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.
出处
《分析科学学报》
CAS
CSCD
1993年第3期44-48,共5页
Journal of Analytical Science
