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EP Chapter 2.9.15 and tap density tester
European Pharmacopoeia EP Chapter 2.9.15 Apparent Volume, it is about tap density tester
The test for apparent volume is intended to determine under defined conditions the apparent volumes, before and after settling, the ability to settle and the apparent densities of divided solids (for example, powders, granules).
EP Chapter 2.9.15 and tap density tester
APPARATUS
The apparatus (see Figure 2.9.15.-1) consists of the following:
— a settling apparatus capable of producing in 1 min 250 ± 15 taps from a height of 3 ± 0.2 mm. The support for the graduated cylinder, with its holder, has a mass of 450 ± 5 g;
— a 250 ml graduated cylinder (2 ml intervals) with a mass of 220 ± 40 g.
METHOD
Into the dry cylinder, introduce without compacting 100.0 g (m g) of the substance to be examined. If this is not possible,
select a test sample with an apparent volume between 50 ml and 250 ml and specify the mass in the expression of results.
Secure the cylinder in its holder. Read the unsettled apparent volume V0 to the nearest millilitre. Carry out 10, 500 and
1250 taps and read the corresponding volumes V10, V500 and V1250, to the nearest millilitre. If the difference between V500
and V1250 is greater than 2 ml, carry out another 1250 taps.
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