How to Measure Water In Oil Noria Corporation Water is perhaps the most harmful of all contaminants with the exception of solid particles. While the presence of water is often overlooked as the primary root cause of machine problems, excess moisture contamination can lead to premature oil degradation , increased corrosion and increased wear. Moisture, upon contaminating hydraulic and lubricating oils, has a degrading effect to both the lubricant and the machine itself. While some additives adsorb to the water and are removed when the water separates from the oil, others are destroyed by water-induced chemical reactions. Essentially, water represents a real risk to equipment and should be aggressively controlled. The Varying States of Water Water coexists with oil in either a dissolved or a free state.

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A number in parentheses indicates the year of last reapproval. A superscript epsilon? This standard has been approved for use by agencies of the U.

Department of Defense. Scope 1. Inch-pound units are provided for information only. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

For speci? Referenced Documents 2. Summary of Test Method 3. Interferences 5. Current edition approved Dec. Published December Originally approved in Last previous edition approved in as D — 92, which was withdrawn in January and reinstated in December DOI: One part per million of sulfur as mercaptan causes an error in the titration, equivalent to approximately 0. Apparatus 6. See Note 1. NOTE 1—Any apparatus that will give equal or better precision is acceptable.

Reagents and Materials 7. Unless otherwise indicated, it is intended that all reagents shall conform to the speci? For each litre of solution, dissolve 85 6 1 g of iodine in 6 2 mL of pyridine in a dry, glass-stoppered bottle. Add 6 2 mL of methanol Cool the mixture in an ice bath to below 3. Continue the addition of SO2 until the volume is increased 50 6 1 mL. Alternatively, add 50 6 1 mL of freshly drawn liquid SO2 in small increments to the precooled mixture in an ice bath.

Pharmaceutical Convention, Inc. United States 1 D? Strong oxidizer. Contact with organic material can cause? Can be fatal if swallowed. Liquid and vapor can cause severe burns. Harmful if inhaled. Contact with water liberates large amounts of heat. Spillage can cause? NOTE 3—If Caution, the reaction is vigorous. When the reaction is complete, add 3 L of methanol. Vent the system through a drying tube during the distillation. NOTE 4—Follow standard safety precautions for handling toxic gases.

Record the mass. Stopper the? NOTE 5—To facilitate transferal of the tartrate to vessels having constricted openings or narrow necks, a spatula with the tip bent at a right angle to the handle is satisfactory.

Warning—Can be fatal if swallowed. Can produce toxic vapors if burned. Sampling 8. Standardization of Karl Fischer Reagent 9. Insert the stopper and adjust the magnetic stirrer to give a smooth stirring action. Turn on the indicating circuit and adjust the potentiometer to give a reference point with approximately 1? A of current? Add Karl Fischer reagent in suitable amounts to the solvent to cause the needle to de?

As the end point is approached, the needle will fall back more slowly after each addition of Karl Fischer reagent. The end point is reached when, after the addition of a single drop of reagent, the needle remains de?

A from the reference point for at least 30 s. Reweigh the weighing pipet. Titrate to the end point as described in 9. Procedure It is important to stopper the sample inlet tube as quickly as possible to prevent absorption of moisture from the atmosphere. Immediately pipet 50 mL of the sample into the titration?

Alternatively, the sample can be weighed and added to the titration? Record the millilitres of reagent used. Calculation or Interpretation of Results Precision and Bias Difficulties encountered in distributing stable samples have prevented development of additional data.

Keywords Some stopcock greases are affected by Karl Fischer reagent. All possible precautions must be taken to prevent absorption of moisture from the atmosphere. Cracks between glass and stoppers should be sealed with a suitable sealing material and necessary openings should be protected by the use of drying tubes containing anhydrous calcium sulfate.

A and an internal resistance of approximately ?. Approximately 7. Bend the glass tubing slightly about 20 to 30 mm above the seal as shown in Fig. Make a small loop approximately 6. Place sufficient mercury in the glass tube to provide contact for the leads to complete the circuit. Two electrodes are required. Care should be exercised that cracks do not develop around the seal, which will make the electrodes useless.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phone , fax , or service astm. Permission rights to photocopy the standard may also be secured from the ASTM website www.


ASTM D1744 (1996)



ASTM D1744



How to Measure Water In Oil


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