On May 2, 2007, at 5:59 PM, shawn patrick wrote: > I have a question about the purity of Isopropyl alcohol. > Will 90% yield good results or does it have to be 99%??
The other responses are technically correct -- however, the isopropanol is only being used as a solvent for the FFAs in the oil you're testing, so it's not very critical. I had some gas-dry isopropanol that started to get slightly acidic after several months in the bottle. I started titrating the isopropanol first (without the oil), then adding the oil and titrating again. Worked fine, and added 20 sec. to the process. -K _______________________________________________ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
