Abstract：
:The mechanical properties of a drug tablet can affect its performance (e.g., dissolution profile and its physical robustness. An ultrasonic system for real-time in-die tablet mechanical property monitoring during compaction has been demonstrated. The reported set-up is a proof of concept compaction monitoring system which includes an ultrasonic transducer mounted inside the upper punch of the compaction apparatus. This upper punch is utilized to acquire ultrasonic pressure wave phase velocity waveforms and extract the time-of-flight of pressure waves travelling within the compact at a number of compaction force levels during compaction. The reflection coefficients for the waves reflecting from punch tip-powder bed interface are extracted from the acquired waveforms. The reflection coefficient decreases with an increase in compaction force, indicating solidification. The data acquisition methods give an average apparent Young's moduli in the range of 8-20 GPa extracted during the compaction and release/decompression phases in real-time. A monitoring system employing such methods is capable of determining material properties and the integrity of the tablet during compaction. As compared to the millisecond time-scale dwell time of a typical commercial compaction press, the micro-second pulse duration and ToF of an acoustic pulse are sufficiently fast for real-time monitoring.
journal_name
Int J Pharmjournal_title
International journal of pharmaceuticsauthors
Stephens JD,Kowalczyk BR,Hancock BC,Kaul G,Cetinkaya Cdoi
10.1016/j.ijpharm.2012.09.014subject
Has Abstractpub_date
2013-02-14 00:00:00pages
20-6issue
1-2eissn
0378-5173issn
1873-3476pii
S0378-5173(12)00879-4journal_volume
442pub_type
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