Title of article :
Speciation of arsenite and arsenate in rice grain – Verification of nitric acid based extraction method and mass sample survey
Author/Authors :
Huang، نويسنده , , J.-H. and Fecher، نويسنده , , P. and Ilgen، نويسنده , , G. and Hu، نويسنده , , K.-N. and Yang، نويسنده , , J.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
7
From page :
453
To page :
459
Abstract :
Arsenite and arsenate speciation was performed in 121 commercially purchased samples of 12 rice types to understand their relative relevance in rice grain. General effectiveness of a recently developed extraction protocol based on 0.28 M nitric acid at 95 °C was verified by checking the recovery of total grain arsenic and by comparing arsenic speciation in NIST-CRM-1568a, NMIJ-CRM-7503a and IMEP-107 with certificated and literature values. The arsenic speciation highlights the predominance of arsenite in 115 and dimethylarsinic acid in six samples and common minor components including arsenate, monomethylarsonic acid and two unknown arsenical species. Our data also indicate potential influences of other trace elements on As speciation in rice grain. Averagely, arsenite accounts for 90% of inorganic grain arsenic regardless of geographic origin, rice type, grain size, cultural practice and polish treatment. The high arsenite predominance indicates an elevated toxic effect of arsenic in rice than is perceived to date.
Keywords :
rice grain , Arsenate , Nitric acid extraction , Arsenic speciation , Arsenite
Journal title :
Food Chemistry
Serial Year :
2012
Journal title :
Food Chemistry
Record number :
1966531
Link To Document :
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