"SOLID-PHASE EXTRACTION OF NON-VOLATILES FROM AQUEOUS AND NON-AQUEOUS MATRICES--A SAMPLE PREPARATIVE TECHNIQUE FOR THEFIELD AND LAB"

SOLID-PHASE EXTRACTION, A CURRENTLY DEVELOPING TECHNOLOGY MAY BE USED FOR ENVIRONMENTAL SAMPLE PREPARATION. THE PRESENT METHODLOGY OF LIQUID/LIQUID EXTRACTION IS NOT PRAC- TICAL IN THE FIELD. MANY INVESTIGATORS HAVE STUDIED SOLID- PHASE EXTRACTION. HOWEVER, THESE WORKS ARE LIMITED TO NAR- ROW CLASSES OF COMPOUNDS. NO OVERALL METHODOLOGY IS AVAILA-BLE FOR PREPARING A SAMPLE CONTAMINATED WITH MULTIPLE CLASSES OF COMPOUNDS (I.E., PRIORITY, POLLUTANTS, ACIDS, PESTICIDES, HERBICIDES, ETC.). AN OVERALL METHODOLOGY WOULD BE DEVELOPED FOR PREPARING ENVIRONMENTAL SAMPLES CON- TAMINATED WITH "NON-VOLATILES" APPLICABLE TO BOTH SOILS AND WATERS. THIS DEVELOPMENT WOULD INCLUDE ESTABLISH-ING RECOVERIES OF SPIKED COMPOUNDS FORM VARIOUS MATRICES. THE NOVELTY OF THIS DEVELOPMENT WOULD BE THE ABILITY T EXTRACT NON-VOLATILES FROM SOLID MATRICES UNDER FIELD CON- DITIONS AND ENABLE REDUCTION OF LARGE SOLVENT USE FOR SAMPLEPREPARATION, THUS REFUCING WASTE GENERATION BY LABS (I.E., SMALL GENERATORS).