[便携式X射线荧光光谱法测定工作场所空气中的铅]

[Determination of lead in workplace air by portable X-ray fluorescence spectrometry].

作者信息

Liu Juntong, Liu Yan, Chen Ya, Zhao Yan, Wang Tong

出版信息

Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi. 2015 Apr;33(4):299-301.

Abstract

OBJECTIVE

To investigate the permance index ofof portable X-ray fluorescence spectrometer in the determination of lead on filter membrane and to provide data for the determination of lead in workplace air.

METHODS

Irradiated with X-ray, the lead would emit specific X-ray fluorescence during the process from the excited state back to the ground state. Rapid determination of lead was completed using fluorescence energy and wave length for qualitative analysis and fluorescence intensity for quantitative measurement. Under set conditions, a series of customized calibration samples were measured to create a standard curve for quantitative analysis of lead on filter membrane.

RESULTS

The regression equation obtained using a portable X-ray fluorescence spectrometer to determine the lead on filter membrane was y=0.004x-0.182 (r2= 0.9999). The linear range was 0.00 -10.40 mg/m3, the minimum detectable concentration was 0.53 µg/m3, and the minimum quantifiable concentration was 1.76µg/m3. The relative standard deviation (RSD) of within-run precision of samples with different concentrations was 0.48%-6.22%, the RSD of between-run precision was 2.51%-5.09%, and the degree of accuracy was in the calibration range of standard samples.

CONCLUSION

Portable X-ray fluorescence spectrometry is a simple, rapid, repeatable, and accurate method for the determination of lead on filter membrane.

摘要

目的

探讨便携式X射线荧光光谱仪测定滤膜上铅的性能指标，为工作场所空气中铅的测定提供数据。

方法

铅在X射线照射下，由激发态回到基态的过程中会发射出特定的X射线荧光。利用荧光能量和波长进行定性分析，荧光强度进行定量测定，完成铅的快速测定。在设定条件下，测定一系列定制的校准样品，绘制滤膜上铅定量分析的标准曲线。

结果

便携式X射线荧光光谱仪测定滤膜上铅得到的回归方程为y = 0.004x - 0.182（r2 = 0.9999）。线性范围为0.00 - 10.40 mg/m3，最低检出浓度为0.53 μg/m3，最低定量浓度为1.76 μg/m3。不同浓度样品批内精密度的相对标准偏差（RSD）为0.48% - 6.22%，批间精密度的RSD为2.51% - 5.09%，准确度在标准样品校准范围内。