Chromatography of mycotoxins on precoated reverse-phase thin-layer plates

1989 ◽  
Vol 18 (3) ◽  
pp. 327-330 ◽  
Author(s):  
D. Abramson ◽  
T. Thorsteinson ◽  
D. Forest
Keyword(s):  
Thin Layer ◽  
Reverse Phase

Separation of Barbiturates Using Reverse-Phase Thin-Layer Chromatography

1980 ◽  
Vol 16 (2) ◽  
pp. 219-221 ◽  
Author(s):  
William Bress ◽  
Kenneth Ziminski ◽  
Walter Long ◽  
Thomas Manning ◽  
Leslie Lukash
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Reverse Phase ◽  
Layer Chromatography

scholarly journals Synthesis of 4-aryloxy-7-nitrobenzofurazan derivatives from 4-chloro-7-nitrobenzofurazan and various phenoxide anions (including pharmaceuticals) in the presence of crown ethers

2003 ◽  
Vol 1 (3) ◽  
pp. 260-276 ◽  
Author(s):  
Marioara Bem ◽  
Miron Caproiu ◽  
Dan Stoicescu ◽  
Titus Constantinescu ◽  
Alexandru Balaban
Keyword(s):  
Thin Layer ◽  
Nucleophilic Substitution ◽  
Thin Layer Chromatography ◽  
Crown Ethers ◽  
Nmr Spectra ◽  
Reverse Phase ◽  
Layer Chromatography

Abstract4-Chloro-7-nitrobenzofurazan reacts by nucleophilic substitution with phenoxide anions derived from estriol (2c), ethynylestradiol (2d), phenol (3e), guaiacol (3f), 2,6-dimethoxyphenol (3g), eugenol (3h), isoeugenol (3i), the cytostatic Etoposide (4), and Reichardt’s betaine (5) in the presence of crown ethers affording the corresponding 4-aryloxy-7-nitrobenzofurazan derivatives 6c, 6d, 7e-7i, 8, and 9. The structure of these compounds was confirmed by NMR spectra. Hydrophobicity/hydrophilicity parameters were investigated by reverse phase thin-layer chromatography.

scholarly journals Reverse Phase Thin Layer Chromatography of Aminoalkanethiosulfuric Acids, Mercaptoalkanamines and Aminoalkyl Disulfides

2002 ◽  
Vol 3 (7) ◽  
pp. 755-763 ◽  
Author(s):  
Maria Das Graças Cardoso ◽  
David Nelson ◽  
Antônia Tavares do Amaral ◽  
Custódio Dos Santos ◽  
Alcilene De Abreu Pereira ◽  
...  
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Reverse Phase ◽  
Layer Chromatography

Quantitation of Ochratoxin A: Use of Reverse Phase Thin-Layer Chromatography for Sample Cleanup Followed by Liquid Chromatography or Direct Fluorescence Measurement

1988 ◽  
Vol 71 (5) ◽  
pp. 949-953 ◽  
Author(s):  
Andrzej A Frohlich ◽  
Ronald R Marquardt ◽  
Aniko Bernatsky
Keyword(s):  
Liquid Chromatography ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Ochratoxin A ◽  
Uv Light ◽  
Packed Column ◽  
Fluorescence Measurement ◽  
Reverse Phase ◽  
Direct Fluorescence ◽  
Layer Chromatography

Abstract An improved procedure for sample preparation and quantitation of ochratoxin A in moldy grain was developed. Grain samples were acidified and extracted, and extracts were subjected to reverse phase thin-layer chromatography (RPTLC). The separated spots, which were identified under UV light, were scraped and collected into recovery devices. Ochratoxin A was eluted from the adsorbent and analyzed by either liquid chromatography with fluorescence detection or direct spectrofluorometric measurement. The method yielded values that were proportional to the concentrations of toxin in the sample, had relatively high levels of recovery (94%), and required considerably less volume of solvents and preparation time than a standard packed column method.

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