Abstract:The limit of detection，limit of quantitation，accuracy，repeatability，detection time and applicability of lead in grain were determined by graphite furnace atomic absorption spectrometry and rapid quantitative method of colloidal gold technique，which provided a reliable basis for selection of detection methods of lead in grain.The results showed that the limit of detection of different grains was different，in which wheat was the lowest，maize was the second，and rice/brown rice was the highest.The limit of detection and the limit of quantitation of the two methods met the quality control requirements of the determination of lead in grain，and the limit of graphite furnace atomic absorption spectrometry was lower.There was no significant difference in the detection results of positive samples of rice/brown rice，wheat and maize with different concentrations.The precision of the two methods can meet the requirements of Chinese standard for the repeatability test of lead in rice/brown rice，wheat and maize.For a single sample from weighing to reading the data，it takes 12 hours by graphite furnace atomic absorption spectrometry，while rapid quantitative method of colloidal gold technique can be completed within 35 minutes.