Photochemical vapor generation of iodine for detection by ICP-MS

Grinberg, Patrícia; Sturgeon, Ralph E.

doi:10.1039/b814272f

Cited by 57 publications

(52 citation statements)

References 44 publications

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“…Figure 1 provides a schematic of the experimental system. Secondary PVG systems that were also examined for performance included a combined UV spray chamber 29 successfully used for PVG of iodine 23,24 and a 15 W germicidal lamp wound with 2 m of thin wall Teflon tubing, as earlier described for use with mercury vapor generation. 30 The latter was connected to the thin-film GLS.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…However, recent work with photochemical vapor generation (PVG) 16,18,22 highlights promising applications for this purpose. Although iodine was readily amenable to PVG, generating methyl iodide upon irradiation of a dilute solution of acetic acid to yield an analyte introduction efficiency of 94% (40-fold enhancement in sensitivity), 23,24 bromine proved intractable under all experimental conditions investigated.Recently, Qin et al reported on use of a high efficiency flowthrough UV reactor that has been demonstrated suitable for PVG of mercury, 25 and more recently for Sn, 26 as well as providing a relatively thin-film of sample for irradiation of highly UV-absorbing gasoline to enable efficient reduction of mercury in this matrix. 27 It has been postulated 22 that efficient PVG of bromine may be possible if the sample can be irradiated with intense, deep UV radiation (185 nm); this flow-through lamp provides such access and was used herein to evaluate the feasibility of PVG of bromine.…”

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Detection of Bromine by ICP-oa-ToF-MS Following Photochemical Vapor Generation

Sturgeon

2015

Anal. Chem.

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/npsi/ctrl?action=rtdoc&an=21275830&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21275830&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/10.1021/ac504747aAnalytical Chemistry, 87, 5, pp. 3072-3079, 2015-02-04 Detection of Bromine by ICP-oa-ToF-MS Following Photochemical Vapor Generation Ralph E. Sturgeon* National Research Council of Canada, Measurement Science and Standards, Ottawa, Ontario K1A 0R6, Canada ABSTRACT: A unique flow-through photochemical reactor is utilized for the generation of volatile methyl bromide from aqueous solutions of bromide and bromate ions in a medium of 2% acetic acid containing 3000 μg/mL NH 4 Cl. The volatile product is transported to a thin-film gas−liquid phase separator and directed to an inductively coupled plasma (ICP) tine-offlight mass spectrometer for detection and quantitation using either of the 79 Br or 81 Br isotopes. Utilizing a sample flow rate of 3.3 mL/min and a 13 s irradiation time, a detection limit of 0.14 ng/mL is achieved, yielding a 17-fold enhancement over conventional solution nebulization. The estimated generation efficiency of 95% provides for a significant increase in analyte transport efficiency to the ICP. Precision of replicate measurement is 2.5% (RSD) at 20 ng/mL. The methodology was validated by successful determination of bromine in reference materials, including IRMM (BCR-611) low level bromide in groundwater, NIST SRM 1568b Rice Flour, and SRM 1632 bituminous coal.O nly recently has bromine been identified as an essential trace element, important for the development of collagen in mammals. 1 Current major interest in this element arises from its widespread usage in industrial materials, including fire retardants, agricultural pesticides and pharmaceuticals. Treatment of groundwater by ozonolysis 2 to ensure potability raises concerns over production of bromate disinfection byproducts which...

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Section: ■ Experimental Sectionmentioning

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Detection of Bromine by ICP-oa-ToF-MS Following Photochemical Vapor Generation

Sturgeon

2015

Anal. Chem.

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“…A longer period of exposure time promotes a decrease in the absorbance signal and other reactions as a re-oxidation of Hg can occur. 34,35 Considering the three species of Hg investigated, there is a stronger similarity in absorbance signal at 3.2 min of irradiation time (sample flow rate of 8 mL min -1 ). Although the maximum pump speed generates a more intense analytical signal, a longer time is required for signal stabilization at the baseline after each instrumental measurement, leading to a higher consumption of cleaning reagent (10.0% (v/v) HCOOH).…”

Section: Effect Of Irradiation Time (Conventional Pvg-cv Aas)mentioning

confidence: 99%

Determination of Hg in Biological Samples and Ethanol Fuel by Photochemical Vapor Generation after Pre-Concentration in a Gold Trap

Oreste¹,

Oliveira²,

Ribeiro³

et al. 2017

J. Braz. Chem. Soc.

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In this work, the photochemical vapor generation (PVG) coupled with atomic absorption spectrometry and a pre-concentration step with an Au column was used for the determination of Hg in biological samples and ethanol fuel. PVG with pre-concentration showed an up to 250-fold higher sensitivity compared to the approach without pre-concentration. The accuracy of analysis of biological samples was evaluated using certified reference materials (fish tissues), while for ethanol fuel samples, recovery tests were employed (91%). Analytical curves were linear (R > 0.99) in the studied range of 2.5 to 10 μg L -1 for conventional PVG and 0.2 to 0.5 μg L -1 for PVG with the pre-concentration step. For the last, the limits of detection reached for biological samples and ethanol fuel were 0.02 and 0.01 μg L -1 , respectively. The systems presented are simple, sensitive and safe for the control of low Hg concentrations in different samples. However, only the system using pre-concentration with an Au column was capable of obtaining the reproduced signals of Hg in low concentrations of the order of 0.2 μg L -1 .

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“…Guo et al [41] first introduced PVG in 2003, and applications of this new sample introduction quickly expanded [42,43]. A wide range of elements can be photochemically derivatized to volatile species, such as Hg [44,45], Ni [46,47], Se [43], Co [48,49], Fe [50], and I [51,52]. A typical schematic of PVG system is shown in Figure 2.…”

Section: Photochemical Vapor Generation Systemsmentioning

confidence: 99%

Application of chemical vapor generation in ICP-MS: A review

2013

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Chemical vapor generation (CVG) is an important sample introduction technique, and is widely used for atomic spectrometry for its enhanced sensitivity and selectivity. In the past 30 years, inductively coupled plasma mass spectrometry (ICP-MS) has become a widely used and the most sensitive instrument for (ultra-)trace element determination and elemental speciation. A review of applications of this state-of-the-art coupling of CVG and ICP-MS is presented. Discussion is focused on its applications for both element determination and speciation, including hydride generation, cold vapor generation, photochemical vapor generation, alkylation, and electrochemical vapor generation. In addition, recent studies undertaken isotope dilution calibration in CVG-ICP-MS for achieving improved accuracy and precision are summarized, and the future perspectives are discussed. chemical vapor generation, inductively coupled plasma mass spectrometry, isotope dilution, trace element determination, speciationCitation:

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Photochemical vapor generation of iodine for detection by ICP-MS

Cited by 57 publications

References 44 publications

Detection of Bromine by ICP-oa-ToF-MS Following Photochemical Vapor Generation

Detection of Bromine by ICP-oa-ToF-MS Following Photochemical Vapor Generation

Determination of Hg in Biological Samples and Ethanol Fuel by Photochemical Vapor Generation after Pre-Concentration in a Gold Trap

Application of chemical vapor generation in ICP-MS: A review

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