of Petroleum and Petroleum Products (ASTM Practice. D ). MPMS Chapter Determination of Water in Crude Oil by the Distillation Method (ASTM Test. ASTM D Standard Test Method for WATER IN PETROLEUM PRODUCTS AND BITUMINOUS MATERIALS BY DISTILLATION. ASTM D Standard Test Method for Water in Petroleum Products and Bituminous Materials by Distillation.
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This instrument adopts double-unit structure. Coulometric KF In coulometric KF, the iodine needed by the KF reaction is not present in the KF reagent, but is instead generated electrochemically in situ from iodide at the anode of the generator electrode, a component of the coulometric titration cell Figure 2. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
If there is a persistent ring of water in the condenser tube, carefully increase the rate of distillation or cut off the condenser water for a few minutes. A number of lubricating oil additives are reactive and are known to interfere with direct KF titration.
Petroleum distillate Volatile spirits FIG. Since its invention by German petroleum chemist Dr.
Analyzing Water in Oil
Procedure NOTE 4—The precision of this test method will be affected by water droplets adhering to surfaces in the apparatus and therefore not settling into the water trap to be measured. NOTE 3—Instead of standardizing on a particular apparatus speci? Summary of Test Method 4.
Temperature is adjusted by a temperature control dial. Methods of test for petroleum and its products. Awtm stills and traps should be chosen to cover the range of materials and water contents expected. The end-point determination in KF titration occurs by means of bivoltametric indication. As a guideline, sample sizes shown in Table 1 are recommended for volumetric and coulometric KF, respectively. Current Issue Archive Advertise. Fundamentals of Volumetric Karl Fischer Titration.
The technique also offers other substantial advantages over more conventional hot plate crackle test and distillation methods, and it has been incorporated into numerous ASTM standards.
When complete, discard the contents of the trap and add the volume of water as speci? Modern Instrumental Methods and Techniques. Some of the modes by which water exists in lubricating oils can lead to catastrophic equipment failure.
The still, trap, and condenser may be connected by any dd95 method that produces a leakproof joint. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Relevancy Transaction Level Response Rate. Water Content Oil Testing Equipment.
Astm D95, Astm D95 Suppliers and Manufacturers at
In fact, we are the only supplier who can provide both the main host and accessories in China. The heating element is made of glass fibre which minimises damage to the flask in case of a slight impact between flask and heater. For those oil samples which fail to adequately dissolve even when using KF reagents formulated with organic co-solvents, or those that are suspected of containing interfering compounds, an indirect Atm analysis using an oil evaporator is recommended, as described below.
You can ensure product safety by selecting from certified suppliers, including 42 with Other, 24 with ISO certification. These include corrosion, erosion, etching and hydrogen embrittlement. Recommended Sample Sizes for KF Analysis Sample Size Selection For both direct and d995 KF methods, sample size selection is critical for minimizing errors associated with sample weighing, transfer and injection.
Only representative samples obtained as speci? Coulometric KF is most accurate in the range of 1 ppm to 5 percent water.
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. If the metal still is used, start heating with the ring burner about 76 mm 3 in. The precision when using the 2-mL trap or a 5—mL trap has not been established.
Toggle navigation Toggle search. Once all the water has reacted with the iodine, trace quantities of free iodine appear in the titration cell, causing a drop in voltage necessary to keep the polarization current constant, which in turn signals v95 end-point of the titration.
Distillation ml Flask Heater Part Number The Seta Distillation Flask Heater is a regulated heating mantel which has the capacity to accommodate a ml flask. Aatm two types of volumetric KF differ in the exact composition of titrant and solvent. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Last previous edition approved in as D95— NOTE 1—Volatile water-soluble material, if present, may be measured as water. High water content of lubricating oils negatively impacts the operation and longevity of the oils and the mechanical equipment components being lubricated. Testing mositure of petroleum asphalt, coal tar or asphalt emulsion, etc.