摘要
报道了一个测定硒的高灵敏极谱吸附波新体系。在 ０． ７ ｍｏｌ／Ｌ ＨＢｒ溶液中，Ｓｅ（Ⅳ）－ （Ｃ２Ｈ５）４ＮＩ－Ａｓ（Ⅲ）体系于－０．６１Ｖ（ｖｓ．ＳＣＥ）处产生一高灵敏的极谱吸附波。峰电流与Ｓｅ （ Ⅳ）浓度在 ０． １～４０ μｇ／Ｌ范围内呈线性关系。检出限为 ０． ０５ μｇ／Ｌ。研究了极谱波的性质。 用本法测定了土壤中的全硒和有效硒，结果满意。
A highly sensitive polarographic adsorptive wave system for the determination of selenium has been proposed. In a solution of 0. 7 mol/L hydrobromic acid, a highly sensitive polarographic adsorptive wave of Se(Ⅳ)-(C2H5)4NI-As (Ⅲ ) system was obtained by singlesweep polarography. The peak potential is at-0. 61 V(vs. SCE). The peak cnrrent is linearly proportional to the concentration of selenium in the range of 0. 1-40 μg/L. The character of the polarographic wave was studied. The method has been applied to the determination of total selenium and available selenium in soil with satisfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1997年第6期686-689,共4页
Chinese Journal of Analytical Chemistry
基金
河北省自然科学基金资助课题
关键词
硒
砷
四乙基碘化铵
吸附波
极谱
土壤
Selenium(Ⅳ ), arsenic(Ⅲ ), tetraethylammonium iodide, adsorptive wave
