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[StorminNorman]

The "Shake Em Up Test" is not considered reliable. The only way to accurately measure the soap content of bio diesel is to titrate it. Cut and paste from Rick Da Tech's site:

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"The Shakem Up Test
This test is widely used by home brewers to determine if their biodiesel is finished washing. The test calls for equal parts of water and biodiesel. Shake. If the biodiesel and/or water separate quickly and the wash water is clear then the biodiesel is finished washing. This test does not provide enough contact between the water and the biodiesel to provide accurate information. The water on bottom can still be clear while the biodiesel is loaded with soap and glycerine."

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My testing has shown improved results when a centrifuge is used to separate the water content after shaking it. A tube that is allowed to set and settle out clear, then reshaken and centrifuged would fail with a very small soap layer between the water and bio phases. Subsequent soap titration on that sample stock, which passed the shake test originally, would show soap levels above ASTM specs which are 60 PPM for KOH reacted fuel.

Norman

Anyone reading this please disregard. I have been informed (via PM) that no body here likes me or my posts, I guess Brucie took a poll among you. I bruised somebodies little ego and his inferiority complex showed. Sorry to have taken up so much of your time these last few years. I will let the uninformed continue to lead the unknowing, hope it works for you. I don't need the name calling for trying to help somebody avoid tearing up their equipment.

Norman