Qualitative determination of false-positive effects in the acetylcholinesterase assay using thin layer chromatography

2003 ◽  
Vol 14 (3) ◽  
pp. 127-131 ◽  
Author(s):  
In K. Rhee ◽  
Richard M. van Rijn ◽  
Robert Verpoorte
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
False Positive ◽  
Positive Effects ◽  
Layer Chromatography ◽  
Qualitative Determination

Determination of the Substituted Urea Herbicides Linuron, Monuron, Diuron, Neburon, and Fenuron in Surface Waters

1966 ◽  
Vol 49 (2) ◽  
pp. 452-456
Author(s):  
Stanley E Katz
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Surface Waters ◽  
Quantitative Method ◽  
Layer Chromatography ◽  
Qualitative Determination ◽  
Substituted Urea

Abstract A quantitative method has been developed for the substituted urea herbicides in surface waters. The herbicide is extracted from water with chloroform and hydrolyzed under reflux conditions with 6N HCl. The resulting aniline is diazotized and condensed with N-(l-naphthyl) ethylenediamine to form a magenta dye, which is extracted with n-butanol and measured colorimetrically at 555 μ. Qualitative determination is made by thin layer chromatography. The herbicide is extracted from water with chloroform, and the volume is reduced. After development, the chromatograms are sprayed with ninhydrin and visualized.

Qualitative Determination of Coal Tar Dyes in Alcoholic Products by Thin Layer Chromatography

1974 ◽  
Vol 57 (1) ◽  
pp. 217-218
Author(s):  
Glenn E Martin ◽  
Donald M Figert
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Coal Tar ◽  
Distilled Spirits ◽  
Layer Chromatography ◽  
Qualitative Determination

Abstract Thin layer chromatography can be used to determine coal tar dyes in alcoholic products. Hie dyes most commonly found in distilled spirits are FD&C Yellow No. 5, FD&C Red No. 2, and FD&C Red No, 4.

Qualitative Determination of Sulfa Drugs in Medicated Feeds by Thin-Layer Chromatography

1965 ◽  
Vol 48 (2) ◽  
pp. 278-279
Author(s):  
Leland R Alexander ◽  
Eugene R Stanley
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Acidic Solution ◽  
Basic Solution ◽  
The Individual ◽  
Layer Chromatography ◽  
Medicated Feeds ◽  
Chromogenic Agent ◽  
Qualitative Determination

Abstract Sulfacetamide, sulfadiazine, sulfaquinoxaline, sulfamerazine, sulfamethoxypyridazine, sulfamethazine, and sulfanilamide are extracted from a medicated feed with acetone. The acetone is evaporated, the residue is taken up in basic solution, and the interfering material is extracted from the basic solution with chloroform. The basic solution is then made acidic and evaporated to dryness. The sulfas are extracted from the residue with acetone, separated, and identified by thin-layer chromatography. Methanol-chloroform (3 + 7) is used as mobile solvent; an acidic solution of dimethylaminobenzaldehyde in ethanol is used as the chromogenic agent. The method easily detects and identifies 1 μg of the individual sulfas.

scholarly journals Qualitative determination of Plasticizers in lacquer by thin layer chromatography

1965 ◽  
Vol 38 (7) ◽  
pp. 312-314
Author(s):  
Motonobu KASAHARA ◽  
Osamu KINOSHITA ◽  
Akira SHIBATANI ◽  
Hatue TAKAHASHI
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Layer Chromatography ◽  
Qualitative Determination
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