摘要
建立了使用高压离子色谱快速测定饮用水中7种无机阴离子的方法。环境水样经0.22μm尼龙滤膜过滤后可直接进样分析。采用Dionex Integrion高压离子色谱仪和AS22-Fast-4μm阴离子交换柱(150 mm×4 mm),可在5 min内完成对F^-、Cl^-、Br^-、NO_2^-、NO_3^-、SO_4^(2-)和PO_4^(3-)这7种阴离子的分析。以4.5 mmol/L碳酸钠和1.4m m o l/L碳酸氢钠为淋洗液,流速为2 m L/m in。7种阴离子的检出限为0.007~0.07 m g/L(S/N=3),在较宽范围内有良好的线性关系(相关系数不小于0.999)和重现性(相对标准偏差不大于0.48%,n=8)。实际样品加标回收率为91.4%~109.7%,相对标准偏差为0.30%~0.45%(n=5)。将该方法应用于饮用水厂进出水的分析,结果表明在进出水中检出6种阴离子,以Cl^-、NO_3^-和SO_4^(2-)为主。该方法简便快速、灵敏准确,尤其适合高通量样品中阴离子的快速分析。
A new method was developed for the determination of inorganic anions in drinking water by high pressure ion chromatography （HPIC）. Water samples were analyzed directly after filtered by 0. 22 pm nylon membrane. Seven anions （F^-, Cl^-, Br^-, NO;, NO^-, SO4^- and PO4^-） were separated well in 5 min by Dionex Integrion HPIC and AS22-Fast-4 pm anion exchange column. In this study,4. 5 mmol/L sodium carbonate and 1. 4 mmol/L sodium bicarbonate were used as the mobile phases with the f^ow rate of 2 mL/min. The limits of detection of the ana-lytes （S/N =3） ranged from 0.007 to 0.07 m^^L,and they all had good linear relationships （r ^0. 999） in a wide range with good relative standard deviations （RSDs^0. 48%, n = 8）. The recoveries of the seven anions in drinking water ranged in 91. 4 % -109. 7% with RSDs of 0. 30% -0. 45% （n = 5）. The developed method was applied to analyze the drinking water samples from seven tap waterworks. The results showed that six anions were detected in these samples, and Cl^-, NO^- and SO^2- were the predominant anions. The method is simple, rapid, accurate, relia-ble ,and suitable for the rapid determination of common anions in water samples.
出处
《色谱》
CAS
CSCD
北大核心
2016年第10期968-971,共4页
Chinese Journal of Chromatography
基金
国家重大科学仪器设备开发专项(2012YQ09022907)~~
关键词
高压离子色谱
快速分析
阴离子
饮用水
high pressure ion chromatography （HPIC）
rapid determination
anions
drinking water
