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- Title
Discussion and Verification on the Technical Route of Traceability of Elemental Film Standard Samples.
- Authors
REN Lijun; HUANG Chong; FAN Shuang; DU Zhenyu; YIN Huimin; LI Yuwu
- Abstract
Elemental thin film standard sample is an essential experimental material for the determination of inorganic elements in atmospheric particulate matter samples by X-ray fluorescence spectrometry (XRF). The development of domestic element film standard samples that meet the requirements of metrologecal traceability is of great significance for establishing XRF calibration curves in analysis of atmospheric particulate matter and to reduce the cost of purchasing film standard samples for users in XRF laboratories. A technical route is proposed to use both ICP-OES based on the acid digestion system and XRF by direct measurement to determine the element content in film samples, which Is verified with the determination of rare earth elements in thin film samples. The feasibility of the acid digestion system and ICP-OES analysis method was explored with the coating soiid powder material. The target element recovery is 93. 3%-99. 7%. The experimental results show that the WD-XRF caiibration curve established based on the digestion CPES measurement resutts has a good iinear relationship (i. e. the correlation coefficient of each element ss 0.997 8-1.000) .The measurement resutt of the WD-XRF can meet the requirements of metrological traceability, as expected. Based on the precision of the fluorescence intensity data of the same batch of coated samples, the uniformity of the coating process was investigated. The relative standard dev!ation of intensity was from 0. 16% to 1. 5%. The evaluation data of uncertainty of measurement results shows that the fitting model errors of ICP-OES are the main components of uncertainty of measurement results for low content fitter membrane sample. The experimental results and the foundation for the subsequent collaborative analysis of standards for film samples of other series of elements.
- Publication
Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue, 2021, Vol 11, Issue 5, p60
- ISSN
2095-1035
- Publication type
Article
- DOI
10.3969/j.issn.2095-1035.2021.05.010