Solid-phase extraction (SPE) is the most widely used sample preparation technique for assays of aqueous samples and organic extracts in laboratories. SPE provides fast cleanup, reduction in solvent usage and improved selectivity. SPE methods, using bonded silicas or other solid phases, is an alternative to liquid partitioning, and is amenable to automation.
Source:
HERBICIDES | Solid-Phase Extraction also : Chemical Analysis of Food: Techniques and Applications, 2012.
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