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Suzhou, China

Li Q.,Skyray Instrument Co. | Huang W.-Y.,Skyray Instrument Co. | Wang Y.-G.,Skyray Instrument Co. | Wu M.,Skyray Instrument Co.
Yejin Fenxi/Metallurgical Analysis | Year: 2012

The content of Pb element in iron and steel has been investigated in detail by energy dispersive X-ray fluorescence spectrometry (EDXRF). It is showed that, FeK α sum-peak was the main interference factor affecting the accuracy of the testing. The formation mechanism of the sum-peak was analyzed, and a mathematical model was established. By calculating the occurrence probability of sum-peaks was obtained and experimentally verified. The sum-peak correction working curve (SPCWC) was established and used for the determination of Pb in iron samples, and the results were consistent with those from atomic absorption spectrometry (AAS). The detection limit of the method was 24.1 μg/g. Twelve times determinations for standard sample with lead mass fraction of 170 μg/g were conducted, and the relative standard deviation (RSD) obtained was 3.26%.

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