Southern California Air Quality Study: fall study. Final report

Technical Report · Fri Jul 01 04:00:00 EDT 1988

OSTI ID:6035191

Appel, B R; Tokiwa, Y; Povard, V

Atmospheric sampling was performed during the fall portion of the Southern California Air Quality Study (SCAQS), on six intensive study days in November - December 1987 at Long Beach Community College. The investigators measured nitrous, nitric, and hydrochloric acids, in addition to ammonia and nitrogen oxides. These species were sampled with annular denuders and a chemiluminescent NOx analyzer. Nitrogen dioxide measured by the NOx analyzer averaged about 13% higher than without denuders to remove interferents such as HNO/sub 3/ and HONO. HONO exhibited maxima between 0000 and 0600 hours, with 6-hour mean concentrations up to 14 ppb. Some evidence of artifactual HONO in the denuders was shown, however. HCL exhibited a diurnal maximum between 1000 and 1400 hours, with concentrations up to 15 ppb. HN/sub 3/ concentrations exhibited maxima during night or morning hours, with four or six hour averages up to 15 ppb.

• Research Organization: California Dept. of Health Services, Berkeley (USA). Air and Industrial Hygiene Lab.
• OSTI ID: 6035191
• Report Number(s): PB-89-168728/XAB; CA/DOH/AIHL/SP-50
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
AIR QUALITY
AMMONIA
CALIFORNIA
CHALCOGENIDES
CHEMICAL ANALYSIS
DOCUMENT TYPES
ENVIRONMENTAL QUALITY
FEDERAL REGION IX
HYDRIDES
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
NITRIC ACID
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION
PROGRESS REPORT
SAMPLING
USA