The thin-layer chromatographic determination of triazine herbicides in soil and water

The Analyst ◽  
1965 ◽  
Vol 90 (1071) ◽  
pp. 356 ◽  
Author(s):  
D. C. Abbott ◽  
J. A. Bunting ◽  
J. Thomson
Keyword(s):  
Thin Layer ◽  
Chromatographic Determination ◽  
Triazine Herbicides ◽  
Soil And Water

General Method for Determination of Pesticide Residues in Samples of Plant Origin, Soil, and Water. II. Thin Layer Chromatographic Determination

1981 ◽  
Vol 64 (3) ◽  
pp. 743-748 ◽  
Author(s):  
Árpád Ambrus ◽  
Éva Hargitai ◽  
Gabriella Károly ◽  
András Fülöp Ambrus ◽  
János Lantos Ambrus
Keyword(s):  
Thin Layer ◽  
Pesticide Residues ◽  
Unknown Origin ◽  
Chromatographic Determination ◽  
Plant Origin ◽  
Coefficients Of Variation ◽  
Rf Values ◽  
Soil And Water ◽  
General Method

Abstract o-Tolidine plus KI, p-nitrobenzene-diazoniumfluoroborate, bioassay with fungi and enzyme sources, AgNO3 plus UV radiation, and p-dimethyl-aminobenzaldehyde modes of detection have been selected for TLC screening of pesticide residues in extracts of samples of unknown origin. Single solvents were used for the elution. Coefficients of variation of Rf values were studied as a function of Rf and eluants. Indicator compounds were used for controlling the proper conditions of detection. The detectability of 188 pesticide compounds was tested, and the minimum detectable amounts were determined.

High-performance thin-layer chromatographic determination of rosiglitazone in its dosage form

2002 ◽  
Vol 15 (3) ◽  
pp. 192-195 ◽  
Author(s):  
Ramesh Sane ◽  
Mary Francis ◽  
Atul Moghe ◽  
Sachin Khedkar ◽  
Ajit Anerao
Keyword(s):  
Thin Layer ◽  
High Performance ◽  
Dosage Form ◽  
Chromatographic Determination

Improved thin-layer chromatographic determination of phospholipids in gastric aspirate from newborns, for assessment of lung maturity.

1988 ◽  
Vol 34 (4) ◽  
pp. 736-738 ◽  
Author(s):  
D Serrano de la Cruz ◽  
E Santillana ◽  
A Mingo ◽  
G Fuenmayor ◽  
A Pantoja ◽  
...  
Keyword(s):  
Thin Layer ◽  
Fetal Lung ◽  
Chromatographic Determination ◽  
Solvent Mixture ◽  
Gastric Aspirate ◽  
One Dimensional ◽  
Acetic Acid Water ◽  
Chromatographic Resolution ◽  
Lung Maturity

Abstract This one-dimensional thin-layer chromatographic method is used for assay of phospholipids in the gastric aspirate of newborns. The solvent mixture (chloroform/hexane/methanol/glacial acetic acid/water, 12/7/4/3/0.3 by vol) completely resolves lecithin, sphingomyelin, phosphatidylinositol, phosphatidylserine, phosphatidylethanolamine, and phosphatidylglycerol. The method is simple, precise, inexpensive, and rapid (chromatographic development takes less than 25 min) and gives high chromatographic resolution. We used this method to determine the lecithin/sphingomyelin densitometric ratio (L/S ratio) and the phosphatidylglycerol percentage in 200 samples of gastric aspirate and found an L/S ratio of 2.5 to be a satisfactory cutoff value for distinguishing fetal lung maturity and immaturity. We confirmed that the presence of phosphatidylglycerol excluded the possibility of respiratory distress.

Quantitative thin-layer chromatographic determination of bromide(1-) residues in crops after soil treatment by methyl bromide

1979 ◽  
Vol 27 (1) ◽  
pp. 132-134 ◽  
Author(s):  
Luc A. Gordts ◽  
Andre Vandezande ◽  
Pieter P. Van Cauwenberge ◽  
Willy Van Haver
Keyword(s):  
Thin Layer ◽  
Methyl Bromide ◽  
Chromatographic Determination ◽  
Soil Treatment

Thin Layer Chromatographic Determination of Subsidiary Dyes in D&C Red No. 19 and D&C Red No. 37

1974 ◽  
Vol 57 (4) ◽  
pp. 961-962
Author(s):  
Sandra Bell
Keyword(s):  
Thin Layer ◽  
Silica Gel ◽  
Chromatographic Method ◽  
Chromatographic Determination

Abstract A thin layer chromatographic method is presented by which triethylrhodamine and other lower ethylated subsidiary colors are separated from D&C Red No. 19 and D&C Red No. 37. After removal from the plate, subsidiary dyes are extracted from silica gel C adsorbent and quantitated spectrophotometrically. Recoveries of 1, 2, and 5% of added triethylrhodamine ranged from 89 to 1 0 3% for D&C Red No. 19 and from 85 to 1 0 2% for D&C Red No. 37.

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.

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