Development of an intelligent canister/cartridge sampler for the collection of ozone precursors or air toxics

摘要

In 1993 we designed and built an intelligent sampler capable of collecting eight canisters and eight DNPH cartridges to meet rigorous Enhanced Ozone Monitoring requriements for SOutheastern Wisconsin. working from the multicanister/multicartidge sampler design, we have developed a smaller sampling unit to collect samples for ozone precursors, reformulated fuel additives, and general air toxics. A s ite-based computer tracks all samples from the sampler setup, though sampling, to sampler take down. Relevant sampling data usch as initial canister vacuum, final canister pressure, and sampling flow raters are all recorded by the sampler. At the completion of the sampling episode all sampling data are down loaded to the project database. Software for the original and the new sampler has been revised to include internal and external Quality Assurance procedures. We will report on the design of the new sampler improtant software revisions, and the sampler performance during an intial season of sampling.