Measurement of Arsenic Species in Infant Rice Cereals by Liquid Chromatography Inductively Coupled Plasma Mass Spectrometry

Brockman, John; Brown, John W. N.

doi:10.4236/ajac.2012.310091

Cited by 14 publications

(8 citation statements)

References 16 publications

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“…The use of H 2 O 2 (3%, v/v) facilitated quantitative oxidation of As(III) to As(V) for stronger retention on the anion SPE cartridge, which is in agreement with previous studies (16,24). Studies have also reported the disadvantages of using carbonated buffers as eluent (13). However, irrespective of these problems, the current method could achieve good repeatability and reproducibility ( Table 2).…”

Section: Methodssupporting

confidence: 89%

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Determination and Uncertainty Analysis of Inorganic Arsenic in Husked Rice by Solid Phase Extraction and Atomic Absorption Spectrometry with Hydride Generation

Saxena¹,

Karipalli²,

Krishnan³

et al. 2017

Journal of AOAC INTERNATIONAL

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This study enables the selective determination of inorganic arsenic (iAs) with a low detection limit using an economical instrument [atomic absorption spectrometer with hydride generation (HG)] to meet the regulatory requirements as per European Commission (EC) and Codex guidelines. Dry rice samples (0.5 g) were diluted using 0.1 M HNO3-3% H2O2 and heated in a water bath (90 ± 2°C) for 60 min. Through this process, all the iAs is solubilized and oxidized to arsenate [As(V)]. The centrifuged extract was loaded onto a preconditioned and equilibrated strong anion-exchange SPE column (silica-based Strata SAX 500 mg/6 mL), followed by selective and sequential elution of As(V), enabling the selective quantification of iAs using atomic absorption spectrometry with HG. In-house validation showed a mean recovery of 94% and an LOQ of 0.025 mg/kg. The repeatability (HorRatr) and reproducibility (HorRatR) values were <2, meeting the performance criteria mandated by the EC. The combined standard measurement uncertainty by this method was less than the maximum standard measurement uncertainty; thus, the method can be considered for official control purposes. The method was applied for the determination of iAs in husked rice samples and has potential applications in other food commodities.

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Section: Methodssupporting

confidence: 89%

“…Quantification of iAs is difficult, and efficient methods have only recently become available. The most commonly applied analytical methods for arsenic speciation are based on HPLC with inductively coupled plasma MS (13)(14)(15). However, chemical separation of arsenic species with subsequent determination by AAS-HG is easier and more cost effective (16,17).…”

mentioning

confidence: 99%

Determination and Uncertainty Analysis of Inorganic Arsenic in Husked Rice by Solid Phase Extraction and Atomic Absorption Spectrometry with Hydride Generation

Saxena¹,

Karipalli²,

Krishnan³

et al. 2017

Journal of AOAC INTERNATIONAL

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“…Brockman and Brown IV [47] extracted arsenic species from infant rice cereals through a hot water extraction procedure. Deionized water was added to each tube and the samples were maintained at 98 ∘ C (using a hot block) for 3 h. After cooling to room temperature the samples were centrifuged for 1 h in a centrifuge filtration system.…”

Section: Analytical Methodologymentioning

confidence: 99%

“…In this context, conventional extraction, also known as heating by hot plate, is one of the traditional methods most widely used for sample treatment. Based on this sample preparation strategy, several approaches have been used for arsenic extraction from acidic samples [44,47,50]. The concentrated acids are the most used extractant.…”

Section: Analytical Methodologymentioning

confidence: 99%

Analytical Strategies for the Determination of Arsenic in Rice

Costa¹,

Coelho²,

Araújo³

et al. 2016

Journal of Chemistry

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Arsenic is an element of concern given its toxicological significance, even at low concentrations. Food is a potential route of exposure to inorganic arsenic and in this regard arsenic in rice is associated with soil contamination, fertilizer application, and the use of arsenic-containing irrigation water. Therefore, there is a need to investigate the regional rice crops with a view to future discussions on the need for possible regulatory measures. Several studies have reported high concentrations of arsenic in rice grown in soils irrigated with contaminated water; however, procedures used, including sample pretreatment and preconcentration steps, have to be followed to ensure sensitivity, accuracy, and reproducibility. Arsenic is a difficult element to measure in complex matrices, such as foods, because the matrix must be destroyed at an elevated temperature without the loss of the analyte or contamination. This review summarizes the major methods for the determination of arsenic in rice samples. The main purpose of this review is to provide an update on the recent literature concerning the strategies for the determination of arsenic and to critically discuss their advantages and weaknesses. These difficulties are described along with recent developments aimed at overcoming these potential issues.

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“…Llorente-Mirandes et al 39,40 perform a fully validated method, based on the determination of arsenic species and applied it to a large number and variety of samples of cereal based food products and infant cereals. Brockman and Brown IV 196 propose an initial extraction with water at 98 C for 3 h and later addition of hydrogen peroxide to the aqueous filtrate obtained. The resulting arsenate, MA, and DMA from infant rice cereals are analyzed by this coupled technique.…”

Section: Coupled Techniques That Use Hplc As the Separation Techniquementioning

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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Measurement of Arsenic Species in Infant Rice Cereals by Liquid Chromatography Inductively Coupled Plasma Mass Spectrometry

Cited by 14 publications

References 16 publications

Determination and Uncertainty Analysis of Inorganic Arsenic in Husked Rice by Solid Phase Extraction and Atomic Absorption Spectrometry with Hydride Generation

Determination and Uncertainty Analysis of Inorganic Arsenic in Husked Rice by Solid Phase Extraction and Atomic Absorption Spectrometry with Hydride Generation

Analytical Strategies for the Determination of Arsenic in Rice

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

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