Hi, Recently I've came through problems with testing a cheap virgin oil in my test processor which every time ended up with incomplete reactions (emulsion problems). I did make the process longer (2 hours) and at higher temperature (60-63 degC) - still nothing, though by product separation is very nice.
Today, I tried to titrate the oil and - to my surprise - it took 0.925ml of KOH solution. This was my first experience with titration, so I can also tell that the phenolophtalein solution turned pale (but noticable) magenta for about 15 secs (as described at JtF) after 0.925ml. After adding 1.05ml the colour got more intensive for longer time. My main question is - is it normal in case of cheap oils ? I suppose they contain (as other oils) some amount of FFAs, but so much ? Additional matter is whether I got titration right. I mean, interpreting the colours. I'm running out of ideas what could be wrong in the process, so any help is appreciated. -- cheers, Rafal Szczesniak **mir[at]diament.iit.pwr.wroc.pl Samba Team member mi***[at]samba.org +---------------------------------------------------------+ *BSD, GNU/Linux and Samba http://www.samba.org +---------------------------------------------------------+ _______________________________________________ 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/
