title: Total and inorganic arsenic in rice and rice bran purchased in Thailand.
abstract: 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.
authors.affiliation: Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Henri Dunant Road, Bangkok 10330, Thailand. suthep.r@chula.ac.th
authors.forename: Suthep
authors.initials: S
authors.lastname: Ruangwises
authors.forename: Piyawat
authors.initials: P
authors.lastname: Saipan
authors.forename: Bundit
authors.initials: B
authors.lastname: Tengjaroenkul
authors.forename: Nongluck
authors.initials: N
authors.lastname: Ruangwises
mesh_terms: D001151:Arsenic / Q000032:analysis*; D020261:Arsenic Poisoning / Q000517:prevention & control; D003257:Consumer Product Safety; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D012275:Oryza / Q000737:chemistry*; D013785:Thailand
chemical_list: D001151:Arsenic