ASTM D95 PDF
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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Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
The gas ring burner shall be of such dimensions that it may be moved up ast, down the vessel when testing materials that are likely to foam or solidify in the still. If the metal still is used, start heating with the ring burner about 76 mm 3 in. Furthermore, neither visual indication nor the hot plate test can be used to reliably quantify the water present.
Water in oils can occur in dissolved, emulsified and free states. Insert a loose cotton plug in the top of the condenser to prevent condensation of atmospheric moisture inside it. The condenser tube and trap must be chemically clean to ensure free drainage of water into the bottom of the trap.
Dislodge any drops of water adhering to the sides of the trap with a glass or polytetra? Water Content Oil Testing Equipment. 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.
Read the volume of the water in the trap to the nearest scale division. Last previous edition approved in as D95— 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. A gas ring burner with ports on the inside circumference shall be used with the metal still. Precision and Bias However, due to solubility and reactivity issues described above, analysts often drastically reduce sample size, which tends to reduce the reproducibility of test results.
D95 — 05 4. Reactivity Certain compounds in the oil will undergo interfering side reactions either with methanol or iodine components of KF reagents.
Analyzing Water in Oil
When complete, discard the contents of the trap and add the volume of water as speci? More frequent cleaning is recommended if the nature of atsm being run causes persistent contamination. Percent may be determined by mass or by volume. Volumetric or coulometric KF methods, utilizing either direct titration or the oil evaporator technique, can be used to quantify water in oil samples from trace amounts to percent. The precision when using the 2-mL trap d5 a 5—mL trap has not been established.
Copyright Stanhope—Seta Limited Techniques for Successful KF of Oil Samples Direct Titration Sample solubility issues may be overcome by using co-solvents such as chloroform, toluene or xylene to increase the solvent capacity of conventional KF reagents in the titration cell.
V95 two-component KF, the titrant contains only an alcoholic solution of iodine, while the solvent contains the other ingredients needed for the reaction. The procedure involves adding the oil sample to the solvent present in the evaporation chamber where it dissolves in the solvent, and in the process forms a binary azeotrope between the solvent and the sample’s water content.
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The Best Astk Better: Create your own user feedback survey. Coulometric KF is most accurate in the range of 1 ppm to 5 percent water.
Provide laboratory construction program design guidelines. The distillation component of the indirect titration method ensures 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.
Testing mositure of petroleum asphalt, coal tar or asphalt emulsion, etc. In other words, the larger the ashm, the less error is introduced into the wstm by sample weighing, transfer and other handling. Summary of Test Method 9d5. 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. As a guideline, sample sizes shown in Table 1 are recommended for volumetric and coulometric KF, respectively.
Asphalt moisture is water quantity of the asphalt sample, expressed by quality percentage. Finding the Source of Water Contamination in Oil. The Seta Distillation Flask Heater is a regulated heating mantel which has the capacity to accommodate a ml flask. Heating efficiency is promoted greatly with good contact between the heating element and the glass vessel. Corresponding reduction of hydride to hydrogen takes place at the cathode.
ASTM D95 distillation method portable transformer oil moisture analyzer.
ASTM D95 Standard
Permission rights to photocopy the standard may also be secured from the ASTM website www. The subsequent oxidation of the alkylsulfite salt to an alkylsulfate salt by iodine consumes water in a 1: However, alcohols cannot be completely removed from KF reagents, because the presence of alcohol is required by the mechanism of the KF reaction.
The values in parentheses are for information only. Understanding Oil’s Saturation Point. Petroleum products and bituminous materials. High water content of lubricating oils negatively impacts the operation and longevity of the oils and the mechanical equipment components being lubricated.