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,
?
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?
?
Regards,
Calvin
