摘要
本文将吸附溶出伏安法与催化波法结合起来,研究了Mo(Ⅵ)-H_2SO_4-苦杏仁酸-NaBrO_3体系的吸附溶出催化伏安法。钼(Ⅵ)在10(-12)—10(-8)M的范围内均可与峰高呈良好的线性关系。样品测定的精密度和回收率均令人满意。
A method for the determination of trace Mo by adsorption stripping catalytic voltammetry (ASCV) has been established, The base solution consisted of 2.5×10^(-3) mol dm^(-3) H_2SO_4, 1×10^(-4)mol·dm^(-3) mandelic acid and 2×10^(-3)mol·dm^(-3) NaBrO_3·Mo(Ⅵ) accumulated on a HMDE by adsorbing the complex of Mo (Ⅵ) mandelic acid at -0.1V (vs SCE) for 1—3 min. When the potential of HMDE was linearly scanned to -0.7 V and a first derivative voltammogram was recorded, the stripping-catalytic peak of Mo(Ⅵ) appeared at -0.45 V. The peak current was linearly increased with the concentration of Mo (Ⅵ) over the range of 10^(-12)-10^(-8)mol·dm^(-3). Satisfactory results have been obtained for the determination of biological samples and natural water.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1989年第3期254-256,共3页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金
