Does the determination of inorganic arsenic in rice depend on the method?

Calle, María Beatriz de la; Emteborg, Håkan; Linsinger, Thomas P. J.; Montoro, R.; Sloth, Jens Jørgen; Rubio, R.; Baxter, Malcolm; Feldmann, Jörg; Vermaercke, P.; Raber, Georg

doi:10.1016/j.trac.2010.11.015

Cited by 55 publications

(41 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although this parameter is important in the evaluation of the results of toxic substances in food control, it is rarely described in the literature [26]. Relative expanded uncertainty was estimated by a top-down method, adapted from [43].…”

Section: Expanded Uncertaintymentioning

confidence: 99%

“…Laboratory A participated as an expert laboratory in the IMEP-107: Total and iAs in rice [26,46]. Laboratory B participated in a PT of the Central Science Laboratory-Food Analysis Performance Assessment Scheme (CSL-FAPAS), in the determination of total and inorganic As in rice, with good results.…”

Section: External Quality Controlmentioning

confidence: 99%

“…There are currently no EU regulations regarding As levels in foods [26]. The Chinese standard for iAs in rice is probably the strictest in the world, with a standard limit of 150 μg As kg -1 iAs [51].…”

Section: Arsenic Speciationmentioning

confidence: 99%

See 2 more Smart Citations

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

View full text Add to dashboard Cite

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.

show abstract

Section: Expanded Uncertaintymentioning

confidence: 99%

Section: External Quality Controlmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

show abstract

“…Since the toxicity of As depends upon the chemical species, it is important to determine which chemical species are present in a foodstuff as well as the total concentration of the element. [18][19][20][21][22][23][24][25][26][27][28][29] Although a limited number of studies have investigated the changes in As species that occur in rice fields and their dependence on soil conditions, 13,14 there is a lack of information on the As species in rice flour.…”

Section: Introductionmentioning

confidence: 99%

Determination of Sixteen Elements and Arsenic Species in Brown, Polished and Milled Rice

et al. 2014

View full text Add to dashboard Cite

The concentrations of 16 elements in 10 rice flour samples and the distribution of the elements in the rice grains from which the flour were made were determined by ICP-MS and ICP-OES after microwave-assisted digestion of the samples. Arsenic speciation analysis was carried out by HPLC-ICP-MS following heat-assisted extraction of the sample. The concentrations of inorganic As (As(III) and As(V)), monomethylarsonic acid (MMAA) and dimethylarsinic acid (DMAA) and their distribution in the rice grains were determined. Portions of the brown rice were polished/milled to different degrees to yield milled off samples and polished rice samples. All samples were powdered and analyzed for 16 elements and for As species. The recoveries and mass balances for all elements in all samples showed good agreements with the starting materials. As(III), As(V), MMAA and DMAA were detected, and the sums of the concentrations of all species in the extract were 86 -105% of the total As concentration in each case.

show abstract

“…Toxicity of arsenic to humans has been known for centuries, (Eisler, 1988) however the interest on this topic is still very active worldwide and intense efforts are devoted to the detection of arsenic species and mitigation of their associated toxicity (Beauchamp et al, 2011;De la Calle et al, 2011;Jomova et al, 2011;Wan et al, 2011). Arsenic occurs naturally mainly in form of sulfide ores that, depending on the biogeochemical conditions can release toxic inorganic species in groundwater, such as arsenate (V) and arsenite (III).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical As(III) whole-cell based biochip sensor

Cortés‐Salazar

Beggah

Meer

et al. 2013

Biosensors and Bioelectronics

View full text Add to dashboard Cite

a b s t r a c tThe development of a whole-cell based sensor for arsenite detection coupling biological engineering and electrochemical techniques is presented. This strategy takes advantage of the natural Escherichia coli resistance mechanism against toxic arsenic species, such as arsenite, which consists of the selective intracellular recognition of arsenite and its pumping out from the cell. A whole-cell based biosensor can be produced by coupling the intracellular recognition of arsenite to the generation of an electrochemical signal. Hereto, E. coli was equipped with a genetic circuit in which synthesis of beta-galactosidase is under control of the arsenite-derepressable arsR-promoter. The E. coli reporter strain was filled in a microchip containing 16 independent electrochemical cells (i.e. two-electrode cell), which was then employed for analysis of tap and groundwater samples. The developed arsenic-sensitive electrochemical biochip is easy to use and outperforms state-of-the-art bacterial bioreporters assays specifically in its simplicity and response time, while keeping a very good limit of detection in tap water, i.e. 0.8 ppb. Additionally, a very good linear response in the ranges of concentration tested (0.94 ppb to 3.75 ppb, R 2 ¼0.9975 and 3.75 ppb to 30 ppb, R 2 ¼0.9991) was obtained, complying perfectly with the acceptable arsenic concentration limits defined by the World Health Organization for drinking water samples (i.e. 10 ppb). Therefore, the proposed assay provides a very good alternative for the portable quantification of As (III) in water as corroborated by the analysis of natural groundwater samples from Swiss mountains, which showed a very good agreement with the results obtained by atomic absorption spectroscopy

show abstract

Does the determination of inorganic arsenic in rice depend on the method?

Cited by 55 publications

References 13 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

Determination of Sixteen Elements and Arsenic Species in Brown, Polished and Milled Rice

Electrochemical As(III) whole-cell based biochip sensor

Contact Info

Product

Resources

About