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目的建立职业接触者尿汞的直接测汞仪方法。方法尿液直接采用热分解齐化法原子吸收法进行检测。结果方法的线性范围为1.6μg/L~100.0μg/L,回归方程为y=0.005 08x+0.002 8(r=0.999 6);批内相对标准偏差为0.53%~1.56%,批间相对标准偏差为1.51%~3.57%;3种浓度的尿样的加标回收率为91.6%~100.0%;方法的检出限为0.48μg/L,定量限为1.59μg/L。最佳仪器条件:尿样在200℃干燥2 min,1.5 min内干燥温度升至650℃,最后灰化2 min。本研究优化的常见金属对本研究结果无干扰。结论该方法操作简便快速,各项指标可满足职业卫生尿汞监测的相关要求。
Objective To establish a direct mercury detector for mercury exposure in occupational exposure. Methods Urine was directly detected by thermal decomposition and atomization method. Results The linear range of the method was 1.6μg / L ~ 100.0μg / L, and the regression equation was y = 0.005 08x + 0.002 8 (r = 0.999 6). The relative standard deviations in the batch ranged from 0.53% to 1.56%. The relative standard deviations And 1.51% ~ 3.57%. The spiked recoveries were 91.6% ~ 100.0% for three kinds of urine samples. The detection limit was 0.48μg / L and the limit of quantification was 1.59μg / L. The best instrument conditions: the urine samples were dried at 200 ℃ for 2 min, the drying temperature increased to 650 ℃ within 1.5 min, and finally ashed for 2 min. The common metals optimized in this study did not interfere with the results of this study. Conclusion The method is simple and quick to operate, and all indexes can meet the requirements of urinary mercury monitoring in occupational hygiene.