AUTOMATED EXTRACTION OF LARGE SAMPLES FOR ENVIRONMENTAL ANALYSIS USING ACCELERATED SOLVENT EXTRACTION (ASE)

摘要

The development and use of automated extraction technology for the environmental laboratory has enabled analysts to dramatically reduce the amount of organic solvents used and the amount of time required in the sample preparation process. These systems generally use sample sizes smaller than those used in Soxhlet or sonication extraction. In many cases this is acceptable, but there are situations where larger samples must be used in order to achieve the desired detection limits. For example, it is common to use 30 gram samples for the analysis of semivolatile compounds. If the samples are wet and require the addition of a desiccant such as sodium sulfate, the volume of the sample will be too large for the available extraction cells.