I thought I remember seeing this posted on JTF. On Thu, 30 Jan 2003, Ken Provost wrote:
> Mark writes: > > > > >Could somebody give me some info on how the results (in ml) of the > >crude titration that we do for biodiesel making correlate with ffa > >content (in percent). > > I depends on the molecular weight of the FFA, which of course depends > on the type of oil. One gram of NaOH will neutralize about 7 g of oleic > acid, which would be a typical FFA for the oils we use. So if your oil > titrates at 1 ml using 0.1% NaOH solution, you have 7 g of oleic acid > per liter (say 920 g) of oil, or 0.77% FFA. > > If you had some rancid rapeseed oil, high in free erucic acid (higher > molecular weight), each ml of NaOH solution in your titration would > be 0.92% FFA. If coconut with free lauric acid (lower mol wt.), 1 ml > equals only 0.54% FFA. > > Yahoo! Groups Sponsor > ADVERTISEMENT > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Biofuels list archives: > http://archive.nnytech.net/ > > Please do NOT send Unsubscribe messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. > Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
