谱睿在线除氯技术检测高氯水样中的阴离子

采用戴安公司谱睿(Pre)在线样品前处理技术,使用高容量在线Ag柱和Na柱,开发出了一种柱前去除高氯基体中氯离子的在线分析方法。操作简便,且适用样品范围广;不更换Ag柱可耐受10 g/L NaCl基体,25μL连续进样400针,氯离子去除效率可保持在99%以上。系统选用高容量IonPac AS11-HC氢氧根体系阴离子交换色谱柱,在线淋洗液自动发生装置进行梯度淋洗,用抑制型电导检测。对食盐、分析纯氯化钠等不同基体进行检测,可实现样品在线除氯,并可检测其中不高于10μg/L的溴酸根、氯酸根、亚硝酸根、硝酸根和硫酸根等离子。不同离子校准曲线相关系数均在99.8%以上,加标回收率为80%~110%。该技术具有操作简单、可重复性强、方法新颖等特点,解决了以往高氯基体检测成本过高、适用范围有限、前处理操作复杂等问题。

Determination of Anions in High Chloride Matrix by Ion Chromatography with Pre Online Sample Preparation Technique

We developed a method in which Dionex Pre online sample preparation technique was used to remove chloride by Ag cartridge and Na cartridge.This method is applicable to a wide range of samples and is simpler than off-line approach.Each Ag cartridge carries on 400 consecutive injections(25 microlitre each) of 1% NaCl solution,and the removal efficiency is still above 99%.The separation of anions was carried out by high capacity hydroxide selectivity IonPac AS11-HC gradient separation column while Eluent Gener...