Abstract:A method for determining cadmium content in rice noodles using microwave digestion-inductively coupled plasma-optical emission spectrometry （ICP-OES） was studied. The experiment compared the results of two different digestion methods， namely wet digestion and microwave digestion， as well as the pretreatment results of samples with and without overnight acidification. The instrument detection conditions， including detection wavelength， radio frequency power， and pump speed， were optimized. The results showed that the standard curve showed a good linear relationship within the range of 1-30 μg/L， with a correlation coefficient r≥0.999. When the sample weight was 0.5 g， the detection limit of the method was 0.004 mg/kg， and the lower limit of determination was 0.012 mg/kg. The results of two quality control samples with different concentrations were within the range of its deviation range， and the relative standard deviations （n=6） were 1.11% and 4.60%， respectively. Compared with the determination of cadmium by inductively coupled plasma mass spectrometry and graphite furnace atomic absorption spectrometry （GFAAS）， the test results were in good agreement. Therefore， this method was suitable for the determination of cadmium content in rice noodles.