Semiquantitative determination of the mycotoxin sterigmatocystin on thin-layer chromatograms with a gray scale

1975 ◽  
Vol 275 (1) ◽  
pp. 30-30 ◽  
Author(s):  
J�rgen Rei�
Keyword(s):  
Thin Layer ◽  
Gray Scale ◽  
Semiquantitative Determination

Semiquantitative determination of alkaloids by circular thin-layer chromatography

1969 ◽  
Vol 57 (3) ◽  
pp. 449-455 ◽  
Author(s):  
Manzur-ul-Haque Hashmi ◽  
Shahnaz Parveen ◽  
N. A. Chughtai
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Semiquantitative Determination ◽  
Layer Chromatography

Collaborative Study of a Method for the Determination of Ochratoxin A in Green Coffee

1975 ◽  
Vol 58 (2) ◽  
pp. 258-262 ◽  
Author(s):  
Colette P Levi
Keyword(s):  
Thin Layer ◽  
Ochratoxin A ◽  
Collaborative Study ◽  
Green Coffee ◽  
Average Recovery ◽  
Semiquantitative Determination ◽  
Chromatographic Methods ◽  
Green Coffee Beans ◽  
Coffee Beans

Abstract A method for the semiquantitative determination of ochratoxin A in green coffee has been studied collaboratively by 11 laboratories. The average recovery for the 7 samples spiked at 3 levels of ochratoxin A was 69.1%, ranging from 60.5 to 85.6%. This is comparable to other visual thin layer chromatographic methods of mycotoxin detection. The method has been adopted as official first action for the determination of ochratoxin A in green coffee beans.

Thin-Layer Chromatographic Determination of Carbaryl (Sevin) in Some Foods

1965 ◽  
Vol 48 (4) ◽  
pp. 736-738
Author(s):  
Josephine M Finocchiaro ◽  
Walter R Benson
Keyword(s):  
Aluminum Oxide ◽  
Thin Layer ◽  
Chromatographic Method ◽  
Chromatographic Determination ◽  
Semiquantitative Determination

Abstract A thin-layer chromatographic method is described for the semiquantitative determination of the insecticide carbaryl. Acceptable recoveries ranging from 0.05 to 0.2 ppm have been obtained from nine crops. The Rf value of carbaryl ranged from 0.52 to 0.60 on aluminum oxide G plates.

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