BS EN ISO 4945:2018 – TC:2020 Edition
$134.27
Tracked Changes. Steel. Determination of nitrogen. Spectrophotometric method
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 49 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 29 | National foreword |
| 31 | European foreword |
| 33 | Foreword |
| 34 | 1 Scope 2 Normative references 3 Terms and definitions 4 Principle |
| 35 | 5 Reagents |
| 36 | 6 Apparatus 7 Sampling 8 Procedure 8.1 Test portion |
| 37 | 8.2 Blank test 8.3 Determination 8.3.1 Dissolution 8.3.2 Treatment of insoluble residue 8.3.3 Steam distillation (see Figure A.1, A.2 or A.3) |
| 38 | 8.3.4 Formation of the coloured complex 8.3.5 Spectrophotometric measurements 8.4 Establishment of the calibration curve 8.4.1 Preparation of the calibration solutions |
| 39 | 8.4.2 Spectrophotometric measurements 8.4.3 Plotting the calibration curve 9 Expression of results 9.1 Method of calculation |
| 40 | 9.2 Precision 10 Test report |
| 41 | Annex A (informative) Examples of distillation apparatus |
| 44 | Annex B (informative) Additional information on the international interlaboratory test |
| 47 | Annex C (informative) Graphical representation of precision data |
| 48 | Bibliography |
