Skip to main content

Atmospheric Formaldehyde Monitoring in the Greater Houston Area in 2002

Buy Article:

$29.00 plus tax (Refund Policy)

Abstract:

A laser spectrometer based on difference frequency generation (DFG) was deployed for real-time long-term monitoring of HCHO concentrations at an environmental monitoring site located at Deer Park, Texas, in the Greater Houston area. Three HCHO concentration measurements were made during the periods of July 20-31 (period I), August 2-14 (period II), and August 24-September 25 (period III), 2002. In periods I and II, differences in HCHO concentrations are apparent between day and night measurements, with elevated concentrations during daylight hours. Most of the HCHO peak values are less than 20 ppbV except for two intense peaks on August 02 (~25 ppbV) and August 04 (~30 ppbV). The formaldehyde concentration levels in ambient air at the measurement site are produced mainly by the photochemical oxidation of volatile organic compounds (VOCs) caused by intense sunlight during periods I and II. This observation was made based on a comparison with the ozone concentration, solar radiation, temperature, relative humidity, and wind speed data obtained from the Texas Commission on Environmental Quality (TCEQ). During period III, data collected by a time-integrating wet-chemical technique are compared to the data collected by the spectroscopic instrument.

Keywords: DIFFERENCE FREQUENCY GENERATION; FORMALDEHYDE DETECTION; LASER ABSORPTION SPECTROSCOPY; LASER DIODES

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370204322843002

Affiliations: Department of Chemistry, Rice University, 6100 Main St., Houston, Texas 77005

Publication date: February 1, 2004

More about this publication?
sas/sas/2004/00000058/00000002/art00015
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more