Description
Water determination according to the Karl Fisher method is an analytical chemical method that uses coulometric titration or volumetric titration to determine traces of water in a sample. This method was invented in 1935 by the German chemist Karl Fisher, it corresponds to the standard NF EN ISO 12937 which is an administrative specification for gas oil, non-road gas oil (NGD) and heating oil (HHO). The administrative specifications allow a maximum of 200 mg of water per kg of diesel fuel or heating oil.
The jet fuel is the fuel that requires the utmost vigilance with respect to the presence of water. The AFQRJOS (Aviation Fuel Quality For Jointly Operated Systems) specifications require that the ability of jet fuel to release the water it contains be checked. It must be treated by decantation and filtration. The standard method Micro Separometer Rating ASTM D 3948 measures the ability of a jet fuel to release water when it passes through a coalescing medium. However, the Karl Fisher method, if it is not part of the AFQRJOS specifications, also applies to jet fuels for the determination of water.
Notice
There's no notice yet.