在各类液相色谱法中,善于测定阴离子的,首推离子色谱法(Ion Chromatogrsphy简称IC),其原理在国内外的期刊中已有详细的报导。该法的灵敏度高,对一般阴离子的测定,其检测限均可达到ppm级,其中Cl~-、F~-、SO_4~(2-)可达到ppb级。测量快速,1—5分钟可测定一个离子,在图1中,溶液一次进样后,在6分针完成F~-、Cl~-等9个阴离子的测定。仪器的价格低廉,在一万美元左右。备有高效液相色谱仪的实验室,只需花1千 In various types of liquid chromatography, good at anion detection, the most important ion chromatography (Ion Chromatogrsphy referred to as IC), the principle has been reported in detail in domestic and foreign journals. The method of high sensitivity, the determination of the general anion, the detection limit can reach ppm level, of which Cl ~ -, F ~ -, SO_4 ~ (2-) can reach ppb level. Fast measurement, 1-5 minutes to determine an ion, in Figure 1, the solution after a sample, the completion of the 6 minute hand F ~ -, Cl ~ - 9 anion determination. The price of the instrument is low at about 10,000 US dollars. A lab with a HPLC is only a thousand