I need to measure the purity of methanol that has some impurities, mainly water and a few salts. Right now I am assuming it is a mixture of water and methanol, and I am using density as an indicator of methanol purity, but I am not sure about my results. Is there other simple ways of knowing the total methanol concentration in my solution? Or is density a good indicator?
The range of methanol mass concentration goes from 50 to 100% w/w.
over time methanol absorbs water from the air. Each time you open a container of methanol, it absorbs a little water. If you have a drum of methanol with a pump installed in the bung, normal heating and cooling forces air in and out of the drum. That air contains water until the methanol absorbs it. Water in our methanol can cause problems for us when we make biodiesel. That is why it is important to have a test that checks the purity of our methanol.
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