研究论文
李雨仙,曾雨,严辉宇.地面水体中硫阴离子电化学形态分析方法的研究──硫酸盐的测定[J].环境科学学报,1996,16(4):488-493
地面水体中硫阴离子电化学形态分析方法的研究──硫酸盐的测定
- ELECTROANALYSIS OF INORGANIC SULFUR SPECIES IN GROUND WATERS──DETERMINATION OF SULFATE
- 基金项目：国家自然科学基金
- 作者
- 单位
- 李雨仙
- 中国科学院生态环境研究中心,北京 100085
- 曾雨
- 中国科学院生态环境研究中心,北京 100085
- 严辉宇
- 中国科学院生态环境研究中心,北京 100085
- 摘要：提出了一种新的测定可溶性硫酸盐的电量分析方法,此法基于SO与BaCrO4反应释放出Cr2O42-经酸化后转变为Cr2O72-,然后用碘量库仑滴定法测定Cr2O72-,根据库仑滴定消耗的电量,通过化学计量关系,并按法拉第定律计算出硫酸盐含量。此法可测定μg量的硫酸盐,适于测定水系中可溶性硫酸盐。
- Abstract：A new methods is reported for the determination of dissolved sulfate by precipitation of sulfate using the reaction of sulfate with barium chromate combining with releasing of chromate with subsequent acidification and determination by ionometric coulometry. The amount of sulfate is calculated by using chemical reaction and Faraday Law. The method can detect sulfate at ppm level. Application of the method to the analysis of natural water samples demonstrated that it was convenient and reliable and had high sensitivity and accuracy.
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