Título
Multi-Gas analysis of ambient air using FTIR spectroscopy over Mexico City
Autor
Michel Grutter
Nivel de Acceso
Acceso Abierto
Referencia de publicación
URL/http://www.revistascca.unam.mx/atm/index.php/atm/article/view/8506
Materias
CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) FTIR spectroscopy - ([Atmósfera; Vol 16, No 1 (2003), ISSN: 0187-6236]) - ([Atmósfera; Vol 16, No 1 (2003), ISSN: 0187-6236]) air monitoring - ([Atmósfera; Vol 16, No 1 (2003), ISSN: 0187-6236]) - ([Atmósfera; Vol 16, No 1 (2003), ISSN: 0187-6236]) Mexico City - ([Atmósfera; Vol 16, No 1 (2003), ISSN: 0187-6236]) - ([Atmósfera; Vol 16, No 1 (2003), ISSN: 0187-6236]) CIENCIAS DE LA ATMÓSFERA - (CTI)
Resumen o descripción
A Fourier Transform Infrared (FTIR) spectrometer was used to analyze the composition of ambient air at a specific site in the Mexico City metropolitan area. A continuous flow of air was passed through a multi-pass gas cell and the absorption spectra were collected over a period of two weeks. Quantitative analysis was performed by means of the classical-least square (CLS) method using synthetically generated spectra as references and calibration sources. Ambient levels of CO, CO2, CH4 and N2O are reported with a time resolution of five minutes for September 2001, showing interesting results in their diurnal patterns. Comments on the precision, detection limits and signal-to-noise of the instrument are included for the evaluation of this technique. Water concentrations were estimated and compared with those obtained with a relative-humidity sensor. The technique of extractive FTIR for ambient trace-gas monitoring was utilized in Mexico for the first time and some potential applications are given.
Editor
Universidad Nacional Autónoma de México. Centro de Ciencias de la Atmósfera
Fecha de publicación
1 de enero de 2003
Tipo de publicación
Artículo
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Fuente
Atmósfera; Vol 16, No 1 (2003)
ISSN: 0187-6236
Idioma
Inglés
Audiencia
Investigadores
Estudiantes
Repositorio Orígen
Repositorio Institucional del Centro de Ciencias de la Atmósfera de la UNAM
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