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- W1983485175 abstract "A chromatographic procedure with precolumn derivatization to form the N-(1-naphthyl)ethylenediamine dihydrochloride azodyes is proposed for the analysis of several sulphonamides (sodium sulphacetamide, sulphadiazine, sulphaguanidine, sulphamerazine, sulphamethizole, sulphamethoxazole, sulphanilamide and sulphathiazole) in pharmaceutical preparations (tablets, pills, capsules, suspensions and drops). The separation is performed with a 0.05 M sodium dodecyl sulphate/2.4% pentanol eluent at pH 7. The precolumn derivatization improved the resolution in the chromatograms and increased the selectivity in the determination of mixtures of sulphonamides and in preparations where other drugs were present. The derivatization reaction was readily performed in a micellar medium of SDS at pH 1, leading to a rapid and simple procedure. The recoveries were in the 97–104% range with relative standard deviations usually below 3%." @default.
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- W1983485175 date "1995-03-01" @default.
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- W1983485175 title "High-performance micellar liquid chromatography determination of sulphonamides in pharmaceuticals after azodye precolumn derivatization" @default.
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- W1983485175 doi "https://doi.org/10.1016/0731-7085(95)01279-t" @default.
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