Publisher Summary This chapter discusses the sample preparation for water analysis. It focuses on the organic pollutants. Water analysis deals with very different types of aqueous samples, such as ground and surface water used directly or indirectly for drinking water production, rain water, municipal and industrial wastewater and process water. These various kinds of water may differ not only with respect to the types of pollutants encountered, but in particular with respect to the pollution level, which has to be considered during sampling, sample preparation and instrumental analysis. In organic analysis, sample preparation is often restricted to the extraction of pollutants from the aqueous sample while a further cleanup is only required with highly polluted samples or in ultra-trace analysis. Water samples do not only consist of the aqueous, but also of a solid phase in form of suspended particles. Hydrophobic compounds may be adsorbed onto these particles. Many standardized methods of water analysis include a filtration step using—for example, a 0.45 μm membrane filter that removes the larger fraction of these suspended particles.
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