Technical data

107
ERWEKA GTA 120
ERWEKA friability tester type GTA 120 de-
signed for any form of tablets, granules and
pellets according to the Pharm. Eur. Excellent
reproducibility is possible due to the precise
constancy of the input energy and due to the
irrelevance of the tackiness of the test material
inside the glass bottle (test station).
The single glass bottle is fixed to a holder which
is connected to an arm performing the shaking
(oscillation) procedure as described in the
Pharm.Eur. An acrylic glass lid covers the test-
ing area. The shaking intensity and duration are
manually pre-selected.
 Shaking frequency 0-400 strokes/min.
 Run time 0-9999 seconds.
 Shaking angle 42°.
 Test station complies with the regulations
 Security acrylic glass cover over the test
station
100–240V/50Hz and 60Hz 12-311-0001
 Additional Test-Bottle 81-311-0001
 IQ/OQ/PQ document for GTA 120 friability
tester 66-311-9999
Operation procedure according Pharm.
Eur. Vol.17, No.3, July 2005:
a.) Before and after measurement the grau-
les/pellets have to be sieved through a 355
sieve to remove any fines.
b.) 10.00 g of the sieved granules/pellets have
to be filled into the glass bottle, then the
bottle is capped and fixed to the holder.
c.) The test run has to be performed as men-
tioned before.
d.) The bottle is removed, opened and the
granules/pellets are again sieved through a
355 sieve in order to remove the fines.
e.) The weight of the sieved granules/pellets is
measured again
f.) The friability loss is calculated: m1 - m2
x100 m1
g.) This procedure (a - f) has to be repeated 3
times, then the average friability loss is
calculated.