[Simultaneous determination of Cr, Cd, Br, Pb, and Hg of regulated substances in electrotechnical products by XRF spectrometry].
The objective of the present research was to develop a nondestructive technique for the analysis of heavy elements of regulated substances in electrotechnical products using an XRF spectrometer. Reference samples were prepared within-house reference materials containing the elements Cr, Cd, Br, Pb, and Hg, and calibration curves of all elements exhibited a good linearity from 100 to 1 500 mg x kg(-1). Thus, the calibration curve method was effective in the determination of heavy elements in electrotechnical products. The minimum detection limits (MDLs) calculated with reference material (BCR-681) ranged from 0. 27 (Br) to 1. 10 mg x kg(-1) (Cd). The interference from background and spectra overlap was discussed. The matrix effect was corrected by experience coefficients, using scattered radiation as an internal standard. The accuracy of the method was evaluated by the analysis of certified reference material of BCR-681. The results are in agreement with certified values with a precision of less than 5. 0%.
Song
Wu-yuan
WY
Guangdong Exit-Entry Inspection and Quarantine Bureau, Guangzhou 510623, China.
Zheng
Jian-guo
JG
Xiao
Qian
Q
Zhou
Ming-hui
MH
Liu
Zhi-hong
ZH
Liu
Li
L