BSI PD CEN ISO/TS 21362:2021
$189.07
Nanotechnologies. Analysis of nano-objects using asymmetrical-flow and centrifugal field-flow fractionation
| Published By | Publication Date | Number of Pages |
| BSI | 2021 | 48 |
This document identifies parameters and conditions, as part of an integrated measurement system, necessary to develop and validate methods for the application of asymmetrical-flow and centrifugal field-flow fractionation to the analysis of nano-objects and their aggregates and agglomerates dispersed in aqueous media. In addition to constituent fractionation, analysis can include size, size distribution, concentration and material identification using one or more suitable detectors. General guidelines and procedures are provided for application, and minimal reporting requirements necessary to reproduce a method and to convey critical aspects are specified.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | European foreword Endorsement notice |
| 7 | Foreword |
| 8 | Introduction |
| 10 | 1 Scope 2 Normative references 3 Terms and definitions |
| 16 | 4 Symbols and abbreviated terms |
| 17 | 5 Principles of operation 5.1 Field-flow fractionation (General) |
| 19 | 5.2 Specific applications by applied field 5.2.1 Flow field |
| 20 | 5.2.2 Centrifugal field |
| 22 | 6 Method development for AF4 6.1 General |
| 23 | 6.2 Sample specifications 6.3 Mobile phase specifications |
| 24 | 6.4 Fractionation 6.4.1 Channel and membrane selection |
| 26 | 6.4.2 Injection and relaxation |
| 27 | 6.4.3 Optimizing flow conditions 6.4.4 Elution programme |
| 28 | 6.4.5 Using FFF theory to select initial flow settings 7 Method development for CF3 7.1 General |
| 29 | 7.2 Choice of mobile phase 7.3 Field strength selection 7.4 Field decay programme |
| 30 | 7.5 Channel flow rate selection 7.6 Calculation of the relaxation time 7.7 Calculation of sample injection delay 8 Analysis of nano-objects 8.1 General |
| 31 | 8.2 Online size analysis |
| 32 | 8.3 Online concentration analysis 8.3.1 General 8.3.2 Mass-based methods |
| 33 | 8.3.3 Number-based methods |
| 34 | 8.4 Online material identification or composition |
| 35 | 8.5 Off-line analysis (Fraction collection) 9 Qualification, performance criteria and measurement uncertainty 9.1 System qualification and quality control 9.1.1 Basic system qualification |
| 36 | 9.1.2 Focusing performance |
| 37 | 9.1.3 Flow rate of the carrier liquid 9.1.4 Separation field 9.2 Method performance criteria 9.2.1 Recovery |
| 38 | 9.2.2 Selectivity 9.2.3 Retention 9.2.4 Resolution 9.3 Method precision and measurement uncertainty |
| 39 | 10 General procedures for measurement of samples 10.1 General 10.2 Calibration of retention time for online size analysis 10.2.1 Calibration of the AF4 channel |
| 40 | 10.2.2 Calibration of AF4 retention time for online size measurements 10.3 AF4 general measurement procedure |
| 41 | 10.4 CF3 general measurement procedure |
| 42 | 11 Test report 11.1 General 11.2 Apparatus and measurement parameters 11.2.1 AF4 recording/reporting specifications |
| 43 | 11.2.2 CF3 recording/reporting specifications 11.3 Reporting test results |
| 44 | Bibliography |
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