Determination of the water content in lubrication oils, greases, and polyol-based hydraulic oils

摘要

Karl Fischer titration, owing to its excellent reproducibility and accuracy as well as its ease of use, numbers amongst the most important water determination methods and accordingly figures in numerous international standards. Even difficult samples such as lubrication oils and greases can be analysed in a very convenient and reliable way by using the gas extraction technique. Side reactions caused by additives or handling problems due to the high viscosity of the samples can be eliminated. Liquid samples with high water content can be analysed by using a proper pipetting equipment for automated sample injection, thus avoiding handling errors.