Separation of seven arsenic compounds by high-performance liquid chromatography with on-line detection by hydrogen–argon flame atomic absorption spectrometry and inductively coupled plasma mass spectrometry

Hansen, Steen Honoré; Larsen, Erik Huusfeldt; Pritzl, Gunnar; Cornett, Claus

doi:10.1039/ja9920700629

Cited by 105 publications

(40 citation statements)

References 28 publications

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“…The predominant forms of As in soil and water are as inorganic arsenate (As(V)) and arsenite (As(III)) (4)(5)(6)(7). Under oxidizing and aerobic conditions, the As(V) species predominates and exists as oxyanions of arsenic acid (H2AsO4 -and HAsO4 2-) (8).…”

Section: Introductionmentioning

confidence: 99%

Arsenic(III) Oxidation and Arsenic(V) Adsorption Reactions on Synthetic Birnessite

Manning

Fendorf

Bostick

et al. 2002

Environ. Sci. Technol.

583

440

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., "Arsenic(III) Oxidation and Arsenic(V) Adsorption Reactions on Synthetic Birnessite" (2002). Publications from USDA-ARS / UNL Faculty. 503. http://digitalcommons.unl.edu/usdaarsfacpub/503 The oxidation of arsenite (As(III)) by manganese oxide is an important reaction in both the natural cycling of As and the development of remediation technology for lowering the concentration of dissolved As(III) in drinking water. This study used both a conventional stirred reaction apparatus and extended X-ray absorption fine structure (EXAFS) spectroscopy to investigate the reactions of As(III) and As(V) with synthetic birnessite (MnO 2 ). Stirred reactor experiments indicate that As(III) is oxidized by MnO 2 followed by the adsorption of the As(V) reaction product on the MnO 2 solid phase. The As(V)-Mn interatomic distance determined by EXAFS analysis for both As(III)-and As(V)-treated MnO 2 was 3.22 Å, giving evidence for the formation of As(V) adsorption complexes on MnO 2 crystallite surfaces. The most likely As(V)-MnO 2 complex is a bidentate binuclear corner sharing (bridged) complex occurring at MnO 2 crystallite edges and interlayer domains. In the As(III)-treated MnO 2 systems, reductive dissolution of the MnO 2 solid during the oxidation of As(III) caused an increase in the adsorption of As(V) when compared with As(V)-treated MnO 2 . This suggested that As(III) oxidation caused a surface alteration, creating fresh reaction sites for As(V) on MnO 2 surfaces. Arsenic(III) Oxidation and Arsenic(V) Adsorption Reactions on Synthetic Birnessite

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Section: Introductionmentioning

confidence: 99%

Arsenic(III) Oxidation and Arsenic(V) Adsorption Reactions on Synthetic Birnessite

Manning

Fendorf

Bostick

et al. 2002

Environ. Sci. Technol.

583

440

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“…Therefore, precise knowledge of the selenium and arsenic compounds present in a system is required for an accurate assessment of the environmental and biological impact of selenium and arsenic, which have resulted in an increasing need of analytical methods for their determination at microtrace or even ultra-trace levels. Although an excellent group of papers has been published 2,3,7,11,[17][18][19][20][21][22][23][24][25][26][27] describing sensitive techniques used for the indirect spectrophotometric determination of Se and As, spectrophotometry still represents an attractive technique for the determination of metal ions in aqueous media because of its simplicity, being inexpensive and more readily available. Therefore, the present investigation aims to present a sensitive, simple, and rapid procedure for the indirect spectrophotometric determination of Se(IV) and As(V) after reduction with KI in an HCl medium, extracting the equivalent iodine with HOL surfactant and measuring the I2-HOL system at 435 nm.…”

mentioning

confidence: 99%

Indirect Spectrophotometric Determination of Small Amounts of Selenium(IV) and Arsenic(V) by Simple Extraction Using Flotation Columns

Mostafa

Ghazy

2001

ANAL. SCI.

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“…The most widely used analytical methods for element speciation are hyphenated techniques, favoured for both the efficient separation and elemental-specific detection 6 . Most suitable method currently used for arsenic speciation are based on the combination of HPLC with very sensitive and element-specific detection methods such as high-performance liquid chromatography with a flame atomic absorption spectrophotometer (HPLC/AAS) 7 , high performance liquid chromatography with atomic fluorescence spectroscopy (HPLC/AFS) 8 , or high performance liquid chromatography with inductively coupled plasma mass spectrometry (HPLC/ICP-MS) 9 . To improve sensitivity and eliminate matrix effects, hydride generation (HG) technique has been employed as a convenient link with the chromatographic separation 10 .…”

Section: Introductionmentioning

confidence: 99%

Determination of inorganic arsenic species by hydride generation atomic absorption spectrophotometry and cathodic stripping voltammetry

Chooto¹,

Wararattananurak²,

Kangkamano³

et al. 2015

ScienceAsia

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Flow injection-hydride generation-atomic absorption spectrophotometry (FI-HG-AAS) and square wave cathodic stripping voltammetry (SWCSV) were compared to detect inorganic arsenic species in lemongrass and turmeric. Two species, arsenite (As III ) and arsenate (As V ), were considered as they are known to occur in most terrestrial plants. As III and total water-soluble inorganic arsenic (TAs inorg ) were determined under different conditions.As III was selectively determined by using a soft generation condition, i.e., low HCl concentration, whereas TAs inorg was determined after pre-reduction of As V to As III with a KI/ascorbic acid mixture. The As V content was estimated as the difference between both measurements. Under optimal conditions, the limits of detection (LOD) by FI-HG-AAS were 0.02 and 0.03 µg/l for As III and TAs inorg , respectively. Relative standard deviations (n = 9) of less than 4% were obtained for both inorganic arsenic species. The accuracy was also verified by analysing spiked samples and certified reference material: CTA-VTL-2 (Virginia Tobacco leaves). The recoveries of both species were found to be between 90 and 115%. The determination of inorganic arsenic species by SWCSV in the samples is based on the formation of a copper-arsenic intermetallic compound at the hanging mercury drop electrode (HDME) during the preconcentration step. Only As III was deposited on the Hg electrode when Cu was present in the HCl medium. TAs inorg can be determined by reducing As V to As III with sodium thiosulphate. As V is quantified as the difference. At optimum conditions, the LOD for As III and As V were 0.5 and 0.4 µg/l, respectively. Relative standard deviations (n = 10) of less than 5% were obtained and the method was validated by analysing the spiked samples and certified reference material. FI-HG-AAS showed better LOD than SWCSV for both inorganic arsenic species. There was, however, a strong agreement between TAs values obtained by using FI-HG-AAS and SWCSV technique in lemongrass, turmeric, and the certified reference material (CTA-VTL-2). As V was the main inorganic arsenic species found in lemongrass and turmeric. The results confirm that the As content of both samples do not exceed the food safety limits for Thailand and several countries.

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Separation of seven arsenic compounds by high-performance liquid chromatography with on-line detection by hydrogen–argon flame atomic absorption spectrometry and inductively coupled plasma mass spectrometry

Cited by 105 publications

References 28 publications

Arsenic(III) Oxidation and Arsenic(V) Adsorption Reactions on Synthetic Birnessite

Arsenic(III) Oxidation and Arsenic(V) Adsorption Reactions on Synthetic Birnessite

Indirect Spectrophotometric Determination of Small Amounts of Selenium(IV) and Arsenic(V) by Simple Extraction Using Flotation Columns

Determination of inorganic arsenic species by hydride generation atomic absorption spectrophotometry and cathodic stripping voltammetry

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