prEN ISO 21362
(Main)Nanotechnologies - Analysis of nano-objects using asymmetrical flow and centrifugal field-flow fractionation (ISO/DIS 21362:2024)
Nanotechnologies - Analysis of nano-objects using asymmetrical flow and centrifugal field-flow fractionation (ISO/DIS 21362:2024)
Nanotechnologien - Analyse von Nanoobjekten mit Hilfe von Asymmetrischer-Fluss-Feldflussfraktionierung und zentrifugaler Feldflussfraktionierung (ISO/DIS 21362:2024)
Nanotechnologies - Analyse des nano-objets par fractionnement flux asymétrique et flux force centrifuge (ISO/DIS 21362:2024)
Nanotehnologije - Analiza nanoobjektov s frakcioniranjem asimetričnega in centrifugalnega pretoka skozi polje (ISO/DIS 21362:2024)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2024
Nanotehnologije - Analiza nanoobjektov s frakcioniranjem asimetričnega in
centrifugalnega pretoka skozi polje (ISO/DIS 21362:2024)
Nanotechnologies - Analysis of nano-objects using asymmetrical flow and centrifugal
field-flow fractionation (ISO/DIS 21362:2024)
Nanotechnologien - Analyse von Nanoobjekten mit Hilfe von Asymmetrischer-Fluss-
Feldflussfraktionierung und zentrifugaler Feldflussfraktionierung (ISO/DIS 21362:2024)
Nanotechnologies - Analyse des nano-objets par fractionnement flux asymétrique et flux
force centrifuge (ISO/DIS 21362:2024)
Ta slovenski standard je istoveten z: prEN ISO 21362
ICS:
07.120 Nanotehnologije Nanotechnologies
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 21362
ISO/TC 229
Nanotechnologies — Analysis of
Secretariat: BSI
nano-objects using asymmetrical
Voting begins on:
flow and centrifugal field-flow
2024-09-02
fractionation
Voting terminates on:
ICS: 07.120
2024-11-25
THIS DOCUMENT IS A DRAFT CIRCULATED
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Reference number
ISO/DIS 21362:2024(en)
DRAFT
ISO/DIS 21362:2024(en)
International
Standard
ISO/DIS 21362
ISO/TC 229
Nanotechnologies — Analysis of
Secretariat: BSI
nano-objects using asymmetrical
Voting begins on:
flow and centrifugal field-flow
fractionation
Voting terminates on:
ICS: 07.120
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
Member bodies are requested to consult relevant national interests in IEC/TC AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
113 before casting their ballot to the e-Balloting application.
PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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Published in Switzerland Reference number
ISO/DIS 21362:2024(en)
ii
ISO/DIS 21362:2024(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms. 7
5 Principles of operation . 9
5.1 Field-flow fractionation (General) .9
5.2 Specific applications by applied field.11
5.2.1 Flow field .11
5.2.2 Centrifugal field . 12
6 Method development for AF4. 14
6.1 General .14
6.2 Sample specifications . 15
6.3 Mobile phase specifications .16
6.4 Fractionation .16
6.4.1 Channel and membrane selection .16
6.4.2 Injection and relaxation .18
6.4.3 Optimizing flow conditions .19
6.4.4 Elution programme .19
6.4.5 Using FFF theory to select initial flow settings . 20
7 Method development for CF3 .21
7.1 General .21
7.2 Choice of mobile phase .21
7.3 Field strength selection .21
7.4 Field decay programme .21
7.5 Channel flow rate selection . 22
7.6 Calculation of the relaxation time . 22
7.7 Calculation of sample injection delay . 22
7.8 Using FFF theory to select initial settings . 22
8 Analysis of nano-objects .23
8.1 General . 23
8.2 Online size analysis . 23
8.3 Online concentration analysis .24
8.3.1 General .24
8.3.2 Mass-based methods . 25
8.3.3 Number-based methods . . 25
8.4 Online material identification or composition . 26
8.5 Off-line analysis (fraction collection) .27
8.6 Alternative and emerging methods .27
9 Qualification, performance criteria and measurement uncertainty .28
9.1 System qualification and quality control . 28
9.1.1 Basic system qualification . 28
9.1.2 Focusing performance . 29
9.1.3 Flow rate of the carrier liquid. 29
9.1.4 Separation field . 30
9.2 Method performance criteria . 30
9.2.1 Recovery . 30
9.2.2 Selectivity .31
9.2.3 Retention ratio .31
9.2.4 Resolution .31
iii
ISO/DIS 21362:2024(en)
9.3 Method precision and measurement uncertainty .31
10 General procedures for measurement of samples .32
10.1 Introduction .
...
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