6. Apparatus
6.1 In the development of this test method, it was noted that variations, particularly with respect to glassware and filter media, can affect the test result significantly.
6.2 When the user of this test method uses an alternate membrane filter, it is incumbent upon them to establish that the alternate filter will give equal results.
6.3 Precision data were established using the apparatus listed and a 0.8 µm filter pore size.
6.4 Membrane Filter.
6.5 Borosilicate Filter Holder.
6.6 Borosilicate Filtering Flask.
6.7 Forceps (plain flat tips - not serrated),
6.8 Wash Bottle equipped with 0.8-µm membranes.
6.9 Analytical Balance, capable of weighing with an accuracy of +/-0.1 mg.
6.10 Vacuum Source, capable of maintaining a vacuum of 255 +/- 50 mm Hg.
6.11 Oven, capable of maintaining 90 +/- 5°C.
6.12 Oven Thermometer - ASTM Thermometer 1C.
6.13 Aluminum Foil Weighing Dish, about 60 mm in diameter.
6.14 Desiccator, with calcium chloride.
6.15 Mechanical Paint Shaker, three-dimensional.
6.16 Volumetric Flask, 100-mL with ground-glass or TFE-fluorocarbon stopper.
6.17 Ionizing Unit - Insert under or next to balance pan.
7. Reagent
7.1 Pentane, reagent grade (Warning - See Note 2) conforming to the following requirements:
NOTE 2 - Warning: Extremely flammable. Vapors can cause flash fire.