离子色谱法测定固定污染源废气中8种阴离子
Determination of 8 kinds of anion in waste gas from stationary source by ion chromatography
刘健 1郭海灵 1明荔莉 1廖佳1
作者信息
- 1. 拱北海关技术中心,广东珠海 519015
- 折叠
摘要
用碱性吸收液采集固定污染源废气中的阴离子样品,0.22µm滤膜过滤,SUPP5型阴离子交换柱分离,以3.2mmol·L-1 Na2CO3和1.0mmol·L-1 NaHCO3溶液等度洗脱,采用电导检测器同时测定其中的F-、BrO3-、Cl-、NO2-、Br-、NO3-、PO43-、SO42-含量.结果显示,8种阴离子在0.050～0.500mg·L-1浓度范围内线性关系良好,检出限为0.002～0.029mg·L-1;测定下限为0.008～0.116mg·L-1;进行3个浓度水平的加标回收实验,回收率为80.8％～117％,相对标准偏差为0.2％～9.8％,表明该方法具有较高的精密度和准确度;将方法用于发电厂燃煤机组和厂界废气的检测,结果显示,燃煤机组废气中检出F-、Cl-、NO2、Br-、NO3-和 SO42-,浓度为0.039～0.686mg·m-3,厂界废气中检出 F-、Cl-、Br-、NO3-和 SO42-,浓度为 0.026～1.090mg·m-3.
Abstract
The anion samples in waste gas from stationary sources were collected by alkaline absorption solution,and filtered by 0.22µm membrane,then F-、BrO3-、Cl-、NO2、Br-、NO3-、PO43-、SO42-were determined by conductivity detector with SUPP5 anion exchange column for 3.2mmol·L-1 Na2CO3 and 1.0 mmol·L-1 NaHCO3 solution as elution.The results showed that the calibration curves had a good linearity in the concentration range of 0.050～0.500mg·L-1,and the detection limits were 0.002～0.029mg·L-1,the determination limits were 0.008～0.116 mg·L-1;Recovery experiments were made at 3 concentration levels,the recovery was 80.8％～1 17％,RSD was 0.2％～9.8％,which indicates that the method has high precision and accuracy;This method was used to detect the waste gas from coal fired units and factory boundary in power plants,the results showed that,F-,Cl-,NO2,Br-,NO3-and SO42-were detected in waste gas from coal fired units,the concentration was 0.039～0.686mg·m-3,while F-,Cl-,Br-,NO3-and SO42-were detected in waste gas from factory boundary,The concentration was 0.026～1.090mg·m-3.
关键词
离子色谱法/固定污染源/废气/阴离子Key words
ion chromatography/stationary sources/waste gas/anion引用本文复制引用
出版年
2024
NETL
NSTL
万方数据