本欧洲标准规定了通过电感耦合等离子体原子发射光谱法（ICP-AES）测定动物饲料中钙，钠，磷，镁，钾，硫，铁，锌，铜，锰和钴元素的方法压力消化。 对11种动物饲料中的钙，钠，磷，镁，钾，硫，铁，锌，铜，锰和钴的元素进行了全面的统计学检验和评估，其中包括2种完全饲料（猪饲料，羊饲料） 3种补料（3种矿物饲料），1种矿物预混料，3种饲料（MgO，磷酸盐，CaCO3）和2种饲料添加剂（CuSO4，膨润土）。 对于钾和硫，HORRAT值大多高于2.因此，对于这些元素，该方法更适用于筛选方法，而不是用于确认目的。 其他元素如钼，铅，镉，砷在11种动物饲料样品中未进行完全统计学测试和评估，因为这些元素的浓度高于大多数样品中的定量限度。因此，对于这些元素使用这种多元素方法，因此需要单个实验室验证。 用于确定提取物

This European Standard specifies a method for the determination of the elements calcium, sodium, phosphorus, magnesium, potassium, sulphur, iron, zinc, copper, manganese and cobalt in animal feeding stuffs by inductively coupled plasma atomic emission spectrometry (ICP-AES) after pressure digestion. The method was fully statistically tested and evaluated for the elements calcium, sodium, phosphorus, magnesium, potassium, sulphur, iron, zinc, copper, manganese and cobalt within the following 11 animal feeds: 2 complete feeds (pig feed, sheep feed), 3 complementary feeds (3 mineral feeds), 1 mineral premixture, 3 feed materials (MgO, phosphate, CaCO3) and 2 feed additives (CuSO4, bentonite). For potassium and sulphur the HORRAT values were mostly higher than 2. Therefore, for these elements the method is more applicable as a screening method and not for confirmatory purposes. Other elements like molybdenum, lead, cadmium, arsenic were not fully statistically tested and evaluated within 11 animal feeding stuff samples because these elements did not occur in concentrations higher than the limit of quantification in most of these samples. A single laboratory validation is therefore necessary for the use of this multi element method for these elements. For the determination of extractable lead in minerals and feeds, containing phyllosilicates (e.g. kaolinite clay) wet digestion with nitric acid should be used. The method limit of quantification for each element is dependent on the sample matrix as well as on the instrument. The method is not applicable for determination of low concentrations of elements. A limit of quantification of 1 mg/kg should normally be obtained. NOTE 1 This method can also be used for the determination in products with high content (> 5 %) of the element to be measured, but for this purpose the accuracy of the method has to be checked individually. NOTE 2 Results of this European Standard EN 15621 may be higher than of EN 15510 because EN 15621 is using pressure digestion mode.