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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Only representative samples obtained as speci? Relevancy Transaction Level Response Rate.
ASTM D95 – 10_百度文库
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. Modern Instrumental Methods and Techniques. Eliminate these factors before repeating the veri?
In coulometry, the quantity of iodine generated corresponding to the amount of water present is calculated by the titrator xstm the basis of current mA and time sec. However, due to solubility and reactivity issues described above, analysts often drastically reduce sample size, which tends to reduce the reproducibility of test results. Percent may be determined by mass or by volume.
Note; clamp, bosshead and glassware available separately See detailed specifications Available accessories Request a quotation More products in this d955. Dislodge any drops of water adhering to the sides of the trap with a glass or polytetra? Sample Order Paid samples.
Preferred connections are ground joints for glass and O-rings for metal to glass. 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.
In one-component KF, the titrant usually referred to as a CombiTitrant or a composite contains all the ingredients needed for the KF reaction, namely iodine, sulfur dioxide, base and a suitable alcohol, while the solvent is typically dry methanol. These include corrosion, erosion, etching and hydrogen embrittlement. Additionally, because the zstm evaporator contains a miniaturized distillation set-up, only small sample 0.
High water content of lubricating oils negatively impacts the operation and longevity of the oils and the mechanical equipment components being lubricated.
Originally approved in In fact, we are the only supplier who can provide both the main host and accessories in China. Recommended Sample Sizes for KF Analysis Sample Size Selection For both direct and indirect KF methods, sample size selection is critical for minimizing errors associated with sample weighing, transfer and injection.
Analyzing Water in Oil
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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. Circulate cold water through the jacket of the condenser. Understanding Oil’s Saturation Point. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
However, neither of atm methods can detect dissolved water or reproducibly detect trace levels of emulsified water. In two-component KF, the titrant contains only an alcoholic solution of iodine, while the solvent contains the other ingredients needed for the reaction.
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However, alcohols cannot be completely removed from KF reagents, because the presence of alcohol is required by the mechanism of the KF reaction. The end-point determination in KF titration occurs by means of bivoltametric indication.
Sample Size and Reproducibility As with any analytical technique, the sampling error in KF analysis is inversely proportional to the sample size. The condenser tube and trap must be chemically clean to ensure free drainage of water into the bottom of the trap.
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As a guideline, sample sizes shown asstm Table 1 are recommended for volumetric and coulometric KF, respectively. A number in parentheses indicates the year of last reapproval. We have 12 months warranty, if it broken during transport, we can change a new one for you.