Measurement of particle concentration is a ubiquitous requirement across a diverse range of applications. In many cases knowing just particle size is not enough, as sample concentration may also affect the performance of the product or the biological response to a drug delivery vector for example. In addition, there is increasing requirement to measure nanoparticle concentration which is being driven by the EU definition of a Nanomaterial. This definition stipulates that a sample containing 50% or more of its particles by a number distribution, with a size smaller than 100nm, may need to be identified as a nanomaterial and thus regulated as such.
There are a wide variety of applications in which the measurement of particle / nanoparticle concentration is critically important, including:
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