Ugucione, Cássia [UNESP]Gomes Neto, José de Anchieta [UNESP]Cardoso, Arnaldo Alves [UNESP]2022-04-282022-04-282002-05-01Quimica Nova, v. 25, n. 3, p. 353-357, 2002.0100-4042http://hdl.handle.net/11449/224272An 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.353-357porGriess Saltzman reagentNitrogen dioxideTriethanolamineArtigo2-s2.0-0036586683