Inquiry (采购产品): N-Evap tubing questions I work in an environmental laboratory that has used two of your N-Evap systems for many years. We have been determining PCBs and pesticides in a variety of matrices and while evaporating straight solvent (toluene) in one of our N-Evaps found a PCB background. We think that flexible tubing has become contaminated with PCBs and the Nitrogen is stripping them off when blown through the lines. We would like to replace the tubing with something less permeable. Do you carry any different type of tubing for these evaporators? Otherwise we've been looking for alternatives to replace it ourselves. **** Hidden Message ***** Kathy Echols 4200 New Haven Road Columbia, MO 65201 USA Company: USGS CERC Title: Research Chemist Phone: 573-876-1838 E-mail: kechols@usgs.gov **** Hidden Message ***** kechols@usgs.gov
