Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Henri Dunant Road, Bangkok 10330, Thailand.
J Food Prot. 2012 Apr;75(4):771-4. doi: 10.4315/0362-028X.JFP-11-494.
Concentrations of total and inorganic arsenic were determined in 180 samples of polished and brown rice of three rice types, namely white, jasmine, and sticky, and 44 samples of rice bran from these three rice types purchased in Thailand. Concentrations (expressed in nanograms per gram) of inorganic arsenic in polished white, jasmine, and sticky rice were 68.3 ± 17.6 (with a range of 45.0 to 106), 68.4 ± 15.6 (41.7 to 101), and 75.9 ± 24.8 (43.5 to 156), respectively, while those in the three brown rice samples were 124 ± 34.4 (74.5 to 193), 120 ± 31.6 (73.1 to 174), and 131 ± 35.6 (78.0 to 188), respectively. Inorganic arsenic concentrations (expressed in nanograms per gram) in rice bran produced from the three rice types were 633 ± 182 (375 to 919), 599 ± 112 (447 to 824), and 673 ± 195 (436 to 1,071), respectively. Rice bran contained concentrations of total and inorganic arsenic approximately seven and nine times higher, respectively, than those found in the corresponding polished rice. The levels of inorganic arsenic in the three rice types of both polished and brown rice were within the only published regulatory limit of 200 ng/g.
测定了三种大米（白米、茉莉香米和糯米）的 180 个抛光米和糙米样本以及这三种大米的 44 个米糠样本中的总砷和无机砷浓度。抛光白米、茉莉香米和糯米中无机砷的浓度（以纳克/克表示）分别为 68.3 ± 17.6（范围为 45.0 至 106）、68.4 ± 15.6（41.7 至 101）和 75.9 ± 24.8（43.5 至 156），而三种糙米样本中无机砷的浓度分别为 124 ± 34.4（74.5 至 193）、120 ± 31.6（73.1 至 174）和 131 ± 35.6（78.0 至 188）。三种大米的米糠中无机砷的浓度（以纳克/克表示）分别为 633 ± 182（375 至 919）、599 ± 112（447 至 824）和 673 ± 195（436 至 1071）。米糠中总砷和无机砷的浓度分别约为相应抛光米的 7 倍和 9 倍。三种大米的抛光米和糙米中的无机砷含量均在已公布的 200 纳克/克的监管限量范围内。
