Método colorimétrico para determinação de dióxido de nitrogênio atmosférico com preconcentração em coluna de C-18
| dc.contributor.author | Ugucione, Cássia [UNESP] | |
| dc.contributor.author | Gomes Neto, José de Anchieta [UNESP] | |
| dc.contributor.author | Cardoso, Arnaldo Alves [UNESP] | |
| dc.contributor.institution | Universidade Estadual Paulista (UNESP) | |
| dc.date.accessioned | 2022-04-28T19:55:34Z | |
| dc.date.available | 2022-04-28T19:55:34Z | |
| dc.date.issued | 2002-05-01 | |
| dc.description.abstract | An alternative analytical method for nitrogen dioxide (NO2) in atmosphere was developed. The collection of NO2 is performed by a Sep-Pack C-18 cartridge impregnated with 11% (v/v) of triethanolamine 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 NO2 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. | en |
| dc.description.affiliation | Departamento de Quimica Analitica Instituto de Quimica de Araraquara Univ. Estadual Paulista J.D.M.F., CP 355, 14800-900 Araraquara - SP | |
| dc.description.affiliationUnesp | Departamento de Quimica Analitica Instituto de Quimica de Araraquara Univ. Estadual Paulista J.D.M.F., CP 355, 14800-900 Araraquara - SP | |
| dc.format.extent | 353-357 | |
| dc.identifier.citation | Quimica Nova, v. 25, n. 3, p. 353-357, 2002. | |
| dc.identifier.issn | 0100-4042 | |
| dc.identifier.scopus | 2-s2.0-0036586683 | |
| dc.identifier.uri | http://hdl.handle.net/11449/224272 | |
| dc.language.iso | por | |
| dc.relation.ispartof | Quimica Nova | |
| dc.source | Scopus | |
| dc.subject | Griess Saltzman reagent | |
| dc.subject | Nitrogen dioxide | |
| dc.subject | Triethanolamine | |
| dc.title | Método colorimétrico para determinação de dióxido de nitrogênio atmosférico com preconcentração em coluna de C-18 | pt |
| dc.title.alternative | Colorimetric determination of atmospheric nitrogen dioxide using preconcentration on C-18 cartridge | en |
| dc.type | Artigo |