A solid-phase extraction-thin-layer chromatographic-fiber optical scanning densitometric method for determination of flavonol aglycones in extracts of rose leaves

2005 ◽  
Vol 18 (106) ◽  
pp. 437-442 ◽  
Author(s):  
Renata Nowak ◽  
Tomasz Tuzimski
Keyword(s):  
Solid Phase Extraction ◽  
Thin Layer ◽  
Solid Phase ◽  
Phase Extraction ◽  
Optical Scanning ◽  
Fiber Optical

scholarly journals Thin-Layer Chromatographic Determination of Monensin in Feeds: Screening Method

1998 ◽  
Vol 81 (4) ◽  
pp. 844-847 ◽  
Author(s):  
Wynne W Landgraf ◽  
P Frank Ross
Keyword(s):  
Solid Phase Extraction ◽  
Thin Layer ◽  
Solid Phase ◽  
Screening Method ◽  
Chromatographic Determination ◽  
Phase Extraction ◽  
Color Development ◽  
Layer Chromatography ◽  
Positive Results

Abstract Monensin is extracted from feed with methanol and purified by solvent-partitioning solid-phase extraction. After solvent reduction, monensin is separated by thin-layer chromatography on silica gel and visualized by color development with vanillin. No false-positive results were obtained in validation studies by submitting or peer laboratories when blank samples were analyzed. Three of 20 samples spiked with 5 ppm monensin were reported as containing no monensin. All samples spiked with 10 ppm monensin were reported positive for monensin.

Determination of sulfonamides and trimethoprim in spiked water samples by solid-phase extraction and thin-layer chromatography

2005 ◽  
Vol 18 (106) ◽  
pp. 423-426 ◽  
Author(s):  
Sandra Babić ◽  
Danijela Ašperger ◽  
Dragana Mutavdžić ◽  
Alka Horvat ◽  
Marija Kaštelan-Macan
Keyword(s):  
Solid Phase Extraction ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Water Samples ◽  
Solid Phase ◽  
Phase Extraction ◽  
Layer Chromatography
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