Solid-phase extraction (SPE) is a sample preparation technique routinely used in analytical laboratories for the extraction of analytes from a complex matrix. This sample preparation technique enables the extraction, cleanup and concentration of analytes
SPE was used to concentrate trace amounts of organic pollutants present in wastewater samples, but its use has now extended to a wide variety of matrices including oil, serum, milk, blood, urine, plant and animal tissues, and pharmaceutical preparations
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