摘要
应用固体测汞仪,采用多标准土壤样品（n〉20）绘制校准曲线法和单一标准土壤样品绘制校准曲线法,分别对土壤中的汞进行测定。结果表明,两者的方法检出限分别为0.30、1.49 ng,平行样（n=6）的相对标准偏差分别为3.6%~4%、5.4%~9.0%,90 d内的重复性精密度为4.1%,对国家土壤标样进行测定,结果与标准值相符。表明与单一标准土壤样品绘制校准曲线法相比,多标准土壤样品绘制标准曲线法具有更好的精密度、更低的检出限,更强的适用性,并且由于校准曲线长期稳定性,有效缩短土壤中汞的检测周期。
Total mercury in the state standard soil samples were determined using direct analyzer with solid sampling by multistate standard soil-calibration curve and single-state standard soil-calibration curve. The results showed that the detection limits were 0. 30 and 1. 49 ng,the relative standard deviations of parallel samples（ n = 6） were 3. 6%-4% and 5. 4%-9. 0%,the repeatability precisions in 90 days was 4. 1%. This suggested that the method of multi-state standard soil-calibration curve had the lower detection limit,the better replicability precision,and the better reproducibility precision.
出处
《中国环境监测》
CAS
CSCD
北大核心
2016年第3期126-128,共3页
Environmental Monitoring in China
关键词
汞
固体测汞仪
土壤
trace mercury
direct analyzer with solid sampling
soil
