To establish methods for the detection of inorganic arsenic in rice and rice-based foodstuff and compare the results deviation of various extracting and/or instrumental process. MethodsThe extraction conditions for inorganic arsenic extraction in rice were 0.15mol /L nitric acid or 0.3mol/L TFA; heat-assistant extraction 2h,95℃; ultrasonic 2h,75℃; microwave-assist 1h ,90℃. Then the extracts were separated by an anion exchange column Hamilton PRP X-100(250mm×4.1mm, 10μm) and detected by ICP-MS and HG-AFS respectively. Results The determination of inorganic arsenic of these two methods was good. The recoveries of spiked samples were 94.8%～111.7% and 91.9%～96.0%, and the relative standard deviations (RSD,n=6) were below 5.8%. The results were satisfying for control sample (SRM1568a) and rice samples. Conclusion The methods were simple, accurate and fast for the determination of inorganic arsenic in rice and rice-based foodstuff. There was no significant statistic difference among the results.