Determination of piromidic acid residues in trout muscle tissue and in urine by liquid chromatography with post-column modification of pH and fluorimetric detection
作者： I Durán Merás , T Galeano Dı́az , F Salinas López , MI Rodrı́guez Cáceres , None
DOI: 10.1016/S0378-4347(98)00332-6
关键词:
摘要: Abstract A rapid high-performance liquid chromatographic method has been developed to determine piromidic acid in trout muscle tissue and urine, the presence of nalidixic, 7-hydroxymethylnalidixic, oxolinic pipemidic acids cinoxacin. Nova-Pak C18 column was used with acetonitrile–4·10−4 M oxalic (40:60, v/v) as mobile phase. post-column change pH made NaOH. Fluorimetric detection at 456 nm (λex 275 nm) used. The instrumental limit 5.91 ng/ml, based on height peak. Pretreatment urine samples not necessary fish were extracted sodium hydroxide solutions cleaned by means an extraction chloroform. Detection 147 ng/ml for ng/g muscle. Good separation without interference from any other components obtained. Recovery better than 87% 72% tissue.
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