Otro
Construção de amostrador passivo de baixo custo para determinação de dióxido de nitrogênio
Registro en:
Química Nova. Sociedade Brasileira de Química, v. 29, n. 2, p. 365-367, 2006.
0100-4042
10.1590/S0100-40422006000200029
S0100-40422006000200029
S0100-40422006000200029.pdf
Autor
Melchert, Wanessa R.
Cardoso, Arnaldo Alves
Resumen
A new passive sampling system for monitoring NO2 in air has been developed to measure gas concentrations in indoor and outdoor air. The sampler is inexpensive, and easy to construct and operate. Nitrogen dioxide forms a derivative after reaction with a filter coated with triethanolamine and ethyleneglycol. The nitrogen dioxide derivative is extracted from the filter, and the concentration is determined by colorimetry. To test the sampler for measuring ambient level nitrogen dioxide, measurements were carried out inside homes and in a range of workplace environments. Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)