粉末冶金材料与制品化学分析方法 第2部分：铁基材料与制品中铜的测定（氟化氢铵掩蔽-碘量法）
Methods for chemical analysis of powder metallurgy materials and products. Part 2：The ammonium hydrogen fluoride masking,iodometriy method for the determination of copper in iron-based materials and products