Dinitrophenylhydrazine(DNPH) and aldehyde or ketone can react and form 2,4-dinitrophenylhydrazone that can be injected directly on the gas chromatography(GC).

• 利用2,4二硝基苯肼(DNPH)与醛、酮类化合物反应生成稳定的衍生物2,4二硝基苯腙,对所生成的DNPH衍生物溶液直接进行气相色谱分析;