ISO 13319-1:2021 Determination of particle size distribution — Electrical sensing zone method —Part 1: Aperture/orifice tube method
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Determination of particle size distribution — Electrical sensing zone method —Part 1: Aperture/orifice tube method是ISO于2021-03发布的ISO标准，适用于全球范围。标准截图
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INTERNATIONAL STANDARD ISO 13319-1:2021(E)
Determination of particle size distribution — Electrical sensing zone method —
Part 1: Aperture/orifice tube method
1 Scope
This document specifies the measurement of the size distribution of particles dispersed in an electrolyte solution using the electrical sensing zone method. This can include biologics such as cells, but also industrial particles such as carbon, cement, ceramic powders, metal powders, pigments and polymer powders. The method measures pulse heights and their relationship to particle volumes or diameters, and is applicable over the range (implementation dependant) from approximately 0,5 μm tο above 1 mm. This document does not address the specific requirements of the measurement of specific materials.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso. org/o bp
— IEC Electropedia: available at http:// www .electropedia .org/ 3.1
dead time
time during which the electronics are not able to detect particles due to the signal processing of a previous pulse
3.2
aperture
small diameter hole through which suspension is drawn
3.3
sensing zone
volume of electrolyte solution within, and around, the aperture in which a particle is detected
3.4
analysis volume
volume of suspension that is analysed
3.5
size bin
size interval to distinguish particle size for size distribution measurement
ISO 13319-1:2021(E)
3.6
envelope size
external size of a particle as seen in a microscope
3.7
envelope volume
volume of the envelope given by the three-dimensional boundary of the particle to the surrounding medium
3.8
effective density
density of a porous particle where open pores are filled with liquid and closed pores are not (so included in the density)
4 Symbols
For the purposes of this document, the following symbols apply.
A amplitude of the most frequent pulse
p
A amplitude of the electrical pulse generated by an arbitrary particle
x
D aperture diameter
d certified mean diameter of the microspheres used for primary calibration
m
d mean diameter of the sieved fraction as determined using microscopy
micr
d mean diameter of the sieved fraction as determined using the ESZ instrument
ESZ
df degrees of freedom
d particle diameter at the lower boundary of a size interval or channel
L
d modal diameter of a certified particle size reference material
p
d reference diameter of the microspheres
ref
d particle diameter at the upper boundary of a size interval or channel
U
f response factor
resp
K calibration constant of diameter
d
K arbitrary calibration constant of diameter of any value to start the mass calibration procedure
da
m mass of sample
M mass balance, percentage of particles accounted for in a measurement in comparison to input b
particle mass
M mass of particles measured by the instrument
m
n number used to signify the maximum of an integral be it channel number [in Formula (D.1)] or number of repeat measurements [in Formulae (G.1) and (G.2)]
n counted particle number
c
N mean of a Poisson distribution, used to describe the temporal spread of counts within a size bin
c
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