BS EN 10136:2019 pdf download.Steels and cast irons – Determination of nickel content – Flame atomic absorption spectrometric method (FAAS)
1 Scope
This document specifies a flame atomic absorption spectrometric method (FAAS) for the determination of nickel content in steels and cast irons.
The method is applicable to nickel contents between 0,004 % (weight percent) and 2,0 % (weight percent).
The method can be adapted to lower or higher nickel contents by changing the test portion or the dilution process, provided the criteria in 6.2.2 and 6.2.3 are still met.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN ISO 648, Laboratory glassware一Single-volume pipettes (ISO 648)
EN ISO 1042, Laboratory glassware一One-mark volumetric flasks (ISO 1042)
EN ISO 14284, Steel and iron- Sampling and preparation of samples for the determination of chemical composition (ISO 14284)
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
一IEC Electropedia: available at http:/ /www.electropedia.org/
一ISO Online browsing platform: available at http:/ /www.iso.org/obp
4 Principle
Dissolution of a test portion in a mixture of appropriate acids and fuming with perchloric acid.
Nebulisation of the test solution into an air/acetylene flame of an atomic absorption spectrometer.
Spectrometric measurement of the atomic absorption of the 232,0 nm or 352,5 nm spectral line emitted by a nickel hollow-cathode lamp.
NOTE Other suitable radiation sources can also be used, provided the criteria in 6.2.2 and 6.2.3 are still met.
5 Reagents
During the analysis, use only reagents of recognized analytical grade and only distilled water or water of equivalent purity.
The following concentrations and amounts can be modified, provided the changes are taken into account in 8.3 and Clause 9.
5.1 Pure iron, with nickel content < 0,000 5 %.
5.4 Nickel standard solution, 1 g/l.
Weigh (0,500+0,001) g of nickel (Ni 2 99,9 %] and transfer into a heat-resistant glassware of suitable size. Add 25 ml of nitric acid (ρ20= 1,40 g/ml approximately), diluted 1 + 1. Cover with a watch glass,and, if necessary, heat gently to assist dissolution. When dissolution is complete, boil to remove nitrogen oxides. Allow to cool to room temperature and transfer the solution quantitatively into a 500 ml one-mark volumetric flask. Dilute to the mark with water and mix.
BS EN 10136:2019 pdf download
