Evaluation of a nitric acid-based partial-digestion method for selective determination of inorganic arsenic in rice

被引:15
作者
Hamano-Nagaoka, Megumi [1 ]
Nishimura, Tsutomu [2 ]
Matsuda, Rieko [1 ]
Maitani, Tamio [1 ]
机构
[1] Natl Inst Hlth Sci, Setagaya Ku, Tokyo 1588501, Japan
[2] Japan Food Res Labs, Tokyo 2060025, Japan
来源
JOURNAL OF THE FOOD HYGIENIC SOCIETY OF JAPAN | 2008年 / 49卷 / 02期
关键词
arsenic; inorganic arsenic; rice; HPLC/ICP-MS; partial digestion; nitric acid;
D O I
10.3358/shokueishi.49.95
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
Arsenic (As) uptake in human occurs via the food chain mainly. The Joint FAO/WHO Expert Committee on Food Additives has established the provisional tolerable weekly intake level for As as an inorganic As (iAs) value, because iAs in food is much more toxic than organic As. In this study, we studied an acid based partial-digestion method for the complete extraction of arsenicals from rice. HPLC/ICP-MS was used to determine the concentration of iAs selectively. The conditions adopted to extract arsenicals from a 0.5 g of finely ground rice sample were addition of 2 mL of 0.15 mol/L nitric acid and heating at 80 degrees C for 2 hr. The LOD and LOQ for iAs were 0.0024 and 0.0079 mg/kg dry weight, respectively. Recovery studies showed good accuracy. When the method was applied to ten short-grain brown rice samples, the iAs concentrations. were 0.108-0.227 mg/kg dry weight and the total As concentrations were 0.118-0.260 mg/kg dry weight. Although dimethylarsinic acid was also detected in most samples, the percentage of iAs content in total As content was 62.2-96.3%. Thus, iAs was the principal As species in the short-grain brown rice samples tested.
引用
收藏
页码:95 / 99
页数:5
相关论文
共 20 条
[1]   Speciation of arsenic in fish tissue using microwave-assisted extraction followed by HPLC-ICP-MS [J].
Ackley, KL ;
B'Hymer, C ;
Sutton, KL ;
Caruso, JA .
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 1999, 14 (05) :845-850
[2]   State-of-the-art ion chromatographic determination of inorganic ions in food [J].
Buldini, PL ;
Cavalli, S ;
Trifirò, A .
JOURNAL OF CHROMATOGRAPHY A, 1997, 789 (1-2) :529-548
[3]  
D'Amato M, 2004, J AOAC INT, V87, P238
[4]   Determination of arsenic species: A critical review of methods and applications, 2000-2003 [J].
Francesconi, KA ;
Kuehnelt, D .
ANALYST, 2004, 129 (05) :373-395
[5]   An evaluation of sample dispersion media used with accelerated solvent extraction for the extraction and recovery of arsenicals from LFB and DORM-2 [J].
Gallagher, PA ;
Murray, S ;
Wei, XY ;
Schwegel, CA ;
Creed, JT .
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 2002, 17 (06) :581-586
[6]   Determination of total and speciated arsenic in rice by ion chromatography and inductively coupled plasma mass spectrometry [J].
Heitkemper, DT ;
Vela, NP ;
Stewart, KR ;
Westphal, CS .
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 2001, 16 (04) :299-306
[7]   Benefits of high resolution IC-ICP-MS for the routine analysis of inorganic and organic arsenic species in food products of marine and terrestrial origin [J].
Kohlmeyer, U ;
Jantzen, E ;
Kuballa, J ;
Jakubik, S .
ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 2003, 377 (01) :6-13
[8]  
MAITANI T, 2006, FOOD EVALUATION PREV, P229
[9]   A comparison of automated and traditional methods for the extraction of arsenicals from fish [J].
McKiernan, JW ;
Creed, JT ;
Brockhoff, CA ;
Caruso, JA ;
Lorenzana, RM .
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 1999, 14 (04) :607-613
[10]   The speciation of arsenic in biological tissues and the certification of reference materials for quality control [J].
McSheehy, S ;
Szpunar, J ;
Morabito, R ;
Quevauviller, P .
TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 2003, 22 (04) :191-209