BS EN ISO 4945:2018
$102.76
Steel. Determination of nitrogen. Spectrophotometric method
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 22 |
This document specifies a spectrophotometric method for the determination of nitrogen in steel.
The method is applicable to the determination of nitrogen mass fraction between 0,000 6 % and 0,050 % in low alloy steels and between 0,010 % and 0,050 % in high alloy steels.
The method does not apply to samples containing silicon nitrides or having silicon contents higher than 0,6 %.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 4 | European foreword |
| 6 | Foreword |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions 4 Principle |
| 8 | 5 Reagents |
| 9 | 6 Apparatus 7 Sampling 8 Procedure 8.1 Test portion |
| 10 | 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) |
| 11 | 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 |
| 12 | 8.4.2 Spectrophotometric measurements 8.4.3 Plotting the calibration curve 9 Expression of results 9.1 Method of calculation |
| 13 | 9.2 Precision 10 Test report |
| 14 | Annex A (informative) Examples of distillation apparatus |
| 17 | Annex B (informative) Additional information on the international interlaboratory test |
| 20 | Annex C (informative) Graphical representation of precision data |
| 21 | Bibliography |
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BS EN ISO 4945:2018 – TC:2020 Edition
Tracked Changes. Steel. Determination of nitrogen. Spectrophotometric method Published By Publication Date Number of Pages…
