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一、前言 本文对纯铅中As、Sn的分机 进行了条件选择,试验方法适于铅分类中1、2、3号铅中的As、Sn分析,本方法还可推广应用于铅中Zn、Sb的分析。 大家知道,纯铅中As、Sn的含量较低,约在0.000x～0.0000x之间,这样低的含量,显然用化学分析的方法是比较困难的。我们应用发射光谱的特性,分析砷和锡,取得较为满意的结果。本文所叙述的是采用三标准试样法,将粒状样品装入碳电极小孔中,用直流电弧阳极激发,标样和试样各摄谱三次,按三次平均值计算结果,测定得出铅中的As、Sn的含量。
I. Preface This article selects As and Sn extrusions from pure lead. The test method is suitable for the analysis of As and Sn in Lead No. 1, No. 2, and No. 2. This method can also be applied to the determination of Zn, Sb analysis. We all know that pure lead in the low content of As, Sn, between about 0.000x ~ 0.0000x, such a low content, obviously the method of chemical analysis is more difficult. We use the characteristics of emission spectra, analysis of arsenic and tin, to obtain more satisfactory results. Described in this article is the use of three standard sample method, the granular sample into the carbon electrode pores, DC arc anode excitation, the standard sample and the sample three times, according to three times the average calculation, the determination of lead In the As, Sn content.