Document QMJ4KwXwxYeem7oO6Q8j6K86o

AR226-2440 p-I I '- ^ DOU6HTJF ., ^/21/97 01:39 PM i To: cc: Subject: ZIPFEL, PECKSR ROWANPE , REFSHACJ . C81NFEP CRAWLEPG , SAKSA I discussed your request to determine if any C8 was present in.FEP ,, sample SMCFEP-14-2 1/30/97 with Paul Rowan. We decided that the most sensitive approach we could take to obtain data independent of the current GC method would be to heat some of the polymer in the solids probe of the Mass Spec and monitor the gasses evolved. After measuring the sample we decided a control was needed to determine what would happen to a sample known to contain C8.. The sample you provided was "Freeze. Dried FEP Wet Cake". it The sample, known -bo have C8 in evolved C8 at low temperatures. At high temperatures a smaller amount of something that gives a spectra similar to C8 but with the normal 45 mass number peak replaced by 44 was obtained. . The original sample did not evolve any C8 at low temperatures but did show the same C8 like compound at high temperatures. : It This suggested the C8 might be present as a salt that was less volatile and decomposed to give carbon dioxide which has a mass did an analysis of the sodium salt of C8. showed the higher decomposition and did produce a spectra with the 44 ion however the peaks was not quite the same. hi. of 44. Paul temperature the ratio of IfOur conclusion is that there may be some C8 in the original sample. present, it is in a salt form. EID936425