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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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, ...
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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)1. Scope1.1 This test method covers the determination of the melting point (cooling curve) of petroleum wax. It is unsuitable for waxes of the petrolatum group, microcrystalline waxes, or blends of such waxes with paraffin ...
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ASTM D1018 standard test method for hydrogen in petroleum fractions
ASTM D1018 standard test method for hydrogen in petroleum fractions10. Quality Control10.1 Confirm the performance of the test procedure by analyzing a QC sample (see 6.6).10.1.1 When QC/Quality Assurance (QA) protocols are already established in the testing facility, these may be used to confirm the ...
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ASTM D1018 standard test method for hydrogen in petroleum fractions
ASTM D1018 standard test method for hydrogen in petroleum fractions8. Procedure8.1 Connect the charged absorbers to each other and to the chimney delivery tube as shown in the complete assembly of the apparatus in Fig. 2. Attach the U-tube containing anhydrous calcium sulfate to the exit end of the second ...
