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


CONCLUSIONS
Portable X-ray fluorescence spectrometry is a simple, rapid, repeatable, and accurate method for the determination of lead on filter membrane.
Juntong
J
Liu
Yan
Y
Liu
Ya
Y
Chen
Yan
Y
Zhao
Tong
T
Wang
D000395:Air Pollutants, Occupational / Q000032:analysis*; D007854:Lead / Q000032:analysis*; D013052:Spectrometry, X-Ray Emission; D017132:Workplace
D000395:Air Pollutants, Occupational; D007854:Lead