Development and quality inspection of standard samples of simulated atmospheric particulate mixed elements filter membrane
DU Zhen-yu1, 2, 3, ZHANG Bai-hui*4, HUANG Zhi-peng5, ZHANG Xuan-xiong6 HUANG Chong7, LI Yu-wu1, 2, 4
1. Environmental Development Centre of the Ministry of Ecology and Environment, Beijing 100029,China; 2. National Research Center for Environmental Analysis and Measurements, Beijing 100029, China; 3. State Environmental Protection Key Laboratory for Dioxin Pollution Control,Beijing 100029, China; 4. Guohuan Oasis (Gu'an) Environmental Technology Co., Ltd., Langfang 065500, China; 5. School of Chemical Science and Technology, Tongji University, Shanghai 200092, China; 6. School of Optical and Electronic Information Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; 7. Skyray Instrument, Kunshan 215300, China
Abstract：The standard of HJ 829-2017, which is concerning the determination of inorganic elements such as Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Pb, Sr and Ba in atmospheric particulate filter membrane sample by energy dispersive X-ray fluorescence spectrometry (ED-XRF), has been issued and implemented for several years. The standard sample of particulate filter membrane is of great significance for the establishment and evaluation of calibration curves. At present, there is only one standard sample for simulating particulate filter membrane (NIST SRM 2783, USA) in the market. But the price is expensive, and it is difficult to be used in quality control for the primary-level laboratories in routine analysis. If there is no relevant product with appropriate price and quality that meets the requirements, the quality control of XRF analysis for the testing of atmospheric particulate elements will be hardly implemented in primary-level laboratories. Refer to the preparation method of foreign simulated atmospheric particulate filter membrane, the standard sample of polluted soil sampled from Hunan was used as raw materials. After further pulverization, the fine particles were made into a suspension by using surfactant. Then the suspension was quantitatively and uniformly distributed on the porous filter membrane. Total 120 pieces of filter membrane samples were prepared in one batch and 14 of them were randomly selected for testing by 6 ED-XRF laboratories, one proton induced X-ray emission (PIXE) laboratory and one neutron activation analysis (NAA) laboratory. The determination accuracy and precision of measuring results of more than 20 elements on filter membrane were evaluated. The preliminary analysis results showed that the contents of Al, Fe, Zn, As, Ba, Ti and Pb were basically consistent with the results calculated based on the ratio of certified values of elements in soil standard sample. The relative standard deviations (RSD) of Al, Si, Fe, Ti, Mn, Zn, K, As and Pb were between 6.8% and 21%, which could basically meet the requirements of filter membrane samples for quality control. They could be provided to the primary-level laboratories for trial test. The ideas and plans for follow-up research work were proposed.
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