Abstract:In order to meet the demand of rapid quantitative detection of cadmium in grain purchase site，the parameters such as the limit of detection，limit of quantitation，accuracy，repeatability，stability and interinstrument agreement，detection duration of cadmium in grain，measured by rapid quantitative method of colloidal gold technique based on competitive reaction of enzyme receptors，were tested.The results showed that the limit of detection of the method was 17.23 μg/kg，and the limit of quantitation was 48.84 μg/kg，which both met the Chinese national standard for the detection of cadmium in grain.There was no significant difference compared with the results measured by graphite furnace atomic absorption spectrometry.For a single sample，it can be completed within 35 minutes from weighing to reading the data.The repeatability，standard deviation and range of stability，and Inter-instrument agreement t-test values are in accordance with the regulations of LS/T 6402-2017"Inspection of Grain and Oil-The General Principle of Standard Adaptability Verification and Evaluation Results for Equipments and Testing Methods".