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  • ASTM D156 for Saybolt color of petroleum products (Saybolt Chromometer method) ASTM D156 for Saybolt color of petroleum products (Saybolt Chromometer method)1. Scope1.1 This test method covers the determination of the color of refined oils such as undyed motor and aviation gasoline, jet propulsion fuels, naphthas and kerosine, and, in addition, petroleum waxes and pharmaceutical ...
  • ASTM D4739 for base number determination by potentiometric titration ASTM D4739 for base number determination by potentiometric titration13. Report13.1 Report the results as base number, and strong base number, Test Method D4739.14. Quality Control Checks14.1 confirm the performance of the test procedure by analyzing a quality control (QC) sample that is, if possible, ...
  • ASTM D4739 for base number determination by potentiometric titration ASTM D4739 for base number determination by potentiometric titration11. Procedure for Base Number and Strong Base Number11.1 Calculate the quantity of sample required for its expected base number as follows:A = 7/Ewhere:A = approximate mass of sample, g andE = expected base number.11.1.1 Take a maximum ...
  • ASTM D4739 for base number determination by potentiometric titration ASTM D4739 for base number determination by potentiometric titration8. Preparation of Electrode System8.1 Maintenance of Electrodes - Clean the glass electrode (Note 5) at frequent intervals (not less than once every week during continual use) by immersing in cold chromic acid cleaning solution (Warning ...
  • ASTM D4739 for base number determination by potentiometric titration ASTM D4739 for base number determination by potentiometric titration6. Apparatus6.1 Potentiometric Titrimeter, automatic or manual, with capability of adding fixed increments of titrant at fixed time intervals (see Annex A1).6.1.1 The titrimeter must automatically (or manually) control the rate of addition ...
  • ASTM D4739 for base number determination by potentiometric titration ASTM D4739 for base number determination by potentiometric titration4. Summary of Test Method4.1 The sample is dissolved in a mixture of toluene, propanol-2-ol (isopropyl alcohol), chloroform, and a small amount of water and titrated potentiometrically with alcoholic hydrochloric acid solution. The test ...
  • ASTM D4739 for base number determination by potentiometric titration ASTM D4739 for base number determination by potentiometric titration 1. Scope1.1 This test method covers a procedure for the determination of basic constituents in petroleum products and lubricants (Note 1). The test method resolves these constituents into groups having weak-base and strong-base ionization ...
  • ASTM D87 standard test method for melting point of petroleum wax (Cooling Curve) ASTM D87 standard test method for melting point of petroleum wax (Cooling Curve)9. Calculation and Report9.1 Average the first five consecutive thermometer readings of the identified plateau, which agree within 0.1°C (0.2°F). Correct this average for error in the thermometer scale where necessary.9.2 ...
  • ASTM D87 standard test method for melting point of petroleum wax (Cooling Curve) ASTM D87 standard test method for melting point of petroleum wax (Cooling Curve)6. Apparatus6.1 The necessary apparatus is described in Annex A1.7. Test Specimen7.1 Obtain a sample of wax representative of the shipment to be tested. From each test unit obtain a portion of wax weighing at least 25 g for ...
  • ASTM D87 standard test method for melting point of petroleum wax (Cooling Curve) ASTM D87 standard test method for melting point of petroleum wax (Cooling Curve)4. Summary of Test Method4.1 A specimen of molten wax in a test tube fitted with a thermometer is placed in an air bath, which in turn is surrounded by a water bath held at 16 to 28°C (60 to 80°F). As the molten wax cools, ...