Modern Laboratory Procedures for Measuring Organic Crop Protection Chemicals

TL;DRAbstract

The quantitative determination of organic crop protection chemicals in environmental samples presents challenging analytical problems. For instance, some of the newer classes of pesticides must be analyzed at trace levels; they can affect plant growth at concentrations of 0.1 µg kg-1 (ppb). Confirmation of these chemicals at trace levels is difficult. Their analyses in soil and water also can seldom be performed directly because of the trace level of the chemical in the matrix compared to the amount of interfering substances. Some chemicals present challenges because they are polar and thermally labile. Analysis is a multistep process involving extraction, sample preparation, and quantification. In this chapter, advantages and disadvantages of the some of the newer extraction techniques (e.g., solid-phase extraction, supercritical fluid extraction, and accelerated solvent extraction) and methods of separation (e.g., supercritical fluid chromatography and capillary chromatography) are d

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