Re: IPA type for 3.5mm connector cleaning
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Oh. Like separating sugar from gasoline by adding water, agitating and siphoning off the walter/sugar solution. I hadn't thought of that. Cool. Thanks.
On Sun, Feb 16, 2025 at 17:56 Roger Henderson via <hendorog= [email protected]> wrote: My simple minded approach: IPA can be purified using a salting out process - because salt is not soluable in IPA but is soluable in water.?
I dont know which process is actually used. But because I worry about residual salt in the remaining water portion, I avoid the low conc. versions.
Roger AFAIK, the difference between IPA solutions of different concentrations is the amount of water in them. IPA is naturally hydroscopic and will absorb water over time. For lab purposes, I use the highest concentration that I can find in the local stores, which is usually 99% IPA.
I've actually been wondering if there is an easy method to determine the concentration of water in IPA solutions, since I assume that 99% IPA becomes less concentrated as it is exposed to the atmosphere over time. Perhaps specific gravity measurement.
Hi,
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I am trying to clean the connector threads and surface of my 3.5mm VNA Calibration kits.
Keysight manual says use IPA but it doesn't say what kind of IPA. My local CVS has 70% and 91%, amazon has 99.9%.
Which one the best and saftest for the delicate devices like a cal kit?
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Regards,
Calvin
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