Determination of particle size distribution. Single particle light interaction methods. Light extinction liquid-borne particle counter
19.120 - Particle size analysis. Sieving
Reemplaza a: BS ISO 21501-3:2007
This document describes a calibration and verification method
for a light extinction liquid-borne particle counter (LELPC), which
is used to measure the size and particle number concentration of
particles suspended in liquid. The light extinction method
described in this document is based on single particle
measurements. The typical size range of particles measured by this
method is between 1 µm and 100 µm in particle size.
The method is applicable to instruments used for the evaluation
of the cleanliness of pharmaceutical products (e.g. injections,
water for injections, infusions), as well as the measurement of
number and size distribution of particles in various liquids.
The following are within the scope of this document:
size setting error;
maximum particle number concentration;
sampling flow rate error;
sampling time error;
sampling volume error;
reporting results from test and calibration.
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