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Arsenic (As) plays an important role in rice production as vast soils used for rice cultivation contain As. To understand how rice plants deal with inorganic As (III) and As (V) and organic As in their tissue, it is important to obtain specific information on how much and what species of As are present in which tissue of the rice plant. The protocol presented here allows to analyse the As contents and As speciation in roots, shoots, and husks of rice plants, and thus permits direct comparison of the As contents of these rice plant tissues.