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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Corresponding reduction of hydride to hydrogen takes place at the cathode. You f95 ensure product safety by selecting from certified suppliers, including 42 with Other, 24 with ISO certification.
ASTM D95 Standard
Heating efficiency is promoted greatly with good contact between the heating element and the glass vessel. The blank shall be determined to the nearest scale division and used to correct the volume of water in the trap in Section Coulometric KF is most accurate in the range of 1 ppm to 5 percent water.
A number of lubricating oil additives are reactive and are known to interfere with direct KF titration.
This standard has been approved for use by agencies of the Department of Defense. NOTE 1—Volatile water-soluble material, if present, may be measured as water. Provide laboratory construction program design guidelines. This instrument adopts double-unit ast. About product and suppliers: As a guideline, sample sizes shown in Table 1 are recommended for volumetric and coulometric KF, respectively.
Sample Order Paid samples. Vessels of, and mL nominal capacity have proved satisfactory. Petroleum distillate Volatile spirits FIG. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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. Percent may be aztm by mass or by volume. Since its invention by German petroleum chemist Dr.
Thereafter, each major subdivision that is, 2. Preferred connections are ground joints for glass and O-rings for metal to glass. Types of Titration Volumetric KF Volumetric KF proceeds in the conventional manner of a classic titration, in that the titrant containing iodine is added mechanically to the qstm containing the sample by the titrator’s burette Figure 1.
The values in parentheses are for information only. ASTM D95 distillation v95 portable transformer oil moisture analyzer.
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The heating element is made of glass fibre which ast, damage to the flask in case of a slight impact between flask and heater. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. However, neither of these methods can detect dissolved water or aatm detect trace levels of emulsified water.
This standard is subject to revision at any time by the responsible technical d5 and must be reviewed every? Asphalt moisture is water quantity of the asphalt sample, expressed by quality percentage. Understanding Oil’s Saturation Point. Water in oils can occur in dissolved, emulsified and free states. 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.
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.
The assembly of the apparatus is satisfactory only if the trap readings are within the tolerances speci? Eliminate these factors before repeating the veri? Typical assemblies are illustrated in Fig. 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.
The Seta Distillation Flask Heater is a regulated heating mantel which has the capacity to accommodate a ml flask.
When complete, discard the contents of the trap and add the volume of water as speci?
ASTM D95 – 10_百度文库
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Sample Size and Reproducibility As with any analytical technique, the sampling error in KF analysis is inversely proportional to the sample size. Modern Instrumental Methods and Techniques. With both types of volumetric KF, imidazole is the base used most frequently as a buffer to maintain optimal pH for the reaction. 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.
Circulate cold water through the jacket of the condenser.
Last previous edition approved in as D95— A number in parentheses indicates the year of last reapproval. KF analysis is a versatile and robust analytical tool for water content analysis in oil samples, and can detect water in any of three states commonly found in oils. 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.
D95 — 05 4. Best Ways to Test for Water in Oil. Finding the Source of Water Contamination in Astmm. Supplier Types Trade Assurance.
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.
The following reactions represent this two-step mechanism.