X射线荧光法测定土壤中可提取态硫酸盐  

THE DETERMINATION OF EXTRACTABLE SULFATE IN SOIL BY X-RAY FLUORESCENCE SPECTROSCOPY

作　　者：王修德[1] 黄衍初[1] 庞叔薇[1] 

机构地区：[1]中国科学院生态环境研究中心

出　　处：《环境化学》1991年第5期51-55,共5页Environmental Chemistry

摘　　要：本文采用X射线荧光法测定土壤中可提取态硫酸盐,方法快速灵敏。易溶态硫酸盐和吸附态硫酸盐分别用0.15％CaCl_2和0.01mol/1Ca(H_2PO_4)_2溶液提取,以BaSO_4形式沉淀,然后用滤膜收集,干燥后用XRF测定SKα强度。分析精密度<5.0％,样品分析结果同浊度法一致。A rapid and sensitive method for the determination of ex-tractable sulfate in soil by XRF is presented. Easily soluble sulfate and adsorbed sulfate in soil were extracted by 0.15% CaCl2 and 0.01mol/l Ca(H2PO4)2 solution respectively.The BaSO4 precipitate thus obtained was filtered through filter film, then dried. The sulfate was determined directly by XRF. The precision of the method is satisfactory with relative fluctuation less than 5.0%. The results for the extractable sulfate by this method are coincident with that by turbidimentry.

关 键 词：土壤 硫酸盐 X射线荧光法 测定 

分 类 号：X530.2[环境科学与工程—环境工程]