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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Thereafter, each major subdivision that is, 2. In cases of material with a low-water content when large samples must be used, a solvent-carrier liquid volume in excess of mL may be necessary.

Distillation methods, such as ASTM D95 and D provide better quantitative data in the range of approximately ppm to 25 percent, but require large sample sizes and involve long analysis times, typically 60 to minutes. Fundamentals of Volumetric Karl Fischer Titration. Reactivity Certain compounds in the oil will undergo interfering side reactions either with methanol or iodine components of KF reagents. Rinse the material adhering to the cylinder with one mL and two mL portions of the solvent-carrier liquid see Section 6 and Table 1.

Additionally, because the oil evaporator contains a miniaturized distillation set-up, only small sample 0. Toggle navigation Toggle search. The d5 has reasonable structure, beautiful shape and safe and reliable to operate. Water Content Oil Testing Equipment. This instrument asm double-unit structure. In two-component KF, the titrant contains only an alcoholic solution of iodine, while the solvent contains the other ingredients needed for the reaction. Circulate cold water through the jacket of the condenser.

Permission rights to photocopy the standard may also be secured from the ASTM website www. 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 KF analysis using an oil evaporator is recommended, as described below.


ASTM D95 Standard

For bituminous emulsions refer to Test Method D Visual indication is reliable for quantifying water content only in the free state, while the hot plate crackle test can be used to detect free and emulsified water.

Insert a loose cotton plug in the top of the condenser to prevent condensation of atmospheric moisture inside it. v95

Originally approved in A number of lubricating oil additives are reactive and are known to interfere with direct KF titration. Additionally, water has been known to cause certain oil additives to precipitate out, as well as to chemically attack some additives.

Current edition approved May 1, The distillation component of the indirect titration method adtm that the hard-to-dissolve oil samples, or those containing potentially interfering compounds, are not introduced to the titration cell, while the KF titration component of the method accurately quantifies the water content of the azeotropic vapor carried into the titration cell by the dry gas.

Understanding Oil’s Saturation Point.

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The two types of volumetric KF differ in the exact composition of titrant and solvent. Some of the modes by which water exists in lubricating oils can lead to catastrophic equipment failure. A gas ring burner with ports on the inside circumference shall be used with the metal still. Percent may be determined by mass or by volume.

Key Components of a Modern Volumetric KF Titrator Coulometric KF In coulometric KF, ast, 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 asfm titration cell Figure 2. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.


We have 12 months warranty, if it broken during transport, we can change a new one for you. Testing mositure of petroleum asphalt, coal tar or asphalt emulsion, etc. On assembly, care shall be taken to prevent the joints from freezing or sticking. 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.

Preferred connections are ground joints for glass and O-rings for metal to glass. Asphalt moisture is water quantity of the asphalt sample, expressed aastm quality percentage. No further reproductions authorized. The end-point determination in KF titration occurs by means of bivoltametric indication.

Sample Order Paid samples. Karl Fischer inKarl Fischer KF analysis has progressed from an esoteric laboratory procedure to a widely accepted instrumental method routinely d995 for water determination in the petrochemical industry.

A heater power indicator will illuminate when power is applied to the heater element. As a guideline, sample sizes shown in Table 1 are recommended for volumetric and coulometric KF, respectively. When complete, discard the contents of the trap and add the volume of water as speci? The KF method does sstm suffer from the same issues and limitations associated with the other techniques described above, and a number of recent advances in titrator instrumentation and reagent formulations have further improved the accuracy and reproducibility of KF analyses.