【摘要】 本文用Shimadzu HIC-6A高效单柱离子色谱仪和Shim-pack IC-CI低容量阳离子色谱柱,研究了不同浓度与不同pH值的淋洗剂对金属离子保留行为的影响,优选4.0 m mol/L HNO₃淋洗同时测定Li⁺、Na⁺、K⁺、R6⁺和Cs⁺离子以及优选1.25m mol/L乙二胺和5.00m mol/L柠檬酸淋洗同时测定Be²⁺、Mg²⁺、Ca²⁺、Sr²⁺和Ba²⁺离子的最佳色谱条件,并用于饮水的测定.本法标准加入回收,碱金属5种离子的回收率达101.2%～103.5%;碱土金属5种离子的回收率达99.80%～107.7%.水样分析,Na⁺和K⁺离子的RSD为0.86%和1.02%,Mg²⁺和Ca²⁺离子的RSD为0.364%和0.70%。更多还原

【Abstract】 The determination of alkali metals and alkaline earths by ionchromatograph with single column-single conductivity detector is des-cribed.The analysis is performed on a low capacity cation separatorcolumn.The retention behaviour and resolution of metallic ions are stu-died in different concentration of eluent and pH values. 4.0 m mol/Lnitric acid eluent is used to separate mixtures of alkali metals,and aneluent containing 1.25 m mol/L ethylenediammonium and 5.00 m mol/L citricacid is used for separation of alkaline earths.The method has been usedto determine alkali metal ions,magnesiun（Ⅱ）and calcium（Ⅱ）in drin-king water.The recovery rationes are as follow:alkali metals 101%～103%,alkaline earhts 99.8%～101.7%.The relative standard of Na⁺,K⁺,Mg²⁺,Ca²⁺ are 0.86%,1.02%,0.36% and 0.70% respectively.This me-thod is more rapid,simpler and more sensitive.更多还原