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A new method for determination of cephalexin based on the color reaction between cephalexin and ninhydrin has been developed.

孢氨苄所含伯氨基在酸性条件下可与茚三发生显色反应,从而建立流动注射分光光度法孢氨苄的新方法。

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This ninhydrin solution reacts with amino acids present in sweat and turns purple due to the formation of Ruhemman's purple.

茚三酮溶液与汗液中基酸发生反应,由于鲁赫曼成而变成色。

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