Vapor generation – atomic spectrometric techniques. Expanding frontiers through specific-species preconcentration. A review

Gil, Raúl A.; Pacheco, Pablo H.; Cerutti, Soledad; Martínez, Luis D.

doi:10.1016/j.aca.2014.12.040

Cited by 21 publications

(9 citation statements)

References 114 publications

(146 reference statements)

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“…Furthermore, it has been reported that use of reaction/collision cells may further enhance this sensitivity gap between As(III) and As(V) [9]. Chemical hydride generation (HG) has been widely used with ICPMS to enhance detection power and accuracy for the determination of As [12,13], principally due to efficient matrix isolation and enhanced introduction/ionization efficiency. However, because of the species-dependent efficiencies of reduction of the different forms of arsenic by reaction with NaBH 4 /KBH 4 , pre-conversion all As species to a single form is required [14e17].…”

Section: CLmentioning

confidence: 99%

Multivariate optimization of photochemical vapor generation for direct determination of arsenic in seawater by inductively coupled plasma mass spectrometry

Gao

Sturgeon

Mester

et al. 2015

Analytica Chimica Acta

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/npsi/ctrl?action=rtdoc&an=21277071&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21277071&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1016/j.aca.2015.10.020Analytica Chimica Acta, 2015-10 Multivariate optimization of photochemical vapor generation for direct determination of arsenic in seawater by inductively coupled plasma mass spectrometry Photochemical vapor generation (PVG) sample introduction coupled to inductively coupled plasma mass spectrometry (ICPMS) is described for the determination of As in seawater. A PlacketteBurman design (PBD) and central composite design (CCD) were employed to evaluate the significance of experimental variables relevant to the optimization of PVG-ICPMS detection. The impact of the saline matrix on the suppression of analyte signal was eliminated by use of a mixture of 20% (v/v) formic and 20% acetic acid (v/v) as the photochemical reductants. Optimized conditions yielded equivalent PVG generation efficiencies for As(III), As(V), monomethylarsonic acids (MMAs) and dimethylarsinic acids (DMAs), permitting direct and rapid determination of total arsenic in seawater without any other sample pretreatment. Quantitation was accomplished using one point gravimetric standard addition along with a spike of 82 Se internal standard to compensate for signal drift and fluctuation during analysis. The resulting method detection limit of 3 pg g À1 (3s) provided a 15-fold improvement over that obtained using direct solution nebulization, and is comparable to that for conventional chemical hydride generation (HG)-ICPMS. Accuracy was demonstrated by analysis of two Certified Reference Materials (NASS-6 and CASS-5 seawater) with satisfying results characterized by precisions of 3.5% and 3.2% RSD for CASS-5 and NASS-6, respectively. Crown

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Section: CLmentioning

confidence: 99%

Multivariate optimization of photochemical vapor generation for direct determination of arsenic in seawater by inductively coupled plasma mass spectrometry

Gao

Sturgeon

Mester

et al. 2015

Analytica Chimica Acta

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“…Therefore, it is preferred that gaseous species of analytes are introduced into the microplasma, which conveniently provides separation of analyte from complex sample matrix with high transportation efficiency and minimal moisture. The most frequently used technique is chemical vapor generation (CVG), , including cold vapor generation (CV), hydride generation (HG), , and photochemical vapor generation (Photo-CVG). , Volatile species separated from sample matrix could be produced through the vapor generation process, although concomitants could sometimes also be yielded, such as hydrogen in the HG process. However, recent works have demonstrated that hydrogen has almost no significant effect on element determination and could even compromise spectral background …”

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confidence: 99%

Point Discharge Microplasma Optical Emission Spectrometer: Hollow Electrode for Efficient Volatile Hydride/Mercury Sample Introduction and 3D-Printing for Compact Instrumentation

et al. 2019

Anal. Chem.

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A miniaturized optical emission spectrometer was constructed with improved point discharge microplasma as an excitation source to enhance sample introduction efficiency and excitation efficiency. By using a hollow electrode as one of the discharge electrodes, analytecontaining chemical vapor yielded via hydride generation was transported and confined into the hollow electrode and subsequently guided into the microplasma with high sample introduction efficiency. Moreover, gaseous analyte species were directly diffused from inside the electrode into the center of the microplasma, instead of traditional external diffusion into the microplasma, resulting in sufficient participation in interactions and excitation in the plasma; thus, high excitation efficiency and stability can be achieved. A 3D-printing technique was used to fabricate some components for compact integration of this spectrometer. Physical characteristics of the microplasma, 3D-printing, and experimental parameters were all investigated to better understand the excitation capability and obtain optimal analytical performance. Under optimized conditions, As, Bi, Ge, Hg, Pb, Sb, Se, and Sn were successfully detected, with detection limits of 2.5, 0.44, 1.6, 0.10, 2.8, 1.5, 31, and 0.24 μg L −1 , respectively, and relative standard deviations all less than 4%. It was applied to the analysis of Certified Reference Materials (water, soil, and biological samples) and real water samples with satisfactory results. Because of its advantages of compactness, robustness, easy fabrication, and cost-effectiveness, it has a great prospect as a portable spectrometer for field analytical chemistry.

