Using benzene as internal standard,the calibration factors of derivative of aldehydes 2,4-dinitrophenylhydrazine(DNPH) were measured.

• 将醛类物质与2；4-二硝基苯肼(DNPH)的衍生反应液直接进样；以苯为内标物；测定了甲醛、乙醛等醛类物质DNPH衍生物的校正因子.