Effects of flow rate and temperature on thermal desorbability of polycyclic aromatic hydrocarbons and pesticides from Tenax-GC

Journal Article · Tue Nov 01 00:00:00 EST 1983 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00263a042· OSTI ID:6857328

Pankow, J F; Kristensen, T J

One factor limiting adsorption/thermal desorption (ATD) preconcentration techniques is the thermal desorbability of the analyte compounds. The behavior of a set of compounds including polynuclear aromatic hydrocarbons (PAH) and several pesticides on 0.110 g of the sorbent Tenax-GC was investigated as a function of desorption temperature and carrier gas flow rate. The recoveries obtained with helium at 11.2 mL/min are as follows: naphthalene, 99 +/- 1; fluorene, 70 +/- 1; ..cap alpha..-BHC, 97 +/- 8; heptachlor, 26 +/- 5; fluoranthene, 99 +/- 1; pyrene, 93 +/- 1; dieldrin, 120 +/- 3; DDD, 60 +/- 2;DDT 20 +/- 1; benzo(k)fluoranthene, 93 +/- 3; perylene, 89 +/- 2; and benzo(ghi)perylene, 88 +/- 5. The desorbing compounds were trapped on a fused silica capillary column at -30/sup 0/C. Excellent resolution and separation number performance was maintained despite the use of high desorption carrier gas flow rates. Estimates were made of the retention volume and desorbing peak width characteristics of several of the compounds on Tenax-GC at the desorption temperatures studied. 5 figures, 3 tables.

• Research Organization: Oregon Graduate Center, Beaverton
• OSTI ID: 6857328
• Journal Information: Anal. Chem.; (United States), Vol. 55:13
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
AIR
CHEMICAL ANALYSIS
ELECTRIC CONDUCTIVITY
GAS CHROMATOGRAPHY
DDT
DIELDRIN
FLUORENE
NAPHTHALENE
PERYLENE
PESTICIDES
DESORPTION
POLYCYCLIC AROMATIC HYDROCARBONS
PYRENE
WATER
ADSORBENTS
DATA ANALYSIS
EXPERIMENTAL DATA
FLOW RATE
GASES
HELIUM
HIGH TEMPERATURE
LOW TEMPERATURE
MASS RESOLUTION
MEDIUM TEMPERATURE
QUANTITATIVE CHEMICAL ANALYSIS
TEMPERATURE DEPENDENCE
AROMATICS
CHROMATOGRAPHY
CONDENSED AROMATICS
DATA
ELECTRICAL PROPERTIES
ELEMENTS
FLUIDS
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
INSECTICIDES
NONMETALS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE GASES
RESOLUTION
SEPARATION PROCESSES
400105* - Separation Procedures
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500200 - Environment
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520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)