导数示波极谱法测定大气和水中痕量硫化物  

Determination of Trace Sulfide In Atmosphhere and Water by Derivative Oscillopolarography

作　　者：韦进宝[1] 黄鹤翔[1] 张琳[1] 卢大远[2] 

机构地区：[1]武汉大学环境科学系,武昌430072 [2]武汉市环境监测中心站

出　　处：《分析科学学报》1993年第3期44-48,共5页Journal of Analytical Science

摘　　要：本文提出以导数示波极谱法直接测定各种水质和大气中痕量硫化物,底液为0.032mol/LEDTA—0.10mol/L NaOH—0.040mol/L抗坏血酸。在—0.70V(V_·SCE)处,获得一灵敏的导数峰电流。硫化物浓度在9.38×10^(-9)～5.16×10^(-4)mol/L之间与峰电流有线性关系。检测限为3.12×10^(-9)mol/L。用本方法分别测定大气中的H_2S和水中的硫化物,获得满意结果。This paper reportes determination of trace sulfide In atmosphere and water by derivative os- cillopolarography. A sensitive derivative peak current is obtained in a system of 0.032mol/L EDTA-0.10mol/L sodium hydroxide-0.04mol/L ascorbic acid. The peak potential is at -0.70V(Vs.SCE). There is linear relationship betweeb the peak current and concentration of sulfide In the rang of 9.38×10^-9—5.16×10^-4mol/L. The Detection limit is 3.12×10~9mol/L. The result for the determi nation of trace sulfide In atmosphere and water is satisfactory. The mechanism of electrode process and current property has also been discussed.

关 键 词：硫化氢 硫化物 极谱分析 大气 水质 

分 类 号：X830.2[环境科学与工程—环境工程]