Extraction and speciation of arsenic in plants grown on arsenic contaminated soils

Mir, Kalam A.; Rutter, Allison; Koch, Iris; Smith, Paula G.; Reimer, Ken J.; Poland, John S.

doi:10.1016/j.talanta.2007.01.068

Cited by 87 publications

(61 citation statements)

References 37 publications

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“…This is supported by the findings of Mir et al (27) who reported that the As species in plant residual, after a methanol and HCl extraction, were substantially different from those extracted. Even thought Mir et al (27) did not identify the As species in the plant residuals, it is likely that they were in the form of oxidized inorganic species since their absorption spectra were shifted to energies higher than that of arsenate. We plan to further investigate both these aspects using "bulk" XANES of brown rice and paired samples of the same rice after polishing.…”

Section: Resultssupporting

confidence: 84%

Speciation and Localization of Arsenic in White and Brown Rice Grains

Meharg

Lombi

Williams

et al. 2008

Environ. Sci. Technol.

328

212

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Synchrotron-based X-ray fluorescence (S-XRF) was utilized to locate arsenic (As) in polished (white) and unpolished (brown) rice grains from the United States, China, and Bangladesh. In white rice As was generally dispersed throughout the grain, the bulk of which constitutes the endosperm. In brown rice As was found to be preferentially localized at the surface, in the region corresponding to the pericarp and aleurone layer. Copper, iron, manganese, and zinc localization followed that of arsenic in brown rice, while the location for cadmium and nickel was distinctly different, showing relatively even distribution throughout the endosperm. The localization of As in the outer grain of brown rice was confirmed by laser ablation ICP-MS. Arsenic speciation of all grains using spatially resolved X-ray absorption near edge structure (µ-XANES) and bulk extraction followed by anion exchange HPLC-ICP-MS revealed the presence of mainly inorganic As and dimethylarsinic acid (DMA). However, the two techniques indicated different proportions of inorganic:organic As species. A wider survey of whole grain speciation of white (n ) 39) and brown (n ) 45) rice samples from numerous sources (field collected, supermarket survey, and pot trials) showed that brown rice had a higher proportion of inorganic arsenic present than white rice. Furthermore, the percentage of DMA present in the grain increased along with total grain arsenic.

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Section: Resultssupporting

confidence: 84%

Speciation and Localization of Arsenic in White and Brown Rice Grains

Meharg

Lombi

Williams

et al. 2008

Environ. Sci. Technol.

328

212

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“…7 The development of simple and reliable methods for arsenic determination in plants and food are necessary to have an accurate measure of the contamination. 8 Some analytical techniques have been described for arsenic determination in food and plants sample. Mleczek et al 9 evaluated the bioaccumulation of arsenic in mushroom and the influence in the development of the species.…”

Section: Introductionmentioning

confidence: 99%

“…A simple and efficient method for arsenic extraction in plants was developed by Mir et al, 8 employing a sequential extraction method with water/methanol 1:1 (v v ) followed by 0.1 M HCl and diluted HCl. Arsenic was quantified by inductively coupled plasma optical emission spectrometry (ICP OES), HPLC-HG-AAS, HPLC-ICP-MS and X-ray absorption near edge spectroscopy (XANES) to evaluate the stability of As III and As V during the extraction process.…”

Section: Introductionmentioning

confidence: 99%

“…8,[13][14][15][16][17] Hydride generation coupled with flame atomic absorption spectroscopy (HG-FAAS) is a technique capable of providing good limits of detection (LOD) for arsenic 18 that are below the threshold of 10 µg L -1 established by the Brazilian regulation for water used for irrigation, human consumption and recreation. 19 Ultrasonic assisted extraction (UAE) is often used as a suitable extraction method of arsenic in solids samples.…”

Section: Introductionmentioning

confidence: 99%

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Comparison between Ultrasound Assisted Extraction and Microwave Digestion in the Determination of Arsenic in Edible Grains

Ribeiro¹,

Vieira²,

Lobo³

et al. 2017

J. Braz. Chem. Soc.

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A comparative evaluation of arsenic extraction from grains using ultrasound assisted extraction (UAE) and microwave digestion (MW) was developed. The arsenic determination was carried out using hydride generation coupled to flame atomic absorption spectroscopy (HG-FAAS). The optimal extraction condition indicated for corn was 20% v v -1 of HCl, temperature of 67 °C and sonication time of 30 min. For bean, the optical condition was HNO 3 in a 10% v v -1 , temperature of 25 °C and sonication time of 10 min and for soybean it was 30% v v -1 HCl, temperature of 60 °C and time of 10 min. Recovery studies close to 100% in the extraction of spiked samples was achieved. The results obtained were compared with two common extraction methods for arsenic using microwave digestion and the developed methods showed a significant increase in the arsenic recovery from the samples. In the real samples it was found an arsenic concentration of 0.3 µg g -1 . The developed methods proved to be efficient at extracting the arsenic present in the studied grains, being appropriate to evaluate the risk to human consumption.

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“…Existem muitas técnicas de determinação do arsênio. As mais importantes citadas na literatura são as que usam a técnica da geração de hidreto (arsina) associadas à espectrofotometria de absorção atômica (HGAAS) (Mir et al, 2007) e associadas a espectrofotometria de absorção molecular como a do SDDC (Arbab-Zavar & Hashemi, 2000) também conhecida como técnica de Vasak & Sedivec (1952) metodologia recomendada pela APHA, AWWA e WPCF (1991). O SDDC é dissolvido em piridina e usado como solução absorvedora da arsina, gerada através da reação do zinco em meio clorídrico.…”

Section: Introductionunclassified

Determinação espectrofotométrica do arsênio em solo da cidade de Santana-AP usando o método do dietilditiocarbamato de prata (SDDC) modificado

Pereira

Oliveira

et al. 2009

Acta Amaz.

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RESUMOVárias toneladas de rejeito de manganês contendo arsênio, gerado por uma empresa de mineração, foram utilizadas como aterro de ruas da cidade de Santana-AP. A possibilidade de exposição das pessoas residentes nessas localidades levou ao estudo de quantificação de arsênio total nos solos. Após a digestão, os teores de arsênio foram quantificados por espectrofotometria de absorção molecular usando um sistema automático de geração de hidretos (HG-MAS), diciclohexilamina/CHCl 3 como solvente do dietilditiocarbamato de prata (SDDC) e KBH 4 como redutor. O método apresentou bons resultados com sensibilidade (ε) de 1,10 10 4 L.mol -1 .cm -1 , estabilidade de 2,96% e outras vantagens em relação ao método oficial. O método foi aplicado em amostras de referência de solo com recuperação de 98,82 % (N=10). As análises de solos mostraram que do total de amostras analisadas 94,74 % apresentaram concentração de arsênio acima do valor editado pela CETESB para solo residencial (50 mg.kg -1 ) com valor médio de 682,96 mg.kg -1 , variando de 48,08 mg.kg -1 a 1.713,00 mg.kg -1 que comprova a contaminação do solo pelo arsênio. PALAVRAS-CHAVE: Rejeito, contaminação, SDDCArsenic spectrophotometric determination in soil of the Santana-AP city using the silver diethyldithiocarbamate (SDDC) modified method ABSTRACT Several tons of manganese residues containing arsenic, generated by a mining company, were used as streets landfill in SantanaAp city. The possibility of exposure of people living in these villages has led to the study of quantification of total arsenic in the soil. After digestion, the levels of arsenic were quantified by molecular absorption spectrophotometry using a hydrides generation automatic system (HG-MAS), dicyclohexilamine/CHCl 3 as silver diethyldithiocarbamate (SDDC) solvent and KBH 4 as reducer. The method presented good results with sensitivity (ε) of 1.10 10 4 l.mol -1 .cm -1 , stability of 2.96 % and other advantages in relation to the official method. The method was applied to the soil standard samples with recoveries of the 98.82 % (n=10). The soil analysis showed that 94.74 % samples showed arsenic concentrations above the value published by CETESB for residential land (50 mg.kg -1 ) with the average value of 682.96 mg.kg -1 , ranging of 48.08 mg.kg -1 at 1,713.00 mg.kg -1 shows that the soil arsenic contamination.

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Extraction and speciation of arsenic in plants grown on arsenic contaminated soils

Cited by 87 publications

References 37 publications

Speciation and Localization of Arsenic in White and Brown Rice Grains

Speciation and Localization of Arsenic in White and Brown Rice Grains

Comparison between Ultrasound Assisted Extraction and Microwave Digestion in the Determination of Arsenic in Edible Grains

Determinação espectrofotométrica do arsênio em solo da cidade de Santana-AP usando o método do dietilditiocarbamato de prata (SDDC) modificado

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