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Karl Fischer Water Test

ASTM method - D6304

The Karl Fischer Test

The Karl Fischer Test quantifies the amount of water in the lubricant.

Operating Principle

A reagent is titrated into a measured amount of sample and reacts with the OH molecules present in the moisture. This depolarizes an electrode and determines the titration endpoint. Results are reported as either % water or ppm (1% = 10,000ppm).

Significance

Water seriously damages the lubricating properties of oil and promotes component corrosion. Increased water concentrations indicate possible condensation, coolant leaks, or process leaks around the seals.

Applications

All lubricants, especially effective in systems sensitive to water.


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