| The topic of this paper was mainly comes from “863Project” resources andenvironment technology subject” High-Precision Spectrum Detection InstrumentsDevelopment”, Project Number:2012AA061803.At present, the atmospheric pollution of the environment was attracting more andmore attentions in all kinds of the environmental pollution problems, fog and itsheavy metal particles was one of the most typical representative. Doing the qualitativeand quantitative research of atmospheric particulate matter, provide with high qualitytimely atmospheric concentration data was the key steps of the evaluation and sourceof atmospheric pollution. From the quantitative analysis view of metal elementconcentration of atmospheric particulates, can be divided into two categories:laboratory analysis and field analysis. The former has taken the gathered filter bysamplers back to the lab for further chemical analysis and get the results, its reliabilitywas high but the transportation and laboratory processing, the membrane has the highrequest and time-consuming; The latter was in atmospheric sampling site, using fieldportable X ray fluorescence (FPXRF) analyzer in rapid determination of multielements on the sampling filter, get the content of metal elements in atmosphericparticulate matter at the real time. Since FPXRF is a relatively analysis, theinstrument calibration and sample standard scale production has become one of thepriorities. Through market research, the standard scale sample available in the markettoday was mainly produced by the American National Standards Institute standard forPM2.5sample NIST SRM2783-based. But given the large gap between the matrixcompositions, the different content of each element, the complicated productionmethods, and the more expensive price and other reasons do not meet the requirements. Combined with a variety of literature, proposes the use of chelation-method of making a standard scale sample extraction, and achieved certain results.with the measurement of already collected PM2.5membrane, get the results andanalysis the irregular situations, paper made some of the following outcomes:1. establishes the use of chelation-scale extraction method to produce standardsamples, and this method has strong controllability, easy steps, and reliable contentand other characteristics.2. FPXRF method also has the weak matrix effect, the lower limit of detection,the simplified measurement formulas and the fewer amounts of sample dosage andother advantages, in the production process of standard scale samples we produced anumber of thin samples used to calibrate the instrument and made correlationmeasurements of subsequent sampling filter.3. The analysis results of the relevant monitoring points sampling membraneshows that: First, the concentration values of analyte in the night-time weresignificantly higher than the rest of the two periods, which is more consistent with thetheoretical explanation of night closed system; Secondly, the impact of each elementmeasured value and the weather is also more closely, the impact of human activitieson the various elements are also important factors (eg Pb element) can not be ignored.Then, the measurement results on April3are a better explanation for the fact that theatmospheric environment at that time is light pollution; Finally, with reference tospecific national standards, the measurement results are within the upper range ofvalues, the overall regional atmospheric environmental quality is better. |
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