, respectively. The detection limit was 1 ng for amprolium standard and 0.01 ppm in chicken muscles.

Ion chromatographic determination of hydrolysis products of hexafluorophosphate salts in aqueous solution

2012 ◽  
Vol 714 ◽  
pp. 121-126 ◽  
Author(s):  
Lydia Terborg ◽  
Sascha Nowak ◽  
Stefano Passerini ◽  
Martin Winter ◽  
Uwe Karst ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Chromatographic Determination ◽  
Hydrolysis Products

Gas-Liquid Chromatographic Determination of 3-Trifluormethyl-4-nitrophenol Residues in Fish

1974 ◽  
Vol 57 (2) ◽  
pp. 387-388 ◽  
Author(s):  
John L Allen ◽  
Joe B Sills
Keyword(s):  
Aqueous Solution ◽  
Chromatographic Determination ◽  
Electron Capture Detection ◽  
Gas Liquid Chromatography ◽  
Fish Tissues ◽  
Fish Muscles ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic ◽  
Extracting Solvent

Abstract A procedure for the determination of 3-trifluormethyl-4-nitrophenol (TFM) in fish tissues is described. Homogenized tissues are extracted with hexane-ethyl ether; the extract is cleaned up by partitioning the TFM from the extracting solvent into 0.1N NaOH, acidifying the aqueous solution, and partitioning again with hexaneethyl ether. The TFM is methylated with diazomethane and analyzed by gas-liquid chromatography, using electron capture detection. Recoveries ranged from 75 to 100% from fish muscles that were spiked with 0.01—2.00 μg TFM/g.

Gas-Liquid Chromatographic Determination of Pentachlorophenol in Milk

1978 ◽  
Vol 61 (1) ◽  
pp. 214-216
Author(s):  
D Ronald Erney
Keyword(s):  
Aqueous Solution ◽  
Acetic Anhydride ◽  
Electron Capture ◽  
Potassium Carbonate ◽  
Chromatographic Determination ◽  
Carbonate Solution ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic ◽  
Potassium Carbonate Solution

Abstract A gas-liquid chromatographic (GLC) method developed by other workers for determining pentachlorophenol (PCP) in water has been adapted for determining PCP in raw and homogenized milk. PCP is extracted from milk with benzene and from the benzene into a potassium carbonate solution. Acetic anhydride is added to the aqueous solution to form PCP acetate, which is extracted into hexane and then determined by electron capture GLC. Duplicate determinations of PCP in milk fortified at levels of 0.02, 0.2, and 2.0 ppm gave respective average recoveries of 80.0, 87.2, and 85.0%. PCP levels as low as 0.005 ppm can be detected in 20 g milk.

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