2 replies to this topic

[Andree]

Dear all,

Could somebody give me advise, how to measure water content in hydrocarbon liquid (for example in diesel fuel)? I found that a standard method is Karl Fischer coulometric titration - could somebody provide me details of this analysis, and what equipment is needed to perform this (using standards for ASTM D-1744)? To be honest I have no analytical laboratory available and need to measure this - what do I need to purchase?

I suppose that this method gives information on total water. Is there any technique which allow to estimate a free (non-dissolved) water concentration?
Of course: total - solubility = free water, but the solubility must be known and I do not know this (and how it changes with temperature).

Regards,
Andrzej

[JMW]

Visit Kitiwake or any of the fuel test laboratory web sites and you will find them able to answer this.
Kitiwake produce a fuel test kit for use on board vessels or in power stations.
Many of the fuel test companies (e.g. DNV PS, SGS, Viswa Lab include some of the information you are looking for.

Dear all,

Could somebody give me advise, how to measure water content in hydrocarbon liquid (for example in diesel fuel)? I found that a standard method is Karl Fischer coulometric titration - could somebody provide me details of this analysis, and what equipment is needed to perform this (using standards for ASTM D-1744)? To be honest I have no analytical laboratory available and need to measure this - what do I need to purchase?

I suppose that this method gives information on total water. Is there any technique which allow to estimate a free (non-dissolved) water concentration?
Of course: total - solubility = free water, but the solubility must be known and I do not know this (and how it changes with temperature).

Regards,
Andrzej

[contextion]

ASTM says you can use a cetrifuge