Inorganic arsenic speciation in rice products using selective hydride generation and atomic absorption spectrometry (AAS)

Santos, Greice Magalhães dos; Pozebon, Dirce; Cerveira, Camila; Moraes, Diogo Pompéu de

doi:10.1016/j.microc.2017.03.025

Cited by 40 publications

(13 citation statements)

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“…This can be explained by the higher concentration of As in the bran that remains in the grain of brown rice. Santos et al (2017) found that iAs is in general the predominant As form in rice milk, following the same pattern observed for rice. The mean concentration of iAs (As(III + As(V)) found in the present study ranged from 10.19 to 19.47 μg L −1 , which is close to that found by Munera-Picazo et al, 2014, Meharg et al, 2008.…”

Section: Resultssupporting

confidence: 69%

“…Meharg et al (2008) determined DMA, MMA and iAs in rice milk produced in European Union countries whereas the main species found was iAs. Similar results were observed by Pedron et al (2016) for rice milk from Italy; Santos, Pozebon, Cerveira, and Moraes (2017) for rice milk powder from Brazil; and Munera-Picazo, Burló, and Carbonell-Barrachina (2014) for rice milk from Spain. These results demonstrate the importance of the As speciation and that the total concentration of the element does not bring the necessary information.…”

Section: Introductionsupporting

confidence: 84%

“…Munera-Picazo et al, 2014, Santos et al, 2017 employed liquid chromatography-atomic fluorescence spectrometry (LC-AFS) and hydride generation atomic absorption spectrometry (HG-AAS) for As speciation in rice milk, respectively. These techniques, despite the lower cost and enable the determination of iAs, they are not suitable for determination of DMA and MMA in rice milk due to the lack of sensitivity (in the case of LC-AFS) or inability to quantify them (in the case of HG-AAS).…”

Section: Introductionmentioning

confidence: 99%

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Arsenic speciation analysis in rice milk using LC-ICP-MS

et al. 2019

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Section: Resultssupporting

confidence: 69%

Section: Introductionsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Arsenic speciation analysis in rice milk using LC-ICP-MS

et al. 2019

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“…Recently, many analytical methods have been introduced for quantification of arsenic species in the rice sample such as gas chromatography tandem mass spectrometry after appropriate derivatization steps, and liquid chromatography in combination with atomic absorption/fluorescence spectrometry (HPLC-AAS/AFS) [7, 8], liquid chromatography in combination with atomic absorption spectrometry via hydride generator (HPLC-HG-AAS), liquid chromatography in combination with inductively coupled plasma quadrupole mass spectrometry (HPLC-ICP-QMS) [6, 9, 10], gas chromatography mass spectrometry, and gas chromatography atomic emission spectrometry have been also introduced for speciation analysis of arsenic compounds in ready-to-eat rice samples [11, 12]. Moreover, a nonchromatographic separation was also introduced for analysis of inorganic arsenic in rice samples [13]. Among these methods, HPLC-ICP-QMS is the most popular for speciation analysis of arsenic compounds in both environmental and biological samples because of its selectivity, sensitivity, and flexibility [14–16].…”

Section: Introductionmentioning

confidence: 99%

Speciation Analysis of Arsenic Compounds by High-Performance Liquid Chromatography in Combination with Inductively Coupled Plasma Dynamic Reaction Cell Quadrupole Mass Spectrometry: Application for Vietnamese Rice Samples

Nguyen

Vu-Thi

et al. 2019

Journal of Analytical Methods in Chemistry

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In this work, high-performance liquid chromatography in combination with inductively coupled plasma dynamic reaction cell quadrupole mass spectrometry was introduced and optimized for speciation analysis of five major arsenic species including arsenobetain (AsB), arsenite (As(III)), monomethylarsonic (MMA), dimethylarsenonic acid (DMA), and arsenate (As(V)) in rice samples. Five arsenic compounds were separated on a Hamilton PRP X100 strong anion-exchange column employed with the mobile phase that is compatible with mass spectrometry, containing ammonium carbonate, methanol, and disodium ethylenediaminetetraacetic acid. Arsenic compounds were detected online by inductively coupled plasma dynamic reaction cell quadrupole mass spectrometry utilizing oxygen as the reaction gas at a flow rate of 0.7 mL·min−1. Five selected arsenic species were baseline separated at the optimum experimental conditions. The excellent LOD and LOQ values of the developed method were achieved in the range of 0.5 to 2.9 μg·kg−1 and 1.7 to 9.6 μg·kg−1 for all species of arsenic, respectively. The ionization effect in plasma during chromatographic gradient elution was systematically investigated by using postcolumn injector. Arsenic compounds in rice samples were extracted by diluted nitric acid at elevated temperature. The extraction efficiency and the interconversion of target compounds during sample preparation were also assessed. The full validation of the developed method was performed by using certified reference material, BRC 211, from European Institute of Reference and Standard for speciation analysis. The recovery of all selected arsenic species was in the range of 70 to 135.5%. The validated method was also applied to analyze rice samples collected from some contaminated rice fields. The results showed that As(III), DMA, and As(V) were found in all rice samples. Average concentration (range) of inorganic arsenic and DMA in all rice samples were 130.3 (65.5–228.1) and 32 (8.2–133.01) μg·kg−1, respectively. However, total concentration of inorganic arsenic in most of investigated rice samples was below the maximum residual level according to US-FDA and European Union standards.

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“…In general, several element-specic and sensitive instrumental techniques [2][3][4][5][6][7][8][9][10][11] have been successfully utilized for direct analysis of total amount of As at trace levels. To obtain information about the toxicities, biochemical, bioavailability and environmental behavior of arsenite and arsenate species, it is necessary to develop sensitive and selective methodologies for the qualitative and quantitative analysis of these individual inorganic arsenic species.…”

Section: Introductionmentioning

confidence: 99%