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“…Previous studies have shown that solid phase extraction (SPE) had higher selectivity and good reproducibility compared with liquid–liquid extraction. 8 Various materials 9,10 have been used as adsorbents for mercury species, Cd( ii ), Zn( ii ), Ni( ii ) and many other metal species, including thiol-functionalized mesoporous silica (FMMS), 11,12 thiol-functionalized graphene oxide/Fe–Mn composite (SGO/Fe–Mn), 13 two-dimensional transition-metal dichalcogenides (TMDs), 14,15 ion-imprinted magnetic nanoparticles (IIMN) 16 and graphene/biochar composite (G/BC). 17 As a typical TMD, molybdenum disulfide (MoS 2 ) has been used in the preconditioning of environmental samples due its few-layered structure, high special surface area, abundant binding sites (sulfur atoms) and strong affinity towards Hg 0 and Hg 2+ .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of MoS₂ nanosheets for mercury speciation analysis by HPLC-UV-HG-AFS

et al. 2018

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Mercury species have aroused wide concern in the past several decades due to their high toxicity. However, it is still difficult to detect ultra-trace mercury species due to their biochemical transformation in complex samples. To establish a simpler and more sensitive method for pre-concentration and determination of trace mercury species, molybdenum disulfide (MoS 2 ) nanosheets with sulfur-rich characteristics and enlarged interlayer spacing were prepared by a hydrothermal method coupled with a sonication-assisted liquid exfoliation method and acted as solid-phase extraction adsorbent. The nano-MoS 2 had high adsorption capacity, fast adsorption rate and excellent selectivity towards mercury ions (Hg 2+ ), methyl mercury (MeHg + ) and ethyl mercury (EtHg + ) in a wide pH range and complex matrices. And it could be easily regenerated by 4 mol L À1 HCl and reused several times. After optimizing HPLC-UV-HG-AFS conditions, a great linearity (1.0-10.0 mg L À1 , R 2 ¼ 0.999 for Hg 2+ , MeHg + and EtHg + ), lower detection limits (0.017, 0.037 and 0.021 ng mL À1 for Hg 2+ , MeHg + and EtHg + , respectively), relative standard deviations (<5%) and addition recoveries of the samples within 82.75-113.38% were observed. In summary, trace inorganic and organic mercury species in environmental and biological samples could be selectively enriched by the prepared nano-MoS 2 and efficiently seperated and detected by HPLC-UV-HG-AFS. The present study will help provide a better strategy for environmental monitoring and health assessment of mercury pollutants.

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Vapor generation – atomic spectrometric techniques. Expanding frontiers through specific-species preconcentration. A review

Cited by 21 publications

References 114 publications

Multivariate optimization of photochemical vapor generation for direct determination of arsenic in seawater by inductively coupled plasma mass spectrometry

Multivariate optimization of photochemical vapor generation for direct determination of arsenic in seawater by inductively coupled plasma mass spectrometry

Point Discharge Microplasma Optical Emission Spectrometer: Hollow Electrode for Efficient Volatile Hydride/Mercury Sample Introduction and 3D-Printing for Compact Instrumentation

Synthesis of MoS₂ nanosheets for mercury speciation analysis by HPLC-UV-HG-AFS

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Vapor generation – atomic spectrometric techniques. Expanding frontiers through specific-species preconcentration. A review

Cited by 21 publications

References 114 publications

Multivariate optimization of photochemical vapor generation for direct determination of arsenic in seawater by inductively coupled plasma mass spectrometry

Multivariate optimization of photochemical vapor generation for direct determination of arsenic in seawater by inductively coupled plasma mass spectrometry

Point Discharge Microplasma Optical Emission Spectrometer: Hollow Electrode for Efficient Volatile Hydride/Mercury Sample Introduction and 3D-Printing for Compact Instrumentation

Synthesis of MoS2 nanosheets for mercury speciation analysis by HPLC-UV-HG-AFS

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Synthesis of MoS₂ nanosheets for mercury speciation analysis by HPLC-UV-HG-AFS