Stopcock Assembly Only

Modular PYREX Accelerated One-Step extractor-concentrator performs extraction, concentration, and drying with the same apparatus and is designed for use with solvents of heavier specific gravity than sample being extracted.  Extraction and concentration can be done in 1/3 of the time. Pesticides can be completed in 5.5 hours instead of 18 hours for normal liquid-liquid extractions. BNA's extraction time reduces from 36 hours to 12 hours.  Extraction process requires only 100 mL of solvent versus 500 mL , an 80% reduction. This reduces solvent emissions (solvent recovery is built in), solvent cost, and solvent disposal. No separate extract drying required due to use of a hydrophobic membrane. The Teflon hydrophobic membranes are disposable eliminating the risk of sample-to-sample contamination. Meets the requirements of EPA SW-846 method 3520 and EPA Waste Water method 625 allowed in CLP statement of work OLMO2.0 for semi-volatiles and pesticides.  Extraction and concentration steps can be performed outside the hood. However, as dictated by safe laboratory practices, it is recommended that some type of ventilation system be used above or near the units in case of a drop in condenser water temperature or loss of condenser cold water supply. Removable Snyder column sidearm allows easy cleaning.  The required concentrator tube (1234B38 or 1234B39) and the Allihn condenser (4406K40) must be purchased separately.