[biofuel] Fwd: titration with acid for testing of finished product pH?
>Hi folks, > >Poking around on the internet this morning (good day for that, I'm way, >way sick with some superflu after talking biodiesel at people for 16 hours >at the Biodiesel Intensive Workshop last weekend). I found a little bit >more testing info that seems somehow relevant. >Supposedly there's a way to check for extra leftover catalyst by doing a >titration on some settled biodiesel, using an acid (I couldn't find more >details on which acid, whether it matters which acid, or any more detailed >info for that matter). This would possibly get around the issue of it >being difficult to use some pH test equipment on the stuff, no? I'm actually more worried about soaps than about residual catalyst, as it's easier to wash out the catalyst, I think, than the soaps. I'm doing pH testing partly to figure out when to stop washing, as well as for the initial 'look' at what I've made in additin to several other tests. Can someone think of how to run this titration to give meaningful results (ie what pH should one look for, and what does it reference?), or is anyone out there already doing something like this? I'm lacking in a chemistry background so there's probably some really standard stuff I'm just unaware of. Is there anything about the presence of soaps that would throw off a titration like this? >Girl Mark Yahoo! Groups Sponsor -~--> Sell a Home with Ease! http://us.click.yahoo.com/SrPZMC/kTmEAA/MVfIAA/FGYolB/TM -~-> 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/
Re: [biofuel] Fwd: titration with acid for testing of finished product pH?
Just add a few drops of the phenolphthalein that you use in your original oil titration to a few ml of your biodiesel. Warning -- either soap or alkali will turn it pink, since pure soap is itself alkaline. I don't know exactly the pH at which the pink happens, perhaps some chemist here knows the pKb of this indicator. If too high, there are others-K Yahoo! Groups Sponsor -~--> Is your business paying to much? Affordable insurance and benefits packages for Less. http://us.click.yahoo.com/jCP0DB/E.mEAA/MVfIAA/FGYolB/TM -~-> 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/
Re: [biofuel] Fwd: titration with acid for testing of finished product pH?
- Original Message - From: girl mark <[EMAIL PROTECTED]> > I'm actually more worried about soaps than about residual catalyst, as it's > easier to wash out the catalyst, I think, than the soaps. I'm doing pH > testing partly to figure out when to stop washing, as well as for the > initial 'look' at what I've made in additin to several other tests. > > Can someone think of how to run this titration to give meaningful results > (ie what pH should one look for, and what does it reference?), or is anyone > out there already doing something like this? I'm lacking in a chemistry > background so there's probably some really standard stuff I'm just unaware > of. Is there anything about the presence of soaps that would throw off a > titration like this? > Girl Mark, pH of final wash water is a good guide. A couple of drops of universal indicator in a sample of the wash water will quickly tell the story. I aim for neutral which is a green colour. Universal indicator is a mixture of various indicators and changes colour from red through to purple over a wide pH range. Much easier than test strips pH meters etc Regards Paul Gobert. Yahoo! Groups Sponsor -~--> Sell a Home with Ease! http://us.click.yahoo.com/SrPZMC/kTmEAA/MVfIAA/FGYolB/TM -~-> 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/
