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前言由于砷的毒性,常要测定环境样品中的砷。土壤中的砷,一般用二乙氨二硫代甲酸银法、原子吸收法[1]。在X射线荧光分析中,因As Kα谱线与Pb Lα线重叠,田中英树等采用差减法计算砷含量,Reymont等用硫代乙酰胺共沉淀分离法[3]。我们以硼氢化钾为还原剂,浸渍硝酸银的试纸捕集三氢化砷后,用X射线光谱法测定AsKα线强度。对多种类型土壤样品的分析结果同银盐比色法进行对照,结果满意。由于化学前
Preface Due to the toxicity of arsenic, it is often necessary to determine arsenic in environmental samples. Arsenic in soil, generally with silver dimethyldithiocarbamate method, atomic absorption method [1]. In the X-ray fluorescence analysis, because As Kα line overlaps with the Pb Lα line, Tanaka Hideki et al. Used the subtraction method to calculate the arsenic content, and Reymont et al. Used thioacetamide coprecipitation [3]. We use potassium borohydride as a reducing agent, impregnated with silver nitrate test strips after the capture of arsenic trioxide, X-ray spectrometry Determination of AsKα line intensity. The results of the analysis of various types of soil samples with silver salt colorimetric control were satisfactory. Because of chemical before