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Steps towards numerical verification of the terahertz in-line measurement of tablet mixing by means of discrete element modelling

  • Hungyen Lin*
  • , Chunlei Pei
  • , Daniel Markl
  • , Yaochun Shen
  • , James A. Elliott
  • , J. Axel Zeitler
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

In recent years, terahertz in-line sensing has been used to monitor the film coating thickness of individual pharmaceutical tablets during the coating process. In the previous work, the in-line measurements were verified against off-line measurements of samples from the same population. Here, we report on our recent progress to further verify the validity of the terahertz in-line measurement modality using discrete element modelling for an artificial lab-scale tablet mixing process inside a tablet pan coater. By coupling discrete modelling with a ray-tracing method, it is then possible to estimate the cumulative measurements taken, which in turn can guide towards the fine-tuning of the selection criteria as part of measurement analysis.

Original languageEnglish
Pages (from-to)1775-1779
Number of pages5
JournalIET Microwaves, Antennas and Propagation
Volume12
Issue number11
DOIs
Publication statusPublished - 12 Sept 2018

Funding

The authors would like to acknowledge the financial support from UK EPSRC Research grant nos. EP/L019787/1 and EP/L019922/1. HL also acknowledges support from EP/R019460/1 and the Joy Welch Educational Charitable Trust.

Keywords

  • optical coherence tomography
  • OCT
  • pharmaceutical film coatings
  • tablet mixing
  • tablet coating

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