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      Distribution of total aflatoxins in milled fractions of hulled rice.

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          Abstract

          Two varieties of hulled rice artificially contaminated with aflatoxins at five different levels were processed by dehulling and polishing methods. Contamination levels ranged from 356 to 818 microg/kg and from 244 to 645 microg/kg in medium and long grain rice, respectively. After physical processing, four different milled fractions were obtained (hull, bran, polished broken grains, and polished whole kernels). The fractions were analyzed for total aflatoxins (B1, B2, G1, and G2) by enzyme-linked immunosorbent assay (ELISA). Aflatoxins were removed in fractions intended for human consumption (polished broken grains and polished whole kernels) at rates up to 97%. They were found throughout all fractions, but higher contamination levels were detected in hull and bran fractions than in unprocessed kernels and polished fractions. Regardless of the rice variety, the aflatoxin distribution pattern depended on the initial contamination level and type of milled fraction but not on the duration of polishing.

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          Author and article information

          Journal
          J. Agric. Food Chem.
          Journal of agricultural and food chemistry
          American Chemical Society (ACS)
          0021-8561
          0021-8561
          Apr 04 2007
          : 55
          : 7
          Affiliations
          [1 ] Food Technology Department, Lleida University, Rovira Roure 191, 25198 Lleida, Spain.
          Article
          10.1021/jf063252d
          17348675
          d24ff6f3-e9fa-4b09-aade-6323c2e74e57
          History

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