Guardian System for the Continuous Operation of Large Soxhlet Extractors (PDF)

THE used carbon by USPHS adsorption and other method investiis used by USPHS and other investigators of water quality to recover dissolved organic constituents from water.1 This process involves the slow passage of water through activated carbon to achieve adsorption. Desorption is accomplished in the laboratory by use of large Soxhlet extractors and requires 24 hr or more of extraction. An automatic guardian system, designed to permit safe unattended operation of the apparatus, is described below.