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高效液相色谱法(HPLC)在有机分析中已有广泛的应用,在无机分析方面近年来也引起关注。许多研究者试图将HPLC应用于金属离子的分离测定,对许多类型的金属螯合物进行了研究。二乙基二硫代氨基甲酸钠(DDC)是一种通用型螯合剂,可以和许多重金属离子作用,生成稳定的螯合物,在紫外区有特征吸收,因此用此类螯合物有可能实现多元素的分离测定。Heizmann等曾用硅胶柱,探讨了镉(Ⅱ)、镍(Ⅱ)、铜(Ⅱ)、汞(Ⅱ)等DDC螯合物的分离,但稳定性差。Hutchins等则在反相色谱柱上,用甲醇-乙腈-水为洗脱液,分离了数种DDC金属螯合物,给出了人工合成电镀液的色谱图。Schwedt报道了用Lichrosorb RP-8柱分离这类螯合物。对于影响金属螯合物色
High performance liquid chromatography (HPLC) has been widely used in organic analysis, and has also attracted attention in inorganic analysis in recent years. Many investigators have attempted to apply HPLC to the separation of metal ions and have studied many types of metal chelates. Sodium diethyldithiocarbamate (DDC) is a universal chelator that interacts with many heavy metal ions to form stable chelates that have a characteristic absorption in the UV region, making it possible to use such chelates Multi-element separation and determination. Heizmann et al. Used silica gel column to study the separation of DDC chelates such as cadmium (Ⅱ), nickel (Ⅱ), copper (Ⅱ) and mercury (Ⅱ) but their stability was poor. Hutchins et al. Then separated several DDC metal chelates on a reversed-phase column with methanol-acetonitrile-water as eluent and gave a chromatogram of the synthetic electroplating solution. Schwedt reported the use of a Lichrosorb RP-8 column to separate such chelates. For the impact of metal chelate color