Laboratory for Analytical Chemistry, Department of Chemistry, University of Ferrara, Via L. Borsari 46, 44100 Ferrara, Italy.
Talanta. 1987 Jun;34(6):529-33. doi: 10.1016/0039-9140(87)80182-0.
Pairs of elements with very small differences in their half-wave potentials were determined at trace levels by second harmonic a.c. anodic stripping voltammetry. The simultaneous determination of lead and thallium as well as that of bismuth and antimony in 1M hydrochloric acid as supporting electrolyte was found to be possible in the range of concentration ratios: 7:1 > or = C(Pb):C(Tl) > or = 1:36 and 45:1 > or = C(Sb):C(Bi) > or = 1:35, with <5 % relative error due to mutual interference. The limit of detection was approximately 10(-8)M for all four elements, and the precision and error were 2-3%. The simultaneous determination of these metals in mixtures with concentration ratios outside the quoted ranges is still feasible by the standard-addition technique.
通过二次谐波交流阳极溶出伏安法，在痕量水平上测定了半波电位非常小的元素对。在 1M 盐酸作为支持电解质的范围内，发现可以同时测定铅和铊，以及铋和锑，浓度比范围为：7:1≥C(Pb):C(Tl)≥1:36 和 45:1≥C(Sb):C(Bi)≥1:35，由于相互干扰，相对误差小于 5%。对于所有四种元素，检测限约为 10(-8)M，精密度和误差为 2-3%。通过标准加入技术，仍然可以在超出引用范围的浓度比的混合物中同时测定这些金属。
