By Clive Washington
Contemporary significant advances in particle measurement research, rather in regards to its program within the pharmaceutical and similar industries, offers justification for this name. it's a booklet for technicians and senior technicians, undertaking and improvement managers, and formula improvement scientists in quite a lot of industries, pharmaceutics and chemical processing particularly. the writer, whose examine pursuits have revolved round PSA for a few years, discusses the newest advances with details at the collection of apparatus and skillability in operation. in addition to supplying a extensive creation to PSA, he describes methodologies and compares their benefits and downsides.
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Extra resources for Particle Size Analysis In Pharmaceutics And Other Industries: Theory And Practice
This may pose some significant problems. The powder normally consists of primary particles which may be agglomerated into masses; the usual requirement is to obtain the size distribution of the primary particles. Studying agglomerated masses can be extremely difficult, since they will tend to disintegrate in an indeterminate manner under certain conditions. The dispersion of the sample consists of a number of steps: 1) Wetting of the sample by the solvent 2) Disintegration of the agglomerates to a uniform suspension of primary particles 3) Stabilization of the suspension to ensure that agglomerates do not re-form.
Sampling spears can suffer from a number of disadvantages; they can break fragile particles, and can oversample fine materials, which may sift in through the coarser particles. 2. They do at least have the advantage that it is possible to obtain several samples from different parts of the batch, so that segregation within the container will provide less bias. Since none of these methods are completely satisfactory, it may be preferable to wait until the container is emptied into the plant, and a number of samples can be taken during this process at different times so that the whole container is sampled.
J. Pharm. Pharmacol. 15 Suppl. 56T. H. (1966). Planseeber Pulvermetall. 14 74–84. H. (1977). Characterization of the surface area of a fine-particle profile by its fractal dimension. J. (ed), Proc. conf. particle size analysis, Salford; Heyden, London, 250–262. H. (1986). Powder Technology 46 245–254. H. (1989). A random walk through fractal dimensions. VCH publishers (UK) Ltd, Cambridge. B. (1980). The fractal geometry of nature. J. and Warburton B. (1984). J. Pharm. Pharmacol. 36 73–6. G. D. (1977).