本文件规定了用液相色谱结合串联质谱法（LC-MS/MS）测定三聚氰胺和三聚氰酸的方法。该方法已在一项实验室间研究中得到验证，该研究通过分析添加了0,71 mg/kg至1,43 mg/kg三聚氰胺和0,57 mg/kg至1,45 mg/kg三聚氰酸的牛奶基婴儿配方奶粉、大豆基婴儿配方奶粉、奶粉、全脂奶、大豆饮料和牛奶巧克力的样品。食品中三聚氰胺和三聚氰酸的定量限（LOQ）分别为0.05 mg/kg和0.25 mg/kg。三聚氰胺的工作范围上限为10 mg/kg，三聚氰酸的工作范围上限为25 mg/kg。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies a method for the determination of melamine and cyanuric acid with liquid chromatography in combination with tandem mass spectrometry (LC-MS/MS). The method has been validated in an interlaboratory study via the analysis of spiked samples of milk-based infant formula, soy-based infant formula, milk powder, whole milk, soy drink and milk chocolate ranging from 0,71 mg/kg to 1,43 mg/kg for melamine and 0,57 mg/kg to 1,45 mg/kg for cyanuric acid. The limits of quantification (LOQ) for melamine and cyanuric acid in food are 0,05 mg/kg and 0,25 mg/kg, respectively. The upper limit of the working range is up to 10 mg/kg for melamine and up to 25 mg/kg for cyanuric acid.All current amendments available at time of purchase are included with the purchase of this document.