Abstract: Inductively coupled plasma emission spectrometry (ICP-OES) was used to determine the contents of 12 trace elements (K, Na, Ca, Mg, Fe, Zn, Cu, Mn, P, Sr, Al, and Cr) in premixed feed and crude feed for dairy cows. Samples were pretreated with microwave digestion before being analyzed. The calibration curves of all elements were linear with correlation coefficients above 0.999 8. The spiked recoveries for this method were 90.0%–106.9%, and the coefficients of variance (CV) for six replicate determinations were 0.69%–8.70%. With the advantages of low limits of detection and high sensitivity and accuracy, this method could be useful for the simultaneous determination of multiple trace elements in dairy feeds.

Key words: inductively coupled plasma emission spectrometry; premixed feed for dairy cows; crude feed for dairy cows; trace elements

摘要： 采用电感耦合等离子体发射光谱（inductively coupled plasma emission spectrometry，ICP-OES）法测 定奶牛预混合饲料和粗饲料中12 种微量元素（K、Na、Ca、Mg、Fe、Zn、Cu、Mn、P、Sr、Al、Cr）的含 量，样品用微波消解技术进行前处理。结果表明：各元素的线性相关系数均在0.999 8以上，方法加标回收率为 90.0%～106.9%，样品6 次平行测定结果的变异系数为0.69%～8.70%；该方法检出限低、灵敏度高、准确性好， 可以同时测定奶牛饲料中的多种元素。

关键词: 电感耦合等离子体发射光谱法；奶牛预混合饲料；奶牛粗饲料；微量元素