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Hi Golan; You can use a hydrometer in the range of 0.7 to 0.9 to measure the specific gravity of your methanol. The hydrometers are usually calibrated for 16 degrees C though so measuring at room temperature will result in a lower reading. What I did was get some very pure methanol and some water and let them sit at the ambient temperature and then acurrately measure small amounts of water and add to a measured amont of methanol. Take the readings and make a graph to show the percentage water ( volume /volume) at the temperature you are working at. Then you can use the hydrometer as a gauge of your water content. This may not be perfectly accurate but will be good enough to tell you if your methanol is contaminated. If you have a temperature close to 23 degrees you can use my data, it is here: http://www.nonprofitfuel.ca/Reactor.html Best regards. Joe Golan Shmuel wrote:
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