本文件规定了使用电感耦合等离子体和质谱（ICP-MS）定量测定钙（Ca）、铜（Cu）、铁（Fe）、镁（Mg）、锰（Mn）、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，但不包括Cr的测定，因为所有Cr结果都低于定量限，并且在这些基质中无法确定重现性[1]。本方法是ISO 20649 IDF 235（AOAC 2011.19[2]）的扩展，该方法仅针对婴儿配方奶粉和成人营养产品中的Cr、Mo和Se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.