Heat-Assisted Aqueous Extraction of Rice Flour for Arsenic Speciation Analysis

Narukawa, Tomohiro; Chiba, Koichi

doi:10.1021/jf101317n

Cited by 52 publications

(55 citation statements)

References 10 publications

(11 reference statements)

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“…It is estimated that in many countries rice may contribute up to 50 % of the daily intake of protein, and in Asian countries it is a staple food. Moreover, rice is also extensively produced and consumed in Europe and in the United States [1,2]. From the point of view of health, rice is of interest because many types may contain higher contents of As than other food of terrestrial origin.…”

Section: Introductionmentioning

confidence: 99%

A fully validated method for the determination of arsenic species in rice and infant cereal products

Llorente-Mirandes

Calderón

López-Sánchez

et al. 2012

Pure and Applied Chemistry

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A full validation of inorganic arsenic (iAs), methylarsonic acid (MA), and dimethyl arsinic acid (DMA) in several types of rice and rice-based infant cereals is reported. The analytical method was developed and validated in two laboratories. The extraction of the As species was performed using nitric acid 0.2 % and hydrogen peroxide 1 %, and the coupled system liquid chromatography-inductively coupled plasma-mass spectrometry (LC-ICP-MS) was used for speciation measurements. Detection limit (DL), quantification limit, linearity, precision, trueness, accuracy, selectivity, as well as expanded uncertainty for iAs, MA, and DMA were established. The certified reference materials (CRMs) (NMIJ 7503a, NCS ZC73008, NIST SRM 1568a) were used to check the accuracy. The method was shown to be satisfactory in two proficiency tests (PTs). The broad applicability of the method is shown from the results of analysis of 29 samples including several types of rice, rice products, and infant cereal products. Total As ranged from 40.1 to 323.7 μg As kg -1 . From the speciation results, iAs was predominant, and DMA was detected in some samples while MA was not detected in any sample.

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Section: Introductionmentioning

confidence: 99%

A fully validated method for the determination of arsenic species in rice and infant cereal products

Llorente-Mirandes

Calderón

López-Sánchez

et al. 2012

Pure and Applied Chemistry

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“…Several authors use it to assess the accuracy of iAs methods. 39,40,180,183,190,191,218,[237][238][239][240][241][242] The mean value for iAs content of the values reported in Table 2 is 0.0823 AE 0.0037 mg As kg À1 (mean value AE SD, n ¼ 16 reported results) which is in perfect agreement with the certified value of iAs: 0.0841 AE 0.0030 mg As kg À1 (the sum of the certified As(III) and As(V) values AE the square root of the sum of their squared uncertainties). Nine of the published values use different extraction methods, such as MW-assisted extraction (MAE) or heating in a block with several extractants such as HNO 3 , HNO 3 /H 2 O 2 , HClO 4 , H 2 O, or enzymes, and with final measurement via the coupled HPLC-ICP-MS technique, which allows iAs to be separated from methylated species and the iAs species to be determined satisfactorily.…”

Section: -247mentioning

confidence: 99%

“…Narukawa et al 185 propose specific monitoring test for iAs in rice, based on a previously developed and validated method, using water as the iAs extractant. 180 The method is applied to 20 white rice flour samples. For separation a C18 column, with sodium 1-butanesulfonate/malonic acid/tetramethylammonium hydroxide/MeOH as the mobile phase, was used and arsenobetaine was used as the internal standard.…”

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confidence: 99%

Inorganic Arsenic Determination in Food: A Review of Analytical Proposals and Quality Assessment Over the Last Six Years

2016

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Here we review recent developments in analytical proposals for the assessment of inorganic arsenic (iAs) content in food products. Interest in the determination of iAs in products for human consumption such as food commodities, wine, and seaweed among others is fueled by the wide recognition of its toxic effects on humans, even at low concentrations. Currently, the need for robust and reliable analytical methods is recognized by various international safety and health agencies, and by organizations in charge of establishing acceptable tolerance levels of iAs in food. This review summarizes the state of the art of analytical methods while highlighting tools for the assessment of quality assessment of the results, such as the production and evaluation of certified reference materials (CRMs) and the availability of specific proficiency testing (PT) programmes. Because the number of studies dedicated to the subject of this review has increased considerably over recent years, the sources consulted and cited here are limited to those from 2010 to the end of 2015.

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“…We used eluent 1-1 in the work previously reported. [35][36][37][38] The chromatogram of arsenic species obtained from the C18 column and eluent 1-1 is shown in Fig. 1.…”

Section: Influence Of the Sample Matrix On Analysismentioning

confidence: 99%

“…[35][36][37][38] Thus, these four species are the main analytes to be considered in the analysis of rice flour. As(III) and As(V) are often considered together as total i-As.…”

Section: Introductionmentioning

confidence: 99%

Reversed Phase Column HPLC-ICP-MS Conditions for Arsenic Speciation Analysis of Rice Flour

Narukawa¹,

Matsumoto

Nishimura

et al. 2015

ANAL. SCI.

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New measurement conditions for arsenic speciation analysis of rice flour were developed using HPLC-ICP-MS equipped with a reversed phase ODS column. Eight arsenic species, namely, arsenite [As(III)], arsenate [As(V)], monomethylarsonic acid (MMAA), dimethylarsinic acid (DMAA), trimethylarsine oxide (TMAO), tetramethylarsonium (TeMA), arsenobetaine (AsB) and arsenocholine (AsC), were separated and determined under the proposed conditions. In particular, As(III) and MMAA and DMAA and AsB were completely separated using a newly proposed eluent containing ammonium dihydrogen phosphate. Importantly, the sensitivity changes, in particular those of As(V) and As(III) caused by coexisting elements and by complex matrix composition, which had been problematical in previously reported methods, were eliminated. The new eluent can be applied to C8, C18 and C30 ODS columns with the same effectiveness and with excellent repeatability. The proposed analytical method was successfully applied to extracts of rice flour certified reference materials.

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Heat-Assisted Aqueous Extraction of Rice Flour for Arsenic Speciation Analysis

Cited by 52 publications

References 10 publications

A fully validated method for the determination of arsenic species in rice and infant cereal products

A fully validated method for the determination of arsenic species in rice and infant cereal products

Inorganic Arsenic Determination in Food: A Review of Analytical Proposals and Quality Assessment Over the Last Six Years

Reversed Phase Column HPLC-ICP-MS Conditions for Arsenic Speciation Analysis of Rice Flour

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