Juang R S, Wu W L
Department of Chemical Engineering, Yuan Ze University, Chung-Li 320, Taiwan.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2001;36(6):935-46. doi: 10.1081/ese-100104122.
Three simple electrolyte systems were tested for determination of four alkali and alkaline earth cations (K+, Na+, Ca2+, Mg2+) in aqueous sulfate solutions. The separation was achieved in a system of 5 mM 4-aminopyridine and 5% v/v methanol with indirect UV detection at 214 nm, in which the electrolyte pH was adjusted to be 4.30 by adding 1 M glycolic acid. Four cations were well separated within 5 min at an applied voltage of 15 kV. Linear relationships of the calibration curves were obtained up to 50 ppm for all four cations. To evaluate this electrolyte system, the determination of these cations was also conducted for real rain waters.
测试了三种简单的电解质体系，用于测定硫酸盐水溶液中的四种碱金属和碱土金属阳离子（K⁺、Na⁺、Ca²⁺、Mg²⁺）。在含有5 mM 4-氨基吡啶和5% v/v甲醇的体系中，通过间接紫外检测（检测波长为214 nm）实现了分离，其中通过加入1 M乙醇酸将电解质pH调节至4.30。在15 kV的施加电压下，四种阳离子在5分钟内实现了良好分离。所有四种阳离子的校准曲线在高达50 ppm的范围内均获得了线性关系。为了评估该电解质体系，还对实际雨水进行了这些阳离子的测定。
