石墨爐原子吸收光譜法測定糧食中鉛元素的方法研究

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Research on the Method of Determining Lead Elements in Grains by Graphite Furnace Atomic Absorption Spectrometry

LI Xiaojin （Jinchang Center for Disease Control and Prevention， Jinchang 7371oo， China）

Abstract： Objective： To establish a method for determining the lead content in grains using graphite furnace atomic absorption spectrometry. Method： The microwave digestion method was used for the pretreatment of grain samples，and the test solution was injected into the graphite furnace atomic absorption spectrometer， where the samples were ashed and atomized to determine the lead content. Result： A good linear relationship was found when the lead element concentration was between 0μg?L-1 to 40μg?L-1 ，with a correlation coefficient greater than 0.999. The recovery rate of added standards was between 77.5% to 92.1% ，and the relative standard deviation in precision experiments was 1.7% to 5.7% .Conclusion： The method shows good detection linearity， high sensitivity， high accuracy， and good precision， making it suitable for determining the lead content in grains.

Keywords： microwave digestion; graphite furnace atomic absorption spectrometry; grains; lead

隨著工業(yè)農(nóng)業(yè)的發(fā)展，環(huán)境污染問題越發(fā)突出，鉛元素通過生物富集作用等逐漸出現(xiàn)在農(nóng)作物產(chǎn)品及加工性食品中[1-2]。（剩余4081字）