不同检测方法测定蚕豆中锌、锰、铁、铜元素结果的一致性研究

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Comparative Study on the Consistency of Zinc， Manganese， Iron， and Copper Determination in Broad Beans Using Different Analytical Methods

WEI Bin， LIU Yueyue

（Zibo Center forDisease Controland Prevention，Zibo KeyLaboratory for Monitoring and AnalysisofEnvironmentalOrganic Polution and Population Health， Zibo Enginering Technology Research and Development Center forFood Risk Monitoring， Zibo ， China）

Abstract： Objective： To investigate the consistency of the results for the determination of zinc， manganese， iron，and copper inbroad beans by inductivelycoupled plasma optical emisson spectrometry （ICP-OES），inductively coupled plasma mass spectrometry （ICP-MS）， and flame atomic absorption spectrometry （FAAS）. Method： 0.2～ 0.3g broad bean powder was added to 8mL ofnitric acid for microwave digestion.After removing the acid， the solution was quantitatively transferred to a 10mL volumetric flask with pure water to make up the volume. The sampleswere then determined by ICP-OES， ICP-MS，and FAAS，respectively. Pairwise t -testswere performed to analyze the consistency of the results. Result： After uncertainty assessment， the t -values for the determination of zinc and copper were less than t95%，10 （2.23）; the t. -values for the determination of iron and manganese were partially greater than t95%，10 （2.23）. Conclusion： After uncertainty assessment， the determination results of zinc and copper by difrent methods were consistent; the determination results of iron and manganese by some methods were inconsistent after statistical analysis.

Keywords： metal elements; t -test; uncertainty evaluation; consistency

分析检测

食品安全国家标准中锌、锰、铁、铜元素的测定方法主要包括火焰原子吸收法（FlameAtomicAbsorptionSpectrometry，FAAS）、电感耦合等离子体发射光谱法（Inductively Coupled Plasma Optical EmissionSpectrometry，ICP-OES）、电感耦合等离子体质谱法（Inductively Coupled Plasma Mass Spectrometry，ICP-MS）等。（剩余6200字）