Methanol testing, recovered methanol, purity, and process?

[julianf]

I think there should maybe be mention of calibration with a 'known' good sample.

In which case, it does not really matter too much what the scale etc. is - what matters is if the sample tested reads the same as the known good.

(and, as tony suggested, further calibration can be done by adding water to the sample)


I guess the thing im trying to get across is, so long as the hydrometer floats, and changes level etc. it does not matter so much what the marks inside say, so long as its calibrated by us on purchase.

[thewormman]

I've never seen that with any methanol I've recovered.

Are you sure it's bio?  Bio is miscible with methanol.  Will it mix?

Bio has an sg of between 8.6 - 9 and methanol 7.91, so significant quantities could adversely effect the reading.

I can't remember further back in the post, but is the hydrometer reading up to 100% alcohol (it's not clear from the photo), if so they are not the most accurate indicators, but should be adequate for our use.  Personally I wouldn't hang my hat on the reading being very accurate, but it should be a good indication that the methanol is OK to re-use.

Bit misleading that pic the meth has a brown tinge to it all the way through how the camera is it makes it look like a layer on top there isn't its all the same colour.

Yes it does read up to 100% I know it's not lab grade but if it says 98-99% as Jim says his does and it's ok since I am using one of his processors I will use it.

In fact I have just completed the first stage with about 6 litres of it, 10/90 says 2ml drop out so good so far fingers crossed