【摘要】 介绍了低压离子色谱仪测定水样（地下水和自来水）和地质样品中Ｌｉ~＋、Ｎａ~＋、Ｋ~＋离子的方法．待测阳离子在色谱柱上被分离，以 ８．６４×１０－４ｍｏｌ·Ｌ－１ＨＮＯ３溶液作流动相，流速为１．２ｍｌ·ｍｉｎ－１经电导检测器（进样量为１．２ｍｌ·ｍｉｎ－１经电导检测器），进样量为４０μｌ时，Ｌｉ~＋、Ｎａ~＋、Ｋ~＋的检出限分别为０．０３０，０．４１０，０．４６０μｇ·ｍｌ－１．更多还原

【Abstract】 A method for determining cations in water samples(well-, tap-water) and geological samples by low pressure ion chromatography is reported. Li~+, Na~+, K~+ have been saparated on a seperation column. The mobile phase used was 8.64 × 10-4mol.I-1 IHNO3 at the flow rate of 1.15ml ·min-1. Cations in fractions that eluted from the column were daterminated by conductor. Detection limits were 30ng. ml-1 for Li~+, 410ng·ml-1 for Na~+, 460ng·ml-1 for K+, for a 40ul injection.更多还原