JIS G 1258-8:2017规定了在使用ICP原子发射光谱法测定钢中钨时，使用磷酸和硫酸进行分解。本方法适用于钢中含钨率（质量分数）为10.0%或以上（含10.0%）的测定。然而，它不适用于含有一种或多种共存成分且含量率[质量分数（%）]超过表1规定上限的钢。

JIS G 1258-8:2017 specifies decomposition with phosphoric and sulfuric acids among determinations of tungsten in steel using ICP atomic emission spectrometric method. This method is applicable to determination of tungsten content rate (mass fraction) of 10.0% or over to and including 10.0% in steel. However, it is not applicable to steels containing one or more coexisting components with content rate [mass fraction (%)] over the upper limits specifies in Table 1.