Water in crude oil

it's called volumeteric karl fischer for water content (100ppm to 100 % of water)

N.B:

100ppm = 0.0001%

Sorry to be pedantic but 100ppm = 0.01%

Thanks, but a need a portable equipment that a can use on the field.

There are two methods of tests at lap using pinch top: a. Distillation and b. Conductivity, but I don't have any information about the availability of a portable device.

Hi,

distillation is plagued by the problem of separating the water from the other volatile compounds,

the conductivity method is plagued by the nonuniform salt content of the water: only the ionic condustivity of the salts in the dissolved water is measured.

There was a capacitive device able to measure in field, if necessary I can dig my old papaers.

I would try distilling with subsequent water absorption in either CaCl2 or other highly hygroscopic material. This absorption would not absorb (disturbing amounts of) hydrocarbons.

RHABE

Hi Paulo,

http://www.utahbiodieselsupply.com/biodieselwatertestkit.php

I used this device for testing biodiesel,waste vegetable oil & methanol for water content.

Very good results, accurate to 0.1% the manufacturer claims to 0.01%

Uses a reagent that reacts with water & produces hydrogen gas..... Pressure

Very portable, you just have to keep the reagents [chemicals] dry.

Contact Kittiwake Developments Ltd, Littlehampton, Sussex England.

www.kittiwake.com

Email them at marketing@kittiewake.com

They produce manual and electronic kits and online monitoring equipment to test water, lubricants, fuels throughout the world. World leaders and have bought out all the other companies that sold inferior quality kits. Starting in the worldwide strict marine world they now service all industries. Most orders are usually posted within 24 hours.

This article in Physicsworld relate to a product form Smart Holograms.

While it is not yet a continuous measurement system, it could be converted into one.

Or the swelling principle could be adapted to a different measurement system.

Have you tried, or looked at Karl Fischer titrations for water content? Suggest you start there. The reagent is sold in most chemical supply houses.