ASTM D5004 Standard Test Method for Real Density of Calcined Petroleum Coke by Xylene Displacement
7. Apparatus
7.1 Pycnometer, or specific gravity bottle, 50 mL, with a ground glass stopper with a capillary hole. Bottles with a large neck (12 to 13 mm outside diameter) are preferred.
7.2 Water Bath, controlled to a temperature of 25 +/- 0.1°C.
NOTE 2 - This test method is written to be performed at 25 +/- 0.1°C; however, some laboratories may not have the provisions to perform the test at this temperature. It is permissible to perform the test procedure at any temperature between 20 and 40°C providing that the water bath is controlled at +/- 0.1°C of the chosen temperature and the pycnometers are calibrated at the same temperature that is used to determine the real density of the petroleum coke sample. This is possible due to the fact that the real density of calcined petroleum coke is not affected by temperature changes over a limited temperature range.
7.3 Analytical Balance, accurate to +/- 0.1 mg.
7.4 Vacuum Desiccator, with guard, connected to a vacuum source capable of lowering pressure to 75 mm of Hg (10 kPa).
7.5 Desiccator, with drying agent. Anhydrous calcium sulphate is satisfactory.
7.6 Drying Oven, preferably a vacuum oven, for temperature to 120°C.
7.7 Lead Weights, for the pycnometers, to prevent tipping over in the water bath. These can be made by coiling solid wire solder.
7.8 Wire Sieve, 75 µm (No. 200 mesh), meeting Specification E 11.
8. Reagents
8.1 Purity of Water - References to distilled water shall be understood to mean reagent water as defined by Type III of Specification D1193.
8.2 Analytical reagent grade solvents are not required but can be used. The technical grade of each of the following is satisfactory:
8.2.1 Acetone, Xylene, and Ethyl Alcohol.
NOTE 3 - Warning: See 6.1.2
