目的:建立检测植物油中砷含量的石墨炉原子吸收光谱方法。方法:样品经微波消化后,采用硝酸镁作为基体改进剂,石墨炉原子吸收光谱法测定。结果:方法线性范围为0μg/L～20μg/L,相关系数为0.9997,方法检出限为0.006 mg/kg,RSD为2.7%～3.2%,加标回收率为84.7%～99.0%。结论:本法简便、灵敏度高、重现性好,适用于植物油中砷的测定。 Objective: To establish a method for the determination of arsenic in vegetable oil by graphite furnace atomic absorption spectrometry. Methods: Samples were digested by microwave and magnesium nitrate was used as matrix modifier and determined by graphite furnace atomic absorption spectrometry. Results: The linear range of the method was 0μg / L ~ 20μg / L with a correlation coefficient of 0.9997. The detection limit was 0.006 mg / kg and the RSD was 2.7% -3.2%. The recoveries were in the range of 84.7% -99.0%. Conclusion: This method is simple, sensitive, reproducible, suitable for the determination of arsenic in vegetable oil.