Colorimetric determination of atmospheric nitrogen dioxide using preconcentration on C-18 cartridge.

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2020-12-10T18:01:09Z
dc.date.accessioned2022-12-19T20:07:54Z
dc.date.available2020-12-10T18:01:09Z
dc.date.available2022-12-19T20:07:54Z
dc.date.created2020-12-10T18:01:09Z
dc.date.issued2002-05-01
dc.identifierQuimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 25, n. 3, p. 353-357, 2002.
dc.identifier0100-4042
dc.identifierhttp://hdl.handle.net/11449/195717
dc.identifierWOS:000175847000002
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5376355
dc.description.abstractCOLORIMETRIC DETERMINATION OF ATMOSPHERIC NITROGEN DIOXIDE USING PRECONCENTRATION ON C-18 CARTRIDGE, An alternative analytical method for nitrogen dioxide (NO,) in atmosphere was developed. The collection of NO, is performed by a Sep-Pack C-18 cartridge impregnated with 11 % (v/v) of triethanolaminc plus 3,6 % (v/v) of ethylene glycol plus 25 % (v/v) of acetone combined solution. When the impregnating is used, NO2 is collected with good repeatibility (CV 3,3 %). The NO, absorbed in the sampler was stripped from the sorbent with a methanol 5% (v/v) aqueous solution and was determined by colorimetry as nitrite by using the Griess-Saltzman reagent. The detection limit of 1,4 ppb for 60 min sampling at 0,5 L min(-1) flow rate was obtained. Preparation and conditioning procedures for TEA-C-18 cartridge, sampling flow rate, absorption capacity and interference of other species are discussed.
dc.languagepor
dc.publisherSoc Brasileira Quimica
dc.relationQuimica Nova
dc.sourceWeb of Science
dc.subjectnitrogen dioxide
dc.subjecttriethanolamine
dc.subjectGriess Saltzman reagent
dc.titleColorimetric determination of atmospheric nitrogen dioxide using preconcentration on C-18 cartridge.
dc.typeArtículos de revistas


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