An Evaluation of a Commercial Instrument for Chlordane and Heptachlor Sampling

A commercial pesticide sampler was evaluated for chlordane and heptachlor sampling. The sampler can obtain samples at rates up to 6.5 CFM through each of two collectors. Collectors are glass fiber filters impregnated with a polymeric medium. Chlordane and heptachlor appear to be collected by several modes: filtration, adsorption, diffusion and gas-solid partitioning. Analyses showed that the compounds were collected efficiently on the collector and retained. A detection level of approximately 20 parts per trillion can be obtained with a one hour sample. The sampler is flexible and quite easy to use. Several problems are associated with operation of the sampler. Suggested improvements are discussed in the report. Suggestions for further work are also included.