Determination of total arsenic, total inorganic arsenic and inorganic arsenic species in rice and rice flour by electrothermal atomic absorption spectrometry

► Novel and simple procedures for inorganic As speciation in rice were developed ► Optimization and full validation of all methods were performed ► Proficiency test (IMEP-107) proved the accuracy of the proposed methods ► Application to rice and rice flour samples was performed ► Total inorganic As was equal to (64 ± 19)% of total As in all samples.