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化学发光法测定奶粉中的三聚氰胺
引用本文:丁彦庭,岳小玉,晋亚楠,曹阳,谢晓龙,郭婉秋,周艳梅.化学发光法测定奶粉中的三聚氰胺[J].化学研究,2012(2):91-93,99.
作者姓名:丁彦庭  岳小玉  晋亚楠  曹阳  谢晓龙  郭婉秋  周艳梅
作者单位:[1]河南大学基础实验教学中心,河南开封475004 [2]河南大学化学化工学院,河南开封475004
基金项目:河南省科技攻关重点项目(112102310360); 河南省教育厅自然科学研究项目(2011A610005)
摘    要:在碱性条件下,三聚氰胺对鲁米诺-铁氰化钾体系化学发光反应具有明显的增敏作用;据此建立了流动注射化学发光测定奶粉中三聚氰胺的分析方法,确定了优化测定条件,并将该方法用于测定奶粉中的三聚氰胺.结果表明,在优化测定条件下,三聚氰胺的质量浓度在1.0×10-6~4.0×10-5 g.L-1范围内与发光强度呈现良好的线性关系,检出限为2.6×10-7 g.L-1,11次平行测定4.0×10-6 g.L-1三聚氰胺的相对标准偏差为3.42%.与此同时,将所建立的方法用于奶粉中三聚氰胺的测定,结果令人满意.

关 键 词:鲁米诺  铁氰化钾  流动注射  化学发光法  奶粉  三聚氰胺

Determination of melamine in milk powder by chemiluminescence method
DING Yan-ting,YUE Xiao-yu,JIN Ya-nan,CAO Yang,XIE Xiao-long,GUO Wan-qiu,ZHOU Yan-mei.Determination of melamine in milk powder by chemiluminescence method[J].Chemical Research,2012(2):91-93,99.
Authors:DING Yan-ting  YUE Xiao-yu  JIN Ya-nan  CAO Yang  XIE Xiao-long  GUO Wan-qiu  ZHOU Yan-mei
Institution:1.Teaching Center of Basic Experiments,Henan University,Kaifeng 475004,Henan,China; 2.College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,Henan,China)
Abstract:Melamine is able to significantly enhance the chemiluminescence reaction of luminal and K3Fe(CN)6 in alkaline medium.This makes it feasible to establish a new flow injection chemiluminescence method for determining melamine in milk powder.The optimal condition for the determination was examined,and as-established method was adopted to determine melamine in commercial milk powder.It was found that under the optimal experimental condition,melamine concentration in the range of 1.0×10-6-4.0×10-5 g · L-1 was linearly proportional to enhancing chemiluminescence signals.The detection limit for melamine was determined to be 2.6×10-7 g · L-1,and the relative standard deviation for 11 consecutive measurements of melamine with a concentration of 4.0×10-6 g · L-1 was 3.42%.In the meantime,as-established method was successfully applied to determine melamine in commercial milk powder.
Keywords:luminal  K3Fe(CN)6  flow injection  chemiluminescence  milk powder  melamine
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