Crude oil electrical condutivity

[rcoutinho]

I´m working with crude oil desalters and to make the transformer specification I need to know the crude oil electrical condutivity. How can I measure it? Is there a standardized method? Is there a comercial lab equipment that I could test how the temperature affect this property?
Thank you for your kind attention,

 

[25362]

See ASTM D 4308-95(2000).