ASTM E 1772 Standard Test Method for Particle Size Distribution of Chromatography Media by Electric Sensing Zone Technique
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ASTM E 1772 Document Information:
Title
Standard Test Method for Particle Size Distribution of Chromatography Media by Electric Sensing Zone Technique
ASTM International
Publication Date:
Nov 10, 1995
Scope:
1. Scope
1.1 This test method is valuable for the measurement of particle size
and covers determination of
the particle size distribution of chromatography media in the overall
size range of approximately 1
to 450 μm using the electric sensing zone (ESZ) apparatus. This
instrument uses an electric
current path of small dimensions that is modulated by individual
particle passage through an
aperture and produces individual pulses of amplitude proportional to
the particle volume (1).
1.2 The values stated in SI units are to be regarded as the standard.
1.3 This standard does not purport to address all of the safety
concerns, if any, associated with
its use. It is the responsibility of the user of this standard to
establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
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