Ferrochromium, silicochromium and nitrogen-bearing ferrochromium—Determination of phosphorus content—Molybdobismuthylphosphoric blue spectrophotometric method and the molybdenum blue spectrophotometric method
冶金工业信息标准研究院
GB／T 4699的本部分规定了用铋磷钼蓝分光光度法和钼蓝分光光度法测定磷含量。
本部分适用于铬铁、真空微碳铬铁、氮化铬铁和硅铬合金中磷含量的测定，铋磷钼蓝分光光度法测定范围（质量分数）：0.008%~0.080%;钼蓝光度法测定范围(质量分数):<0.15%。
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