离子色谱(以下简称IC)是最近几年在美国Dow化学公司发展起来的一种新技术。1977年仪器开始作为商品出售。它使用离子交换原理,用抑制柱扣除淋洗液的本底电导,用电导法检定。IC可以快速,同时测定多组分,特别是目前难以用其它仪器,如原子吸收、光谱、极谱、X-荧光等测定的pK小于7的阴、阳离子,主要是阴离子。例如在十几分钟内可同时分离和测定F~-、Cl~-、NO_2~-、PO_4~(3-)、Br~-、NO_3~-、SO_4~(2-)等阴离子和Na~+、NH_4~+、K~+等阳离子。几种阴离子和阳离子的标准IC图见图1(A、B)。样品一般 Ion chromatography (hereinafter referred to as IC) is a new technology developed in recent years in the United States Dow Chemical Company. In 1977 the instrument began to be sold as a commodity. It uses the principle of ion exchange, with the suppression of column background eluent conductivity, conductivity method test. The IC allows rapid and simultaneous determination of multiple components, especially the anions, cations, mainly anions, whose pK is less than 7 as currently determined by other instruments such as atomic absorption, spectroscopy, polarography, X-fluorescence and the like. For example, the anion and Na ~ + ions of F ~ -, Cl ~ -, NO_2 ~ -, PO_4 ~ (3 -), Br ~ -, NO_3 ~ -, SO_4 ~ , NH_4 ~ +, K ~ + and other cations. The standard ICs for several anions and cations are shown in Figure 1 (A, B). The sample is average