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| Making Biodiesel This is the place to discuss any aspects of making biodiesel. Tips, techniques, equipment, supplies, storage, etc. |
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25th July 2008, 11:50 AM
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 Phenolpthalein question Hi all, I've been playing with BD for a few years now with varying results. Sure, the Landcruiser runs fine on the product after it has had a thorough washing and settling period but the biggest bug bear I have is, as always, getting reliable titration result. I,ve been using a good quality electronic PH meter and a heated magnetic stirrer and have found that I am unable to get consistent titration that translates to a complete reaction with passable results. I have come to the conclusion that I should try Phenolpthalein indicator and see if this will give me more accuracy with my results. I've contacted some of the scientific suppliers here in Sydney and I have discovered that Phenolpthalein comes in all sorts of configurations, i.e 1% in ethanol, 0.5% in ethanol, L.R grade, etc. My questions are, What should I use? Where is the best place to get it here in Sydney. What should I be paying for it, I was quoted $36.00 for 100m of the 1% in ethanol solution plus $22.50 delivery. Is this what I should be paying? Any tips or suggestions would be greatly appreciated Thanks Mick    |
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25th July 2008, 01:23 PM
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| Re: Phenolpthalein question Hello MickE At $58.50 for 100ml of 1% Phenolphthalein I suggest you use Turmeric for the titration. Titrate to the darkest colour. For the easiest method of titrating you can not beat the World Famous Chopstick Titration Technique (Pat Pend) Follow the instructions for turmeric as an indicator |
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| phenolpthalein, suppliers, titration |
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