Preparation and Application of Quality Control Filter Membrane for Pb and As in Atmospheric Particulate Matter
In order to fill the gap of atmospheric particulate matter filter membrane quality control samples in the field of ecological environment monitoring,ensure the accuracy of particulate matter composition analysis results,and objectively and truly reflect the detection ability and technical level of metal elements in atmospheric particulate matter,the author prepared atmospheric particulate matter filter membrane quality control samples,which were represented by the Pb and As in atmospheric particulate matter.By means of laboratory comparison,a total of 119 ecological environment inspection and testing institutions at all levels and of various types were organized nationwide to carry out practical application and verification.The results showed that the uniformity and stability of the two elements in the developed filter media were good,which met the requirements of capability verification samples.The precision of the laboratory test results of Pb and As was consistent with the standard method,and the robust mean value obtained by statistics was close to the sample preparation concentration,indicating that the developed filter membrane sample had a better application effect.The preparation cost of the filter membrane is economical and has strong operability,and it can be considered as a quality control sample for metal element analysis of particulate matter in daily monitoring.The results of laboratory comparison and evaluation showed that the satisfaction rates of Pb and As were 86.6%and 80.7%,respectively,indicating that the detection technology of Pb and As in particulate matter of ecological environment monitoring institutions was generally good.
atmospheric particulate matterPb and Asfilter membranelaboratory comparison
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