OTHERS Flashcards
(32 cards)
Bisects
Martin’s diameter
Tangent
Feret’s diameter
Same areas as the particle
Projected area diameter
Measured from the bulk volume and the weight of the dry powder in a graduated cylinder
Bulk density
Ratio of the density of the powder and the true density
Relative density
Density of the material itself (exclusive of voids and pores)
True density
He displacement method
True density
Density of the material and intraparticle pores (exclusive of voids)
Granule density
Hg displacement
Granule density
Particle volume
Electric resistance
Coulter counter
Particle volume
Light blockade
HIAC/Royco instrument
Fisher subsieve sizer measures
Surface area
Andreasen apparatus measures
Sedimentation rate
Law of size reduction
Square root of diameter of particle produced
Bond’s law
Law of size reduction
E-alpha ratio of change in size
Kick’s law
Law of size reduction
E-alpha increase in surface area
Rittinger’s law
Depend on the total contribution of the atoms in the molecule or on the sum of the properties of the constituents in a solution
Additive properties
Depend on the arrangement and to a lesser extent on the number and kind of atoms within a molecule
Constitutive properties
Depend mainly on the number of particles in a solution
Colligative properties
Addition of a tonicity adjusting agent
Class I
Cryoscopic method
E-value
Addition of water and dilution with
buffered isotonic solution
Class II
Sprowl’s
Vincent Method
Formula for Sprowl’s method
0.3 grams constant x (E-value) 8 x 111.1
Formula for White vincent method
Weigh x E value x 111.1
USP method for adjusting tonicity
White Vincent method
Weigh x E value x 111.1