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Specific Gravity - Pulp

Specific gravity is measured using the relative volumes of solids to water and air in a given volume.  This can be used on solids that pass the 4.75 mm (No. 4) sieve.  The measurement is done using a pycnometer (calibrated volumetric flask) following ASTM D854.

This test cannot be used for soil solids which can be altered by this method, contaminated with a substance that prohibits the use of this method, or for highly organic soil solids, such as fibrous matter, which floats in water.


Precision and bias are determined to judge the acceptability of the test results. QC is 12% for each batch of 50, 1 blank, 1 silica flour control, 4 sample duplicates.


Activation Laboratories Ltd. | 41 Bittern Street, Ancaster, Ontario, L9G 4V5, Canada | TF: +1.888.228.5227
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