Friability Testing

Friability Testing

Friability Testing

The friability tester has now become an accepted standard throughout the pharmaceutical industry for determining the resistance of uncoated tablets to the abrasion and shock experienced in manufacturing, packing and shipping operations. 

Friability Testers FR and FRV Series are designed in accordance with the specifications as laid down in Eur. Ph. Chapter 2.9.7 and USP Chapter <1216>. The standard FR Series operates at a constant speed of 25 rpm +/- 1. It is available in two variants, with either one (Model FR 1000) or two (Model FR 2000) test drums. Similar in construction to the fixed speed FR Series, the Friability Series FRV differs only in having variable speed between 20 and 60 rpm. 

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TABLET FRIABILITY TESTERS

PHARMACOPOEIA COMPLIANCE AND VALIDATION

In order to meet your individual requirements, Copley provide a three tier approach to regulatory compliance and validation.

  • Each Friability Tester is checked by our quality control department prior to despatch and supplied as standard with a Certificate of Compliance documenting the test protocol used and certifying conformity with the appropriate Pharmacopoeia.
  • In addition to this general Certificate of Compliance, some of you have asked us for specific certification on certain critical components, for example, the Friability Drum. If you require this additional service, please refer to the appropriate ordering information on Numbering and Certification. This service includes the numbering of the individual component concerned and the provision of a detailed certificate indicating the actual measurements relating to that component and the metrology equipment (and its traceability) used in measuring them.
  • Finally, all systems are available for our engineers to come on-site to perform fully documented IQ/OQ.

DESIGN AND CONSTRUCTION

Designed in accordance with the specifications as laid down in Eur. Ph. Chapter 2.9.7 and USP Chapter <1216>, the FR Series forms the basis of our range of friability testers for uncoated tablets. The standard FR Series operates at a constant speed of 25 rpm +/- 1. It is available in two variants, with either one (Model FR 1000) or two (Model FR 2000) test drums. Similar in construction to the fixed speed FR Series, the Friability Series FRV differs only in having variable speed between 20 and 60 rpm.

The speed is controlled via the membrane keypad in steps of 1 rpm. The variable speed allows the operator to subject the tablets under test to varying stresses and therefore determine an optimum for each type. As on the FR Series, the duration of the test can be selected in either revolutions of the drum (1 – 999,999) or time (up to 99 hours, 59 minutes, 59 seconds). During the test run, the nominal test duration and remaining test duration, in either revolutions or time, is indicated on the LCD screen, together with the selected speed.  The control of all models is  provided by a membrane keypad linked to a 4-line 20 character back-lit LCD screen.

DRUMS

The Friability Drum has been designed for testing the rolling and impact durability of tablets and has a single curved baffle which allows the tablets to be tested to rise and then drop through a distance of approx. 156 mm. Premature fracture or sign of wear at the edges indicates that such tablets may not withstand the
rigours of transportation. All Friability Drums are now fitted with an aperture such that it is no longer necessary to remove and open the Friability Drum in order
to load and remove the samples. At the start of the test, the drum automatically revolves until the  aperture(s) faces the operator so  that the tablets can be loaded. On
completion of the test, the drum  stops and then reverses automatically  emptying the contents of the drum   into the waiting collection tray(s).

All Friability Drums are completely interchangeable, i.e. they will fit  either side of the tester. Abrasion Drums for carrying out tests into attrition are also available as an optional extra. The Abrasion Drum comprises of a drum 20 cm diameter with a series of baffles, which carry the tablets to a predetermined height before sliding off and reproduces the action of the tablets rubbing against each other during  transport. All testers can be equipped with a choice of either USP Friability Drums
and/or Abrasion Drums. Dual drum units can, for example, be fitted with one Friability and one Abrasion Drum, thus allowing comparisons to be made between the two parameters under identical test conditions.

OPERATION

Considerable attention was paid to the design of the FR and FRV series to ensure that the number of actions necessary to perform a test are kept to a minimum. Consequently, once the method (number of revolutions or time) has been selected and the test duration set, it is only necessary to press the START key to initiate the test.  The standard test procedure is to take a sample of 10 tablets (a sample equivalent to 6.5 grams should be taken if the tablets weigh less than 650 mg), the weight of which has already been determined (W1). The tablets should be de-dusted prior to weighing. The tablets are then placed into  the test drum and allowed to rotate 100 times. The tablets are then reweighed (W2), having first removed any accumulated dust, and the results  calculated in terms of % weight loss utilising the formula (W1-W2) x 100 divided by W1. In general, a maximum weight loss of not more than 1% is acceptable for most tablets. If necessary, repeat the test twice more
basing the result on the mean of the three tests.

Dimensions (mm):
FR 1000 / FRV 1000 = 290 x 360 x 350 mm (w x d x h)
FR 2000 / FRV 2000 = 342 x 360 x 350 mm (w x d x h)

 

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