Abstract
Rice (Oryza sativa) is one of the main foods consumed by the Brazilian population. A total of 268 rice samples of different subtypes (white, parboiled and brown) cultivated and collected from different regions of Brazil from October 2014 to February 2019 were analysed for total arsenic and its chemical species by inductively coupled plasma mass spectrometry (ICP-MS) and by high performance liquid chromatography coupled to mass spectrometry (HPLC-ICP-MS). The calculated average of total arsenic in all analysed rice subtypes was 0.109 mg kg−1. When evaluated by subtypes, of the range of arsenic concentrations were: 0.004 to 0.288 mg kg−1 for white rice; 0.100 to 0.296 mg kg−1 for brown rice; and 0.100 to 0.220 mg kg−1 for parboiled rice. Of the analysed samples, less than 10% of the total samples had values greater than 0.200 mg kg-1; inorganic arsenic species represented 58% of the total arsenic measured in the samples; and none of the 22 analysed samples presented an inorganic arsenic value above the limit established by the European Commission. Although the samples showed lower values than the legislation limit, it is crucial to ensure continuity when monitoring arsenic rice concentrations because arsenic contamination can generate great damage to public health.
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