【摘要】 本文应用导数极谱法研究了食品中人工合成色素——苋菜红、胭脂红的连续快速测定法．与经典的层析—分光光度法比较，本方法具有简便、快速、精确的特点．在ｐＨ９．４的氨基乙酸介质（０．１ｍｏｌ·Ｌ－１）中，苋菜红、胭脂红分别于－０．６２Ｖ（ｖｓ·ＳＣＥ），－０．８３Ｖ（ｖｓ·ＳＣＥ）处产生一灵敏的吸附还原波，其导数波高分别与两色素的浓度在０．０８～１３．０ｍｇ／Ｌ，０．１～１１．０ｍｇ／Ｌ范围内成直线关系，检测限分别为０．０４ｍｇ／Ｌ，０．０５ｍｇ／Ｌ．该法用于测定食品中苋菜红、胭脂红含量，结果令人满意更多还原

【Abstract】 This article describes the continous rapid determination of amaranth and carmine in food pigment with derivative polarography, In amino acetic acid buffer solution (pH=9.4), amaranth and carmine could produce a sensitive adsorbable reductive wave at -0.62V(vs.SCE) and -0.83V(vs.SCE). The change of the derivative peak height with concentration of amaranth and carmine is linear in the range of 0.08￣13.0mg/L and 0.1￣11.0mg/L. The detection limit was 0.04mg/L and 0.05mg/L. The method has been applied successfully to determine amaranth and carmine in grain.更多还原