Easy sample preparation and non-chromatographic method for determination of inorganic and total arsenic in rice samples.

The inorganic and total arsenic concentration in rice samples with different origins was determined by continuous hydride generation-atomic absorption spectrometry (HG-AAS) and inductivity coupled plasma mass spectrometry (ICP/MS). Only one sample preparation method was used for total arsenic and inorganic arsenic determination in rice samples. LOD and LOQ for HGAAS and ICPMS were 0.3, 1, and 0.003, 0.01 μg kg⁻¹, respectively. The relative standard deviation (RSD %) of the method was in the range of 5-15 %, and 7-25 % as the relative standard deviation of 3 replicates. The validation of the method was done using CRM NIST 1568b and IGI 1385 rice flour, successfully. This method was applied for the determination of inorganic arsenic and total in 72 rice samples from five different countries of origin. The average concentration of total arsenic was 370, 269, 214, 110, and 97 μg kg⁻¹; and inorganic arsenic was 64, 80, 92, 99, and 82 μg kg⁻¹ in the rice samples for Argentina (AR), Uruguay (UR), United States of America (USA), Iran (IR), and India (IN), respectively. [ABSTRACT FROM AUTHOR]