Kinetics of atmospheric oxidation of nitrous acid by oxygen in aqueous medium

Mudgal, Punit K.; Bansal, Seema; Gupta, K. C.

doi:10.1016/j.atmosenv.2007.01.036

Cited by 21 publications

(14 citation statements)

References 14 publications

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“…An analoguer eaction to reaction (13) has previously been suggested to explain why the rate of the oxidation of NO x by dioxygen was observed to be severalo rders of magnitude faster just around 0 8Ci nw ater droplets. [35,36] The freeze-concentration effect leads the HNO 2 concentration to increase drastically in the remainingl iquid phase by af actor of 240-11 000. [37] The formed HNO 2 dimers are activated towards oxidation by O 2 :…”

Section: No 2 ðIlþ!n 2 O 4 ðIlþð 7þmentioning

confidence: 99%

Absorption and Oxidation of Nitrogen Oxide in Ionic Liquids

Kunov-Kruse

Thomassen

Riisager

et al. 2016

Chemistry A European J

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Abstract:A new strategy for capturing nitrogen oxide, NO from the gas phase is presented. Dilute NO gas is removed from the gas phase by ionic liquids at ambient conditions. The nitrate anion of the ionic liquid catalyzes the oxidation of NO to nitric acid (HNO3) by atmospheric oxygen in the presence of water. The nitric acid is absorbed in the ionic liquid up to approximately 1 mol HNO3 per mol of ionic liquid due to the formation of hydrogen bonds. The nitric acid can be desorbed by heating, regenerating the ionic liquid with excellent reproducibility. Here, time resolved in-situ spectroscopic investigations of the reaction and products are presented. The procedure reveals a new vision for removing the pollutant, NO, by absorption into a non-volatile liquid and converting it into a useful bulk chemical, HNO3.

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Section: No 2 ðIlþ!n 2 O 4 ðIlþð 7þmentioning

confidence: 99%

Absorption and Oxidation of Nitrogen Oxide in Ionic Liquids

Kunov-Kruse

Thomassen

Riisager

et al. 2016

Chemistry A European J

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“…An aqueous solution of isotopically-labeled nitrite and nitrate (isotopic internal standard) was prepared in dilute sodium hydroxide (pH = 10) from aqueous 15 General aspects of the preparation of these two standard solutions are discussed in section 3.1.…”

Section: Solutions Of Natural Primary Standard and Isotopic Internal mentioning

confidence: 99%

“…In this vein, the nitration of an aromatic compound was first proposed for the conversion of nitrate into nitro-arenes [13]. This approach requires a strongly acidic reaction medium which can cause the unwanted conversion of nitrite to nitrate [14][15]. A modern alternative to nitration is alkylation with pentafluorobenzyl bromide (F 5 BzBr).…”

Section: Introductionmentioning

confidence: 99%

High-precision quadruple isotope dilution method for simultaneous determination of nitrite and nitrate in seawater by GCMS after derivatization with triethyloxonium tetrafluoroborate

Meija

Mester

2014

Analytica Chimica Acta

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Access and use of this website and the material on it are subject to the Terms and Conditions set forth at High-precision quadruple isotope dilution method for simultaneous determination of nitrite and nitrate in seawater by GCMS after derivatization with triethyloxonium tetrafluoroborate Pagliano, E.; Meija, J.; Mester, Z.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=21272651&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21272651&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.2014.03.018Analytica Chimica Acta, 824, pp. 36-41, 2014 experimental design which generates results with low uncertainties and obviates the need for direct (separate) evaluation of the procedural blank. Nitrite and nitrate detection was achieved using a headspace GCMS procedure based on single-step aqueous derivatization with triethyloxonium tetrafluoroborate at room temperature. In this paper the sample preparation was revised and fundamental aspects of this chemistry are presented. The proposed method has detection limits in the low parts-per-billion for both analytes, is reliable, precise, and has been validated using a seawater certified reference material (MOOS-2). Simplicity of the experimental design, low detection limits, and the use of quadruple isotope dilution makes the present method superior to the state-of-the-art for determination of nitrite and nitrate, and an ideal candidate for reference measurements of these analytes in seawater.

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“…The nitration of aromatic compounds has been used to convert nitrate (3) . This approach, however, does not work for nitrite and requires the use of strong acid conditions which may be critical if any nitrite is present because of its possible conversion to nitrate (5)(6) . Another technique used with GC-MS entails alkylation with pentafluorobenzyl bromide (F 5 BzBr) (7) to convert nitrite and nitrate to F 5 Bz-NO 2 and F 5 Bz-ONO 2 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Negative Chemical Ionization GC/MS Determination of Nitrite and Nitrate in Seawater Using Exact Matching Double Spike Isotope Dilution and Derivatization with Triethyloxonium Tetrafluoroborate

et al. 2012

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Access and use of this website and the material on it are subject to the Terms and Conditions set forth at 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/ac2030128Analytical Chemistry, 84, 5, pp. 2592-2596, 2012-03-06 A BACBD EF D A ABSTRACTThe alkylation of nitrite and nitrate by triethyloxonium tetrafluoroborate allows determination of their ethyl esters by headspace GC-MS. In the present study, significant improvement in analytical performance are achieved by using negative chemical ionization (CI-). Detection limits are improved for at least an order of magnitude than those achieved using electron impact ionization (EI). The derivatization procedure has been optimized and alkaline conditions are adopted to minimize the conversion of nitrite to nitrate (determined to be 0.07% at 100 mg/L NO 2 -) and to avoid the exchange of oxygen between the analytes and the solvent (water).Quantitation entails the use of isotopically enriched standards (N 18 O 2 -and 15 NO 3 -), which also permits monitoring of potential conversion from nitrite to nitrate during the analysis (double spike isotope dilution).

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Kinetics of atmospheric oxidation of nitrous acid by oxygen in aqueous medium

Cited by 21 publications

References 14 publications

Absorption and Oxidation of Nitrogen Oxide in Ionic Liquids

Absorption and Oxidation of Nitrogen Oxide in Ionic Liquids

High-precision quadruple isotope dilution method for simultaneous determination of nitrite and nitrate in seawater by GCMS after derivatization with triethyloxonium tetrafluoroborate

Negative Chemical Ionization GC/MS Determination of Nitrite and Nitrate in Seawater Using Exact Matching Double Spike Isotope Dilution and Derivatization with Triethyloxonium Tetrafluoroborate

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