A new fluorescence method for determination of ozone in ambient air

被引：36

作者：

Felix, Erika P. ^{[2
]}

Passaretti Filho, Juliano ^{[1
]}

Garcia, Gabriel ^{[1
]}

Cardoso, Arnaldo A. ^{[1
]}

机构：

[1] UNESP, Dept Analyt Chem, Inst Chem, BR-14801970 Araraquara, SP, Brazil

[2] UFTPR, Dept Biol & Chem, BR-80230901 Curitiba, Parana, Brazil

来源：

MICROCHEMICAL JOURNAL | 2011年 / 99卷 / 02期

基金：

巴西圣保罗研究基金会;

关键词：

Ozone determination; Air analysis; Indigotrisulfonate; Ozonolysis; Fluorescence; Sulfoanthranilate; INDIGO; TROPOSPHERE; WATER;

D O I：

10.1016/j.microc.2011.07.006

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new simple method for determination of ozone in ambient air is presented. The reaction employed is based on the known ozonolysis of indigo dye. The indigotrisulfonate molecule contains one carbon-carbon double bond (C C), which reacts with ozone and generates isatinsulfonates and sulfoanthranilate. The quantitatively formed sulfoanthranilate presents fluorescence (lambda(ex) 245 nm, lambda(em) 400 nm). Ozone was collected using two cellulose filters coated with 40 mu L of 1.0 x 10(-3) mol L-1 of indigotrisulfonate. The analytical response was linear in the range 0-150 ppbv ozone, and a detection limit of 7 ppbv was achieved using a sampling time of 15 min and an optimum sampling air flow rate of 0.4 L min(-1). There was no interference from sulfur dioxide, formaldehyde or nitrogen dioxide. The ozonolysis mechanism and the reaction products are discussed. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：530 / 534

页数：5

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