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高效液相色谱法测定乳制品中三聚氰胺的含量
引用本文:胡阳,倪辉,吴光斌,彭爱红,蔡慧农.高效液相色谱法测定乳制品中三聚氰胺的含量[J].厦门水产学院学报,2010(1):36-38.
作者姓名:胡阳  倪辉  吴光斌  彭爱红  蔡慧农
作者单位:集美大学生物工程学院,福建厦门361021
摘    要:为建立乳制品中三聚氰胺含量的高效液相色谱测定方法,通过超声提取,离子交换萃取小柱净化,结合高效液相色谱进行样品测定.色谱条件:EclipseXDB—C18柱(5μm,4.6m/n×150mm,ASilent);流动相:A为离子对缓冲液(1.05g柠檬酸和1.01g辛烷磺酸钠定容至500mL,pH值为2.6),B为乙腈,配制比例为90%A+10%B,流速1.0mL/min,柱温30℃,进样量20止,检测波长240nm.结果表明:三聚氰胺标准曲线为Y=0.009z+0.3627,相关系数R=0.9998,在0.17—110.0mg/L范围内线性关系良好,方法检出限为0.12mg/L,两个样品三个水平的加标回收率分别为96.34%(RSD=4.76)、84.86%(RSD=7.21)、104.29%(RSD=7.63)和95.31%(RSD=4.39)、89.25%(RSD=3.88)、92.59%(RSD=5.27).

关 键 词:高效液相色谱  三聚氰胺  乳制品

High-performance Liquid Chromatographic Method for the Determination of Melamine in Dairy Products
Authors:HU Yang  NI Hui  WU Guang-bin  PENG Ai-hong  CAI Hui-nong
Institution:( School of Biotechnology Engineering, Jimei University, Xiamen 361021, China)
Abstract:To set up a quantitative high-performance liquid chromatographic method for the simultaneous determination of melamine in dairy products, an RP - HPLC method was set up, using Eclipse XDB - C18 column (5 μm, 4.6 mm × 150 mm, Agilent), ion-pair buffer (pH =2. 6) : acetonitrile =90:10 as mo- bile phase with a flow rate of 1.0 mL/min at the detection wavelength of 240 nm. The calibration curve was linear in the range of 0. 17 - 110. 0 mg/L for melamine ( R = 0. 999 8) . The addition recoveries of two sam- pies were 96. 34 % (RSD=4.76), 84.86 % (RSD=7.21), 104. 29 % (RSD=7.63) and 95.31% ( RSD = 4. 39), 89.25 % ( RSD = 3.88), 92. 59 % ( RSD = 5.27) respectively.
Keywords:high-performance liquid chromatographic method  melamine  dairy products
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