单扫描极谱法连续测定食品中非食用色素酸性金黄和酸性大红  

Simultaneous Determination of Micro-Amounts of Acid Orange and Acid Red in Food by Single Sweep Polarography

作　　者：陈文[1] 王正猛[1] 吴晓蓉[1] 王宏[1] 

机构地区：[1]成都理工大学材料与生物工程学院,四川成都610059

出　　处：《食品科学》2005年第6期210-212,共3页Food Science

摘　　要：提出了在0.01mol/L硼砂底液中,单扫描极谱法于原点电位-0.50V(vs.SCE)起扫,在峰电位分别为-0.74V(vs.SCE),0.89V(vs.SCE)测定酸性金黄和酸性大红的方法。线性范围为0.20～10.0μg/ml酸性金黄,0.20～-6.0μg/ml酸性大红;最低检出浓度均为0.10μg/ml,本法简捷快速,用于食品分析符合要求。A method for the determination of acid orangeⅡand acid redGR simultaneously in a supporting solution of 0.01mol/ L by single sweep polarography has been established. The peak potentials were -0.74V, -0.89V(vs.SCE) respectively .The peak hights were linearly proportional to the concentration of acid orangeⅡin the range of in the range of 0.20～10.0μg/ml and of acid redGR 0.20～6.0μg/ml. The detection limit was 0.10 μg/ml for both OrangeⅡand redGR . This method was simple and sensitive with good selectivity. The results were satisfactory when used to analyse food.

关 键 词：单扫描极谱法 食品 酸性金黄 酸性大红 

分 类 号：O657.14[理学—分析化学]