本文件规定了采用电感耦合等离子体质谱法（ICP-MS）定量测定钙（Ca）、铜（铜）、铁（Fe）、镁（Mg）、锰（锰）、磷（P）、钾（K）、钠（Na）、锌（Zn）、铬（Cr）、钼（Mo）和硒（Se）的方法。本方法适用于婴幼儿配方食品和成人营养制品中12种元素的测定。该方法也适用于牛奶、奶粉、乳清粉、黄油和奶酪（不包括铬的测定），因为所有铬的结果都低于定量限，并且在这些基质中无法测定再现性[1]。本方法是ISO 20649 | IDF 235（AOAC 2011.19[2]）的扩展，仅对婴儿配方奶粉和成人营养产品中的铬、钼和硒进行了验证。

This document specifies a method for the quantitative determination of calcium (Ca), copper (Cu), iron (Fe), magnesium (Mg), manganese (Mn), phosphorus (P), potassium (K), sodium (Na), zinc (Zn), chromium (Cr), molybdenum (Mo) and selenium (Se) using inductively coupled plasma and mass spectrometry (ICP-MS). The method is applicable for the determination of all 12 elements in infant formula and adult nutritional products. The method is also applicable for milk, milk powder, whey powder, butter and cheese excluding the determination of Cr, because all Cr results were below the quantification limit and reproducibility could not be determined in these matrices[1]. The present method is an extension of ISO 20649 | IDF 235 (AOAC 2011.19[2]) which was validated only for Cr, Mo and Se in infant formula and adult nutritional products.