SIST-TS CEN/TS 15025:2007

SLOVENSKI STANDARD
SIST-TS CEN/TS 15025:2007
01-februar-2007
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Copper and copper alloys - Determination of magnesium content - Flame atomic
absorption spectrometry method (FAAS)
Kupfer und Kupferlegierungen - Bestimmung des Magnesiumgehaltes -
Flammenatomabsorptionsspektrometrisches Verfahren (FAAS)
Cuivre et alliages de cuivre - Dosage du magnésium - Méthode par spectrométrie
d'absorption atomique dans la flamme (SAAF)
Ta slovenski standard je istoveten z: CEN/TS 15025:2006
ICS:
77.120.30 Baker in bakrove zlitine Copper and copper alloys
SIST-TS CEN/TS 15025:2007 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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TECHNICAL SPECIFICATION
CEN/TS 15025
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
November 2006
ICS 77.120.30

English Version
Copper and copper alloys - Determination of magnesium content
- Flame atomic absorption spectrometry method (FAAS)
Cuivre et alliages de cuivre - Dosage de magnésium - Kupfer und Kupferlegierungen - Bestimmung des
Méthode par spectrométrie d'absorption atomique dans la Magnesiumgehaltes -
flamme (SAAF) Flammenatomabsorptionsspektrometrisches Verfahren
(FAAS)
This Technical Specification (CEN/TS) was approved by CEN on 12 September 2006 for provisional application.
The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.
CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 15025:2006: E
worldwide for CEN national Members.

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CEN/TS 15025:2006 (E)
Contents Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Principle.4
4 Reagents and materials .4
5 Apparatus .5
6 Sampling.5
7 Procedure .6
8 Expression of results .9
9 Precision.10
10 Test report .10
Bibliography .12

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CEN/TS 15025:2006 (E)
Foreword
This document (CEN/TS 15025:2006) has been prepared by Technical Committee CEN/TC 133 “Copper and
copper alloys”, the secretariat of which is held by DIN.
Within its programme of work, Technical Committee CEN/TC 133 requested CEN/TC 133/WG 10 "Methods of
analysis" to prepare the following Technical Specification:
CEN/TS 15025, Copper and copper alloys — Determination of magnesium content — Flame atomic absorption
spectrometry method (FAAS)
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United
Kingdom.

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CEN/TS 15025:2006 (E)
1 Scope
This Technical Specification specifies a flame atomic absorption spectrometric method (FAAS) for the
determination of magnesium content of copper and copper alloys in the form of unwrought, wrought and cast
products.
The method is applicable to products having magnesium mass fractions between 0,001 % and 0,20 %.
2 Normative references
The following referenced documents are indispensable for the application of this Technical Specification. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
ISO 1811-1, Copper and copper alloys — Selection and preparation of samples for chemical analysis — Part 1:
Sampling of cast unwrought products
ISO 1811-2, 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 in a hydrochloric-nitric acid mixture followed, after suitable dilution, by aspiration into an
air/acetylene flame of an atomic absorption spectrometer. Determination of the magnesium content by measuring
the absorption of the 285,2 nm line emitted by a magnesium hollow-cathode lamp.
4 Reagents and materials
4.1 General
During the analysis, use only reagents of recognized analytical grade and only distilled water or water of equivalent
purity.
4.2 Hydrochloric acid, HCl (ρ = 1,19 g/ml)
4.3 Nitric acid, HNO (ρ = 1,40 g/ml)
3
4.4 Nitric acid solution, 1 + 1
Dilute 100 ml of nitric acid (4.3) in 100 ml of water.
4.5 Magnesium stock solution, 0,5 g/l Mg
Weigh (0,5 ± 0,001) g of magnesium (Mg ≥ 99,9 %) and transfer it into a 250 ml beaker. Add 20 ml of the nitric acid
solution (4.4) in small amounts. Cover with a watch glass and heat gently until the magnesium is completely
dissolved. Boil the solution until nitrous fumes have been expelled. Cool to room temperature, transfer the solution
quantitatively into a 1 000 ml one-mark volumetric flask. Dilute to the mark with water and mix well.
1 ml of this solution contains 0,5 mg of Mg.
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CEN/TS 15025:2006