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

Narukawa, Tomohiro; Matsumoto, Eri; Nishimura, Takuya; Hioki, Akiharu

doi:10.2116/analsci.30.245

Cited by 34 publications

(20 citation statements)

References 22 publications

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“…Therefore, after evaluating the dependence of the extraction property of As(III) and As(IV) on the acidity, 0.015 mol L -1 HNO3 solution had been selected in this experiment. 18,19 The chromatograms of samples ID-1, ID-5 and ID-10 are shown in Fig. 3.…”

Section: Arsenic Species In Cigarette Samplesmentioning

confidence: 99%

Arsenic Speciation and Cadmium Determination in Tobacco Leaves, Ash and Smoke

2016

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The concentrations of arsenic (As) and cadmium (Cd) in the tobacco leaves, ash and smoke of 10 kinds of cigarettes collected from different countries worldwide were determined by ICP-MS after microwave-assisted digestion. Total As and Cd concentrations in the tobacco leaves ranged from 0.20 to 0.63 and 1.8 to 9.9 mg kg -1 , respectively. By the speciation analysis of As in tobacco leaves and ash by HPLC-ICP-MS following acid extraction, arsenite [As(III)] and arsenate [As(V)] were determined and trace amounts of monomethylarsonic acid (MMAA), dimethylarsinic acid (DMAA), trimethylarsine oxide (TMAO), tetramethylarsonium (TeMA) and some unidentified As species were also found. Arsenic speciation for smoke absorbed in an aqueous solution was carried out. The sum of the As species in tobacco leaves, ash and smoke was in good agreement with the result of total As determination in each sample, and the recoveries of speciation were 100 ± 10%. The distributions and the behaviors of As species were clarified.

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Section: Arsenic Species In Cigarette Samplesmentioning

confidence: 99%

Arsenic Speciation and Cadmium Determination in Tobacco Leaves, Ash and Smoke

2016

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“…The shoots and roots of the plants were collected, carefully washed with deionized water and dried. The methods for measuring the contents of copper and cadmium followed those mentioned in Narukawa et al’s paper [24]. Briefly, the dried samples were digested with 15.3 M HNO 3 in a microwave digestion system ETHOS One (Milestone Inc., Milan, Italy).…”

Section: Methodsmentioning

confidence: 99%

Expression of a Vacuole-Localized BURP-Domain Protein from Soybean (SALI3-2) Enhances Tolerance to Cadmium and Copper Stresses

Tang

Cao²,

Qiu³

et al. 2014

PLoS ONE

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The plant-specific BURP family proteins play diverse roles in plant development and stress responses, but the function mechanism of these proteins is still poorly understood. Proteins in this family are characterized by a highly conserved BURP domain with four conserved Cys-His repeats and two other Cys, indicating that these proteins potentially interacts with metal ions. In this paper, an immobilized metal affinity chromatography (IMAC) assay showed that the soybean BURP protein SALI3-2 could bind soft transition metal ions (Cd2+, Co2+, Ni2+, Zn2+ and Cu2+) but not hard metal ions (Ca2+ and Mg2+) in vitro. A subcellular localization analysis by confocal laser scanning microscopy revealed that the SALI3-2-GFP fusion protein was localized to the vacuoles. Physiological indexes assay showed that Sali3-2-transgenic Arabidopsis thaliana seedlings were more tolerant to Cu2+ or Cd2+ stresses than the wild type. An inductively coupled plasma optical emission spectrometry (ICP-OES) analysis illustrated that, compared to the wild type seedlings the Sali3-2-transgenic seedlings accumulated more cadmium or copper in the roots but less in the upper ground tissues when the seedlings were exposed to excessive CuCl2 or CdCl2 stress. Therefore, our findings suggest that the SALI3-2 protein may confer cadmium (Cd2+) and copper (Cu2+) tolerance to plants by helping plants to sequester Cd2+ or Cu2+ in the root and reduce the amount of heavy metals transported to the shoots.

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“…Accordingly, AsB is the most useful species to be used as an internal standard for accurate analysis of the analytes. 38,39 However, if the separation of AsB and DMAA is poor, the analytical precision for DMAA becomes low and some correction related to the behavior of the internal standard may be necessary. For the analysis of rice flour samples on the ODS column, conditions under which five species, namely, As(V), As(III), MMAA, DMAA and AsB, are completely separated are necessary.…”

Section: Composition Of the Eluentmentioning

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

Cited by 34 publications

References 22 publications

Arsenic Speciation and Cadmium Determination in Tobacco Leaves, Ash and Smoke

Arsenic Speciation and Cadmium Determination in Tobacco Leaves, Ash and Smoke

Expression of a Vacuole-Localized BURP-Domain Protein from Soybean (SALI3-2) Enhances Tolerance to Cadmium and Copper Stresses

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

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