BS 15605:2010 pdf download – Copper and copper alloys — Inductively coupled plasma optical emission spectrometry
1 Scope
This European Standard specifies six inductively coupled plasma emission spectrometry methods (A to F) for the determination of alloying elements and impurities in copper and copper alloys in the form of unwrought, wrought and cast products. A complementary method, for the analysis of Copper-tin-lead alloys, is described in Annex B (informative). The precision criteria concerning this method do not reach the suitable level, for all the elements specified (zinc and phosphorus, namely). These methods are applicable to the elements listed in Tables 1 to 6 within the composition ranges shown:
NOTE 1 The ranges specified for each method can be extended or adapted, for the determination of lower mass frac- tions.
NOTE 2 Other elements may be included. However such elements and their mass fractions should be carefully checked, taking into account interference, sensitivity, resolution and linearity criteria for each instrument and each wavelength.
2 Normative references The following referenced documents are indispensable for the application 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.
ISO 1 81 1 -1 , Copper and copper alloys — Selection and preparation of samples for chemical analysis — Part 1: Sampling of cast unwrought products
ISO 1 81 1 -2, Copper and copper alloys — Selection and preparation of samples for chemical analysis — Part 2: Sampling of wrought products and castings 3 Principle Dissolution of a test portion with hydrochloric and nitric acids. After suitable dilution and addition of an internal reference element, nebulization of the solution into an inductively coupled plasma emission spectrometer and measurement of the intensity of the emitted light, including that of the internal reference element.
4 Reagents During the analysis, use only reagents of recognised analytical grade and only distilled water or water of equivalent purity. The same reagents should be used for the preparation of calibration solutions and of sample solutions.
4.1 Hydrochloric acid, HCl (ρ = 1 ,1 9 g/ml)
4.2 Hydrochloric acid, solution 1 + 1
Add 500 ml of hydrochloric acid (4.1 ) to 500 ml of water.
4.3 Nitric acid, HNO 3 (ρ = 1 ,40 g/ml)
4.4 Nitric acid, solution 1 + 1
Add 500 ml of nitric acid (4.3) to 500 ml of water.
4.5 Hydrofluoric acid, HF (ρ = 1 ,1 3 g/ml)
4.6 Sulphuric acid, H 2 SO 4 (4,5 mol/l)
4.7 Electrolytic copper
4.8 Zinc granules of 99,999 % purity
4.9 Aluminium stock solution, 1 0 g/l Al
Weigh (5 ± 0,001 ) g of aluminium (Al ≥ 99,99 %) and transfer into a 600 ml beaker. Add 250 ml of hydrochloric acid solution (4.2) and cover with a watch glass. After cooling to room temperature, transfer the solution quan- titatively into a 500 ml one-mark volumetric flask, dilute to the mark with water and mix well. 1 ml of this solution contains 10 mg of Al.
4.10 Aluminium stock solution, 1 g/l Al Weigh (1 ± 0,001 ) g of aluminium (Al ≥ 99,99 %) and transfer into a 400 ml beaker. Add 50 ml of hydrochloric acid solution (4.2) and cover with a watch glass. After cooling to room temperature, transfer the solution quan- titatively into a 1 000 ml one-mark volumetric flask, dilute to the mark with water and mix well. 1 ml of this solution contains 1 mg of Al.
4.11 Antimony stock solution, 1 g/l Sb Weigh (0,5 ± 0,001 ) g of antimony (Sb ≥ 99,99 %) and transfer into a 250 ml beaker. Add 50 ml of hydrochlo- ric acid (4.1 ) and 25 ml of nitric acid solution (4.4) and cover with a watch glass. Heat gently until the metal is dissolved. After cooling to room temperature, transfer the solution quantitatively into a 500 ml one-mark volu- metric flask, containing 1 00 ml of hydrochloric acid (4.1 ), dilute to the mark with water and mix well. 1 ml of this solution contains 1 mg of Sb.
4.12 Arsenic stock solution, 1 g/l As Weigh (0,5 ± 0,001 ) g of arsenic (As ≥ 99,99 %) and transfer into a 250 ml beaker. Add 20 ml of nitric acid solution (4.4) and cover with a watch glass. Heat gently until the metal is dissolved. After cooling to room temperature, transfer the solution quantitatively into a 500 ml one-mark volumetric flask, dilute to the mark with water and mix well. 1 ml of this solution contains 1 mg of As