Tenax 2, 6-diphenylene oxide

An inert gas is bubbled through the sample. The volatile hydrocarbons are transferred into the vapor phase and trapped over a sorbent bed containing 2,6-diphenylene oxide polymer (Tenax GC). A methyl silicone (3% OV-1 on Chromosorb-W, 60/80 mesh) packing protects the trapping material from contamination. Other adsorbents such as Carbopack B and Carbosieve S III may also be used. If pentane and other low boiling hydrocarbons need to be detected, the sorbent trap should be filled with activated charcoal, silica gel, and Tenax, respectively, in equal amounts. 

Use a trap not shorter than or narrower than 25 cm x 2.67 mm (id). Pack the trap to contain the indicated minimum lengths of adsorbents in the following order, beginning at the trap inlet 7.7 cm of 2,6-diphenylene oxide polymer (TENAX GC, or equivalent), 7.7 cm of silica gel, and 7.7 cm of coconut charcoal. 

A stream of nitrogen gas was passed through freshly collected mother s milk and the effluent collected by adsorption on a Tenax TA resin (2,6-diphenylene oxide based). Subsequent desorption into a GC-MS instrument led to the identification of 21 volatile components (low-molecular-weight aldehydes, ketones, alcohols, and lactone) in the milk headspace. When each was screened for behavioral activity, one, 2-methylbut-2-enal (34), was clearly the main compound responsible for eliciting searching—grasping responses in the rabbit pup test subjects. 

A method described by Buckholz et al (21) employs the use of the adsorption polymer Tenax GC (peira 2,6 diphenylene oxide) to collect volatiles from roasted peanuts. Two types of peanuts Runner 1 cind Spcinish were roasted. 

One-third of the trap is to be filled with 2,6-diphenylene oxide polymer, commonly called Tenax. 

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