Method and influencing factors research on the determination of 20 elements in fly ash using portable XRF
Incineration of garbage produces a large amount of fly ash,which contains a high level of heavy metals and leaches out highly toxic substances,posing significant threats to human health and the environment.The commonly used fly ash elemental analysis methods require a complex pretreatment and a long detection time,which cannot achieve the timely detection of fly ash and provide reliable guidance for the reagent dosage during the harmless disposal process.Portable XRF spectrometers have the advantages of no requirement for pre-treatment,rapid measurement,and simultaneous analysis of multiple elements.Therefore,this study adopted the method of using a portable XRF to determine the content of 20 elements in fly ash,and investigated the linear range,precision,and accuracy of this analysis method.Additionally,the key factors(vacuum degree,measurement film type,grinding,and drying)affecting the measurement accuracy were explored.The study showed that the relative standard deviation was 0.03％to 7.58％,and the relative error(RE)was within the range of±20％,indicating good reproducibility,accuracy,and precision of the method.The selection of vacuum degree and measurement film type can affect the performance of XRF.The results can provide suggestions and reference for the rapid monitoring and evaluation of elements in fly ash.
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