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Nickel,ferronickel and nickel alloys—Determination of phosphorus content—Phosphovanoclonolybeate molecular absorption spectrometric method
IDT ISO 11400:1992
冶金工业信息标准研究院
GB/T 21931的本部分规定了磷钒钼黄分光光度法测定镍、镍铁和镍合金中磷含量。
本部分适用于镍,镍铁和镍合金中磷含量的测定。测定范围(质量分数):0.000 5%~0.05%。
可用络合效应和挥发性(如,铬)排除砷、铬、铪、铌、硅、钽、钛和钨等元素的干扰。在干扰元素含量低时,所测量的磷含量最低达到0.000 5%(质量分数)。
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