How to measure refrigerant moisture quickly and accurately
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Currently, moisture content needs to be tested in various refrigerants; many manufacturers require it to be below 5 ppm. During the testing process, low temperatures can cause condensation of water in the samples, and a slight carelessness during analysis can result in the moisture level exceeding the specified limit. Karl Fischer titration using the Coulomb method, but the instrument stabilizes too slowly. Do you all have any good methods for doing this? I’d appreciate any advice. We use KF-1 for our control units, and KF831 from Mettler-Toledo for the finished products. How do everyone control the injection?
This post was last edited by qugd on 2020-6-11 at 13:41. In trace water analysis, the key is to prevent the sample from absorbing moisture from the atmospheric environment during sampling and sample transfer; this requires skilled operation and appropriate experience. When taking samples, one must consider the weather conditions; rainy, humid, or hot days should be avoided, while low temperatures, dryness, and clear skies are preferable ； Avoid open plastic bottles; prefer steel cylinders or hard glass bottles with sealed lids ； It is better to get a full bottle rather than half a bottle ； Avoid storing samples for long periods; it is advisable to analyze and test them as soon as possible after sampling ； It is not advisable to handle syringes or samplers with bare hands; gloves and a mask should be worn when performing sampling ； Coulomb method analysis is suitable. If I go to conduct an analysis, it is best not to have middle-aged men accompany me; instead, a young and beautiful woman should be by my side. I have **experience in this area.
There are no male colleagues in our analysis room. :D
There are people from their youth to middle age to just before retirement, and there are also beautiful women:D:lol
Install a dehumidifier in the first room! The second sampling method is syringe sampling; the speed still needs to be fast! I don’t know what method you use for sampling! We usually work with samples that have high volatility. Additionally, to analyze water in gases, a vaporizer must be used first!