A sequential cartridge sampler for measuring carbonyls and toxic organic compounds
- Atmospheric Technology, Calabasas, CA (United States)
A multi-channel sequential sampler has been developed to collect carbonyl compounds with silica gel or C-18 cartridges using EPA Method TO-11. The sampler automatically draws ambient air through the cartridges over a predetermined time sequence. The sample flow rate is continuously controlled and monitored using mass flow controllers. An additional channel is provided so that duplicate samples can be simultaneously obtained. The sampler can be interfaced with a micro-computer to provide custom timing sequences, acquire and store flow rate data, and perform quality assurance procedures. A field test was conducted in Claremont, California, using AtmAA C-18 cartridges to samples of formaldehyde. The results show good agreement with values obtained with a Tunable Diode Laser Absorption Spectrometer. Additional testing has also been performed to demonstrate long term reliability of the sampler.
- OSTI ID:
- 197329
- Report Number(s):
- CONF-9405167--
- Country of Publication:
- United States
- Language:
- English
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