本国际标准规定了校准方法和标准添加方法，用于测定 火焰发射光谱法测定动物饲料中的钾和钠含量。 如果不知道测量的排放量是钾还是钠，则采用标准添加法 受到基质效应的影响。钾和钠的测定限为0.04 g/kg。 如果已证明不存在此类基质效应，则校准方法适用。

This International Standard specifies a calibration method and a standard addition method for the determination of potassium and sodium contents of animal feeding stuffs by flame-emission spectrometry. The standard addition method applies if it is not known whether the emissions measured for potassium or sodium are subject to matrix effects. The limit of determination for potassium and sodium is 0,04 g/kg. The calibration method applies if such matrix effects have been shown to be absent.