Versatile Thin-Film Reactor for Photochemical Vapor Generation

Abstract

Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Versatile thin-film reactor for photochemical vapor generation Zheng, Chengbin; Sturgeon, Ralph E.; Brophy, Christine; Hou, Xiandeng http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=16335085&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=16335085&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/ac100229kAnalytical Chemistry, 82, 7, pp. 3086-3093, 2010-03- ABSTRACTA novel system which significantly enhances copper hydride generation efficiency was used for the determination of trace copper by coupling a flow injection system to a graphite furnace for in-situ collection of the analyte and subsequent AAS detection. A single device integrated the functions of hydride generator and gas liquid separator.Solutions of the sample, acidified to 1 % formic acid, and tetrahydroborate reductant were merged to yield a thin film wetting a reaction surface from which product vapor was efficiently liberated and transported to the heated furnace. Optimum operating conditions provided for a generation / transport / collection efficiency of 8-12%. Interferences from common transition and noble metals were effectively eliminated. A limit of detection of 60 pg ml -1 was obtained based on processing a 5 mL sample volume with a precision of better than 4% (RSD) at 1 ng mL -1 . The methodology was successfully applied to the determination of Cu in several NRCC natural w ater and biological tissue Certified Reference Materials.3

Direct Determination of Trace Antimony in Natural Waters by Photochemical Vapor Generation ICPMS: Method Optimization and Comparison of Quantitation Strategies

“…24 Among them, acetic acid was found to be more efficient for the PVG of Sb. 32,33 During the preliminary experiments, efficient photochemical reduction of Sb occurs (steady-state signal obtained) if the concentration of acetic acid is in a range of 10−30% (v/v), as shown in Figure 2a. Only background signal was obtained when the PVG UV lamp was switched off, confirming sensitivity enhancement of Sb was indeed due to PVG.…”

Integrating photochemical vapor generation with photo-oxidation trapping for effective mercury removal from polluted water and its on-line monitoring

“…Our previous work [13] showed that the photochemical vapor generation efficiency of mercury is not only dependent on the concentration of LWM organic compounds but also determined by the UV irradiation time. Meanwhile, the optimal irradiation time for different elements varies: I, Co, and Hg can be easily reduced to their volatile species and then 5 s of UV irradiation time is more than enough.…”

“…Therefore, it is desired to develop a new CVG method to replace the conventional techniques. Recently, photochemical cold vapor generation (Photo-CVG) has been developed to eliminate the use of unstable or toxic reductants such as SnCl 2 and NaBH 4 [13][14][15][16][17]. Despite increasing interest in Photo-CVG over the past several years, this technique has been used for the determination of mercury but not for mercury removal.…”

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

“…This modified system has been successfully applied to the determination of iodine in sediments and biological materials. Recently, a versatile thin-film reactor in order to achieve better performance of PVG was developed by the same group [55]. The device utilized a vertical central quartz rod which was inside a concentric quartz tube served both as a generator and a gas liquid separator.…”