Specifications include, but are not limited to: GAS CHROMATOGRAH (GC OR GLC) WITH THE FOLLOWING FEATURES: Comparable to Varian Model 920 Aerograph Preparative GC Thermal Conductivity Detector (TCD) Separate Temperature Controls for Injector, Column and Detector Single gas flow system. Compatible with Helium, Nitrogen or Argon gas Capable of using 1/8” or ¼” (aluminum and/or steel) columns Capable of conveniently connecting to standard strip chart records Accessories needed: a. 1/8” and 1/4” columns (6’ & 10’ ft) fitted to oven and packed with neutral solid phase coated with SE-30 or comparable liquid phase that would be stable to 220 Deg C. Three columns of each kind. b. 6-12 Collection Tubes for samples isolated during preparative gc mode. c. A second thermal conductivity detector for potential replacement.