Abstract
The passive sampling approach is more attractive, especially for long-term monitoring programmes, because it is economical and easy to perform and time-weighted average (TWA) concentrations of target analytes can be obtained with one sampler. Some passive samplers can be analyzed directly. Therefore, no complicated sample preparation treatment is required. Passive sampling techniques for measuring organic compounds in soils and sediments should be rapid, low cost and provide a high yield of information. The chapter discusses the most developed passive soil gas sampling techniques, such as the PETREX sampling system, the GORETM module, and the Emfluxs passive sampling system that are used for site screening. The concentration of analytes in the sample cannot be quantitated. The Semipermeable membrane devices (SPMDs) and the samplers based on solid-phase microextraction (SPME) technique can obtain the TWA concentrations of analytes in the sample, by using PRCs or infibre standardization technique. These techniques are being developed to get more accurate calibration result.
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