本欧洲标准规定了用于测定钙，钠，磷，镁，钾，铁，锌，铜，锰，钴，钼和铅的元素的电感耦合等离子体原子发射光谱法（ICP-AES）。 钙，钠，磷，镁，钾，铁，锌，铜，锰，钴，钼和铅在干灰化后主要由有机物组成的饲料中提取，溶于盐酸或主要由无机用盐酸湿消化后的物质。 为了测定含有页硅酸盐（如高岭土）的矿物质和饲料中的可提取铅，应使用硝酸湿法消解。 该方法成功测试: - 以下动物饲料中的钙，钠，磷，镁，钾，铁，锌，铜，锰，钴和钼:2种完全饲料（猪饲料，绵羊饲料），1饲料（磷酸盐），1种矿物预混物和2种补充饲料（2种矿物饲料）， - 在2种饲料（磷酸盐，CaCO3），2种饲料添加剂（膨润土，CuSO4），1种补充饲料（矿物饲料） 每个元素的方法检测极限取决于样品矩阵和仪器。的

This European Standard specifies the inductively coupled plasma atomic emission spectroscopy (ICP-AES) method for the determination of the elements calcium, sodium, phosphorus, magnesium, potassium, iron, zinc, copper, manganese, cobalt, molybdenum and lead. The elements calcium, sodium, phosphorus, magnesium, potassium, iron, zinc, copper, manganese, cobalt, molybdenum and lead are extracted either in feeds mainly consisting of organic matter after dry ashing and dissolving in hydrochloric acid or in feeds mainly consisting of inorganic matter after wet digestion with hydrochloric acid. 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 was successfully tested for: - calcium, sodium, phosphorus, magnesium, potassium, iron, zinc, copper, manganese, cobalt and molybdenum in the following animal feeding stuffs: 2 complete feeds (pig feed, sheep feed), 1 feed material (phosphate), 1 mineral premixture and 2 complementary feeds (2 mineral feeds), - lead in 2 feed materials (phosphate, CaCO3), 2 feed additives (Bentonite, CuSO4), 1 complementary feed (mineral feed) The method detection limit for each element is dependent on the sample matrix and the instrument. The method is not applicable for the determination of a low concentration of elements. The limit of quantification should be 3 mg/kg or lower. This method also applies for the determination in products with high element content (>5 %). For this purpose the accuracy of the method has to be checked individually. NOTE 1 EN 15621 uses the pressure digestion mode, therefore lower results may be obtained with the described method in this standard.