本文件规定了一种分光光度法，用于测定镍、镍铁和镍合金中的磷含量，范围为0000？5？%（按质量计）和0.05？%（按质量计）。 砷、铬、铪、铌、硅、钽、钛和钨会产生干扰，但可以通过络合或挥发（铬）来避免干扰。只有在这些干扰元素含量较低的样品中，才能达到最低的磷含量[0000？5%（按质量计）]。

This document specifies a spectrophotometric method for the determination of the phosphorus content in nickel, ferronickels and nickel alloys between 0,000？5？% (by mass) and 0,05？% (by mass). Arsenic, chromium, hafnium, niobium, silicon, tantalum, titanium and tungsten interfere, but the interferences can be avoided by complexation or volatilization (for chromium). The lowest phosphorus content [0,000？5？% (by mass)] can only be reached in samples with low contents of these interfering elements.