Trace organic compounds in rain. 1. Sampler design and analysis by adsortion/thermal desorption (ATD)

Journal Article · Tue May 01 04:00:00 EDT 1984 · Environ. Sci. Technol.; (United States)

DOI:https://doi.org/10.1021/es00123a005· OSTI ID:6733746

Pankow, J F; Isabelle, L M; Asher, W E

The design and sue of a rain sampler with a 0.89-m/sup 2/ collection surface area are described. The sampler is controlled electronically, provides for the in situ filtration of the sample, and carries out the preconcentration of nonpolar organic compounds by means of cartridges of the sorbent Tenax-GC. Analytical results were obtained for 27 compounds by fused silica capillary column gas chromatography with detection by mass spectrometry for four rain events sampled 12 km southwest of Portland, Or, at the Oregon Graduate Center (OGC), and for five rain events sampled in southeast Portland. Mean dissolved rain concentrations for ..cap alpha..-hexachlorocyclohexane (..cap alpha..-HCH), naphthalene, acenaphthylene, fluorene, and phenanthrene were 5.9, 11, 4.7, 3.2, and 24 ng/L, respectively, at OGC. The mean values for the Portland events were 47, 72, 55, 43, and 140 ng/L, respectively. Since dissolved concentrations were measured, the data were also used in conjunction with available Henry's law constants to estimate the concurrent, local atmospheric levels of these compounds at these sites. Many of the H values of interest are available only near T = 298 K. Therefore, the further understanding of the wet deposition of toxic organic compounds will be facilitated by the direct study of wet deposition as well as by the determination of the temperature dependence of the H values of environmentally interesting compounds. 36 references.

• Research Organization: Oregon Graduate Center, Beaverton
• OSTI ID: 6733746
• Journal Information: Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 18:5; ISSN ESTHA
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AROMATICS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
CONDENSED AROMATICS
DATA
DESIGN
ECOLOGICAL CONCENTRATION
EQUIPMENT
EXPERIMENTAL DATA
FEDERAL REGION X
FLUORENE
GAS CHROMATOGRAPHY
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
MASS SPECTROSCOPY
NAPHTHALENE
NORTH AMERICA
NUMERICAL DATA
OREGON
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHENANTHRENE
RAIN WATER
SAMPLERS
SAMPLING
SEPARATION PROCESSES
SORPTION
SPECTROSCOPY
TEMPERATURE DEPENDENCE
USA
WATER