摘要
目的建立测定工作场所空气中碘及其化合物的离子色谱脉冲安培检测器定量分析方法。方法碱性活性炭固体吸附管收集空气样品,加入20 mmol/L碳酸氢钠溶液10 mL进行30 min解吸。解吸液使用Dionex ICS-5000离子色谱仪,经Dionex IonPac AS11-HC高效阴离子分离柱分离,脉冲安培检测器检测,以保留时间来定性、峰面积来定量。结果方法的标准曲线相关系数为0.9997,检出限为0.519μg/L(进样量为25μL)。以采样体积为7.5 L计算,该方法的最低定量浓度为2.3μg/m3,方法重现性好,相对标准偏差为2.72%~4.10%。模拟样品的加标回收率为95.8%~98.0%。碱性活性炭固体吸附管的平均解吸效率均大于(94.1%±2.65%)。在4℃下,碘及其化合物能稳定保存5 d。结论离子色谱脉冲安培检测器定量分析法快速、便捷、高效且精度高,能够满足工作场所中碘及其化合物的测定。
Objective To establish a method for the quantitative analysis of iodine and its compounds in workplace air by ion chromatography pulsed amperometric detector.Methods Air samples were collected using alkaline-activated carbon solid-phase extraction tubes and eluted with 10 mL of the 20 mmol/L sodium bicarbonate solution for 30 minutes.The eluate was separated using the Dionex ICS-5000 ion chromatography system with the Dionex IonPac AS11-HC high-performance anion separation column and detected by the pulsed amperometric detector,with the retention time for qualitative analysis and the peak area for quantitative analysis.Results The method had a correlation coefficient of 0.9997 for the standard curve,a detection limit of 0.519μg/L(25μL injection volume),and a minimum quantifiable mass concentration of 2.3μg/m3 calculated using a sampling volume of 7.5 L.The method had good reproducibility,with relative standard deviations ranging from 2.72%to 4.10%and an internal recovery rate of 95.8%to 98.0%for simulated samples.The average elution efficiency of alkaline-activated carbon solid-phase extraction tubes was more than(94.1%±2.65%).Iodine and its compounds could be stably stored for 5 days at 4℃.Conclusions The quantitative analysis method of the ion chromatography pulsed amperometric detector was fast,convenient,efficient,and accurate.It is satisfied with the requirement for the determination of iodine and its compounds in workplaces.
作者
傅佳
胡晓宇
张妍
钟磊
刘浏
曹冬冬
FU Jia;HU Xiaoyu;ZHANG Yan;ZHONG Lei;LIU Liu;CAO Dongdong(Beijing Center for Disease Prevention and Control,Beijing,100013,China)
出处
《职业卫生与应急救援》
2024年第4期533-536,共4页
Occupational Health and Emergency Rescue
关键词
离子色谱
脉冲安培检测器
碱性活性炭固体吸附管
碘及其化合物
工作场所
空气
ion chromatography
amperometric detector
alkaline-activated carbon solid-phase extraction tube
iodine and its compounds
workplace
air
