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在薄层层析中检出生物碱的试剂通常使用碘化铋钾和碘铂酸。这些试剂不能将仲胺生物碱和叔胺生物碱区分。作者报道了一个可在薄层层析中选择性地检出仲胺生物碱的方法。该方法即利用仲胺和氯醌及乙醛作用可产生一深蓝色的二烷基氨基乙烯醌的反应:
Reagents that detect alkaloids in thin-layer chromatography usually use potassium bismuth iodide and iodoplatinic acid. These reagents can not distinguish between secondary amine alkaloids and tertiary amine alkaloids. The authors reported a method for the selective detection of secondary amine alkaloids in thin-layer chromatography. This method utilizes the reaction of secondary amines with chloranil and acetaldehyde to produce a dark blue dialkylaminoquinone: