论文部分内容阅读
目的按照《空气污染对人群健康影响监测工作手册(2015)PM_(2.5)采样及成分分析部分》规定的检验方法,验证该方法中汞元素在该实验室开展检测工作的适宜性。方法将模拟采样的石英滤膜用10 ml 5%的硝酸,在70℃水浴中超声浸提3 h,定容,对方法的回归曲线、检出限、定量下限、精密度、准确度等进行测定。结果方法的标准曲线为:y=5 613x+0.1 517,相关系数为r=0.998 4,检出限为0.04μg/L,定量下限为0.16μg/L,相对标准偏差RSD在2.853%~6.475%之间,回收率在91.5%~102%之间。结论该方法简便,快速,灵敏度高,线性范围宽,适合于该实验室开展PM_(2.5)颗粒物中汞的测定工作。
Objective To verify the suitability of mercury for the detection of mercury in this laboratory in accordance with the test method specified in the “PM 2.5 (Sampling and Analysis of Components of Air Pollution Monitoring of People’s Health) (2015)” section. Methods The simulated sample quartz membrane was extracted with 10 ml of 5% nitric acid and ultrasonicated in a water bath at 70 ℃ for 3 h. The regression curve, detection limit, limit of quantification, precision and accuracy of the method were determined Determination. Results The standard curve of the method was: y = 5 613x + 0.1 517, the correlation coefficient was r = 0.998 4, the detection limit was 0.04μg / L, the lower limit of quantitation was 0.16μg / L, RSD was 2.853% ~ 6.475% Between the recovery rate of 91.5% ~ 102%. Conclusion The method is simple, rapid, sensitive and has wide linear range. It is suitable for the determination of mercury in PM 2.5 particles in this laboratory.