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Thin-layer chromatography and ultraviolet spectrophotometry of mixtures of sulfonamides : Practical applications

✍ Scribed by Ugo.R. Cieri

Publisher
Elsevier Science
Year
1970
Tongue
English
Weight
897 KB
Volume
49
Category
Article
ISSN
1873-3778

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✦ Synopsis

A method is proposed for the analysis of mixed sulfonamides by thin-layer chromatography and ultraviolet spectrophotometry. Solutions of sample mixtures are spotted on fluorescent Silica Gel H plates and developed in chloroform-methanol (88:12). The developed spots are delineated under short-wave ultraviolet light, scraped from the plate and extracted with 0.1 N NaOH. The centrifuged extracts are read with a recording spectrophotometer. A new method of calculation is introduced which permits to calculate the recovery of each chromatogram and to derive from it the recoveries of the individual compounds.

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