title: The extraction and speciation of arsenic in rice flour by HPLC-ICP-MS.
abstract: Several solvent mixtures and techniques for the extraction of arsenic (As) species from rice flour samples prior to their analysis by HPLC-ICP-MS were investigated. Microwave-assisted extraction using water at 80 degrees C for 30 min provided the highest extraction efficiency. Total recoveries of extracted As species were in good agreement with the total As concentrations determined by ICP-MS after microwave-assisted acid digestion of the samples. Arsenite [As(III)], arsenate [As(V)] and dimethylarsinic acid (DMAA) were the main species detected in rice flour samples.
authors.affiliation: Inorganic Analytical Chemistry Division, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8563, Japan. tomohiro-narukawa@aist.go.jp
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Narukawa
authors.forename: Kazumi
authors.initials: K
authors.lastname: Inagaki
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Kuroiwa
authors.forename: Koichi
authors.initials: K
authors.lastname: Chiba
mesh_terms: D001151:Arsenic / Q000032:analysis* / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D013058:Mass Spectrometry / Q000379:methods*; D008872:Microwaves; D012275:Oryza / Q000737:chemistry*; D012997:Solvents; D014465:Ultrasonics
chemical_list: D012997:Solvents; D001151:Arsenic