Silica modified with zirconium oxide for on-line determination of inorganic arsenic using a hydride generation-atomic absorption system

Macarovscha, Greice Trevisan; Bortoleto, Gisele Gonçalves; Cadore, Solange

doi:10.1016/j.talanta.2006.06.006

Cited by 25 publications

(8 citation statements)

References 19 publications

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“…Thus, the coated material can retain quantitatively Se(VI) in HCl/NaOH media, partly in B–R buffer, and nearly not at all in HAc‐NaAc buffer since the concentration of CH 3 COO − in HAc‐NaAc buffer is at least 20 times higher than that in the B–R buffer. In addition, the reason why Se(IV) cannot achieve quantitative absorption in B–R buffer may be due to the higher interference effect caused by phosphate because of the low‐solubility product ( K So [Zr 3 (PO) 4 ] = 1.0 × 10 −132 ) , leading to an intense competition between phosphate and Se(IV) by the adsorbent material.…”

Section: Resultsmentioning

confidence: 99%

Speciation of inorganic selenium in environmental water samples by inductively coupled plasma optical emission spectrometry after preconcentration by using a mesoporous zirconia coating on coal cinder

Wei

Guo

et al. 2014

J. Sep. Science

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A simple, novel, and selective flow-injection solid-phase extraction with inductively coupled plasma optical emission spectrometry method was developed for the speciation of inorganic selenium in environmental water samples. A mesoporous zirconia film was simply introduced to coat coal cinder by means of the sol-gel technique, and the adsorptive performance of the coated material for Se(IV)/Se(VI) was investigated in different media. Both Se(IV) and Se(VI) can be retained quantitatively by the material in HCl/NaOH (pH 1.0-9.0) media, while only Se(IV) was adsorbed quantitatively in sodium acetate buffer (pH 3.5-6.0). Thus, the assay of Se(VI) is based on subtracting Se(IV) from total selenium by controlling different adsorptive media without employing any redox procedure. Under the optimum conditions, the detection limit of Se(IV) is 9.0 ng/L with an enrichment factor of 100, and the relative standard deviation is 3.6% (n = 9, C = 5.0 ng/mL). The developed method was successfully applied to the speciation of inorganic selenium in environmental water samples with satisfactory results. In order to further verify the accuracy of the developed method, it was applied to analysis of total selenium in GSBZ 50031-94 certified reference environmental water, and the determined values coincided with the certified values very well.

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Section: Resultsmentioning

confidence: 99%

Speciation of inorganic selenium in environmental water samples by inductively coupled plasma optical emission spectrometry after preconcentration by using a mesoporous zirconia coating on coal cinder

Wei

Guo

et al. 2014

J. Sep. Science

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“…This competitive effect of chelating with coextracted metal ions can manipulate the complex As-DDTC and decrease the extraction recovery. Various studies (31)(32)(33)(34)(35)(36)(37)(38) have investigated the effect of interfering ions in conjunction with the microextraction method. To establish the effect of coexisting ions, a model solution of As at different interfering ions to analyte ratio was studied by applying the proposed PI-IL-DLLME method.…”

Section: Effect Of Interfering Ionsmentioning

confidence: 99%

Determination of Total Arsenic in Water and Food Samples by Pressure-induced Ionic Liquid-based Dispersive Liquid-Liquid Microextraction Method Prior to Analysis by Hydride Generation Atomic Absorption Spectrometry

Ali¹,

Tüzen²

2017

At.Spectrosc.

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“…However, an ammonia solution diluted with deionized water was used to elute PAA, because PAA is more hydrophilic than DPAA. Hydrochloric acid 25,29,30 and a sodium hydroxide solution 25,26 have until now been used to elute iAs from Zr adsorbents. However, if a sodium hydroxide solution was used, it would be released during the GFAAS drying step, and interfere with the atomization of the iAs.…”

Section: Effects Of the Chemical Species In The Eluent And Its Concenmentioning

confidence: 99%

Determination of Diphenylarsinic Acid, Phenylarsonic Acid and Inorganic Arsenic in Drinking Water by Graphite-furnace Atomic-absorption Spectrometry after Simultaneous Separation and Preconcentration with Solid-phase Extraction Disks

et al. 2013

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A simple method of graphite-furnace atomic-absorption spectrometry (GFAAS) after solid-phase extraction (SPE) was developed for the determination of diphenylarsinic acid (DPAA), phenylarsonic acid (PAA), and inorganic arsenic (iAs) in drinking water. This method involves the simultaneous collection of DPAA, PAA, and iAs using three stacked SPE disks, i.e., an Empore SDB-XD disk (the upper layer), an activated carbon disk (the middle layer), and a Cation-SR disk loaded with Zr and Ca (ZrCa-CED; the lower layer). A 200-mL aqueous sample was adjusted to pH 3 with nitric acid and passed through the SPE disks at a flow rate of 15 mL min -1 , to concentrate DPAA on the SDB-XD disk, PAA on the activated carbon disk, and iAs on the ZrCa-CED. The As compounds were eluted from the disks with 10 mL of ethanol containing 0.5 mol L -1 ammonia solution for DPAA, 20 mL of 1 mol L -1 ammonia solution for PAA, and 20 mL of 6 mol L -1 hydrochloric acid for iAs. The eluates of DPAA, PAA, and iAs were diluted to 20, 25, and 25 mL, respectively, with deionized water, and then analyzed by GFAAS. The detection limits of As (three-times the standard deviation (n = 3) of the blank values) were 0.13 and 0.16 μg L -1 at enrichment factors of 10 and 8, respectively, using a 200-mL water sample. Spike tests with 2 μg (10 μg L -1 ) of DPAA, PAA, and iAs in 200 mL of tap water and bottled drinking water showed good recoveries (96.1 -103.8%).

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Silica modified with zirconium oxide for on-line determination of inorganic arsenic using a hydride generation-atomic absorption system

Cited by 25 publications

References 19 publications

Speciation of inorganic selenium in environmental water samples by inductively coupled plasma optical emission spectrometry after preconcentration by using a mesoporous zirconia coating on coal cinder

Speciation of inorganic selenium in environmental water samples by inductively coupled plasma optical emission spectrometry after preconcentration by using a mesoporous zirconia coating on coal cinder

Determination of Total Arsenic in Water and Food Samples by Pressure-induced Ionic Liquid-based Dispersive Liquid-Liquid Microextraction Method Prior to Analysis by Hydride Generation Atomic Absorption Spectrometry

Determination of Diphenylarsinic Acid, Phenylarsonic Acid and Inorganic Arsenic in Drinking Water by Graphite-furnace Atomic-absorption Spectrometry after Simultaneous Separation and Preconcentration with Solid-phase Extraction Disks

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