Pyrolysis-gas chromatographic determination of organics in aqueous solution

1968 ◽  
Vol 40 (8) ◽  
pp. 1365-1367 ◽  
Author(s):  
Ihor. Lysyj ◽  
Kurt H. Nelson
Keyword(s):  
Aqueous Solution ◽  
Chromatographic Determination ◽  
Pyrolysis Gas

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.

Pyrolysis gas chromatographic determination of arylsulfonic acids and salts

1970 ◽  
Vol 42 (14) ◽  
pp. 1719-1724 ◽  
Author(s):  
Sidney. Siggia ◽  
Lee R. Whitlock ◽  
Lee R. Whitlock
Keyword(s):  
Chromatographic Determination ◽  
Pyrolysis Gas

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
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