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介绍了铜精矿中砷含量的直接测定法。试样经硝酸溶解 ,高氯酸冒烟分解硫等残留物后 ,分成等量的两份 ,一份用硫代硫酸钠还原砷后 ,与另一份经处理后形成的砷钼蓝等有色溶液相比较 ,从吸光度差值测得砷的含量。标样、合成样的分析及精密度考证均表明该方法简便可靠。
The direct determination of arsenic in copper concentrates is introduced. The sample was dissolved in nitric acid, perchloric acid fume decomposition of sulfur and other residues, divided into two equal parts, one with sodium thiosulfate reduction of arsenic, with another after the formation of arsenic molybdenum blue and other colored Solution compared to the difference in absorbance measured arsenic content. The standard sample, the synthetic sample analysis and the precision research both showed that the method was simple and reliable.