摘要
建立了示差脉冲极谱法测定饮料中的合成色素柠檬黄的新方法。在pH 6.00的磷酸盐缓冲溶液中,柠檬黄在-0.59 V处产生一灵敏的还原峰,在1.25×10-6～4.37×10-5 mol/L浓度范围内,其峰电流与浓度呈线性关系,线性回归方程为ip(μA)=2.46×106 c(mol/L)+11.4(相关系数r=0.970),实验检出限为0.27μg/mL。利用该方法测定了两种市售饮料中柠檬黄,加标回收率在87.5%～109.6%之间。
The differential pulse polarography was used for determining the amounts of lemon yellow in drink.In pH 6.00 phosphat buffer solution,Lemon yellow had a reduction peaks at-0.59 V.The calibration graph to determine lemon yellow was linear in the range from 1.25×10-6 mol/L to 4.37×10-5 mol/L（r=0.970）,and the detection limit was 0.27 μg/mL.The method was applied to determining two kinds of drinks with satisfied average recoveries from 96.7% to 103.3%,respectively.
出处
《广州化工》
CAS
2011年第21期112-114,共3页
GuangZhou Chemical Industry
关键词
柠檬黄
合成色素
示差脉冲极谱法
lemon yellow
synthetic pigment
differential pulse polarography
作者简介
李翱楠（1986一）女，辽宁师范大学化学化工学院2009级硕士研究生。
通讯作者：赫春香（1961一）女，教授，主要从事分析化学方面的教学与研究。E—mail：hcx0224@163．com
