Bulk characterization of pharmaceutical powders by low-pressure compression II: effect of method settings and particle size
Research output: Contribution to journal › Journal article › Research › peer-review
The aim of the present study was to investigate the effect of punch and die diameter, sample size, compression speed, and particle size on two low-pressure compression-derived parameters; the compressed density and the Walker w parameter. The excellent repeatability of the low-pressure compression method allowed small effects of variations in punch and die diameter and sample size to be demonstrated on a high significance level. Changing the compression speed, however, did not cause a significant effect in the compressed density, whereas a decrease in w was seen. The effect of particle size was studied by compressing and tapping different grades of calcium carbonate, lactose, and microcrystalline cellulose. The low-pressure compression-derived parameters were compared to tapped densities and to Compressibility Indexes obtained by tapping volumetry. Even though the relationship between particle size and the low-pressure compression-derived parameters appeared to be more complicated, a similar trend was observed. It was concluded that the low-pressure compression method provides a useful alternative to the more sample-consuming methods providing flow-related information.
Original language | English |
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Journal | Pharmaceutical Development and Technology |
Volume | 11 |
Issue number | 2 |
Pages (from-to) | 235-241 |
Number of pages | 7 |
ISSN | 1083-7450 |
DOIs | |
Publication status | Published - 1 May 2006 |
ID: 63007239