建立便携式高灵敏X射线荧光光谱法直接快速测定小麦粉中砷、镉、铅含量的分析方法。
取部分样品至进样杯中,然后直接将进样杯放入便携式高灵敏X射线荧光光谱仪进行检测,并对仪器检测时间、样品紧实度、检测厚度等条件进行优化,将最优条件应用于小麦粉的检测。
各元素的精密度的相对标准偏差(RSD,
该方法精密度比较高,检出限与定量限良好,基本上能够满足小麦粉中多种重金属元素同时快速检测的要求。
A portable high-sensitivity X-ray fluorescence spectrometry method was established to directly and quickly determine the content of arsenic, cadmium and lead in wheat flour.
Part of the sample was put into the sample cup, and then directly put the sample cup into the portable high-sensitivity X-ray fluorescence spectrometer for testing. The testing time, sample compactness, and testing thickness of the instrument were optimized and applied to the detection of different types of wheat flour.
The relative standard deviation (RSD,
The method has relatively high precision, good detection limit and quantification limit, and can meet the requirements of simultaneous rapid detection of multiple heavy metal elements in wheat flour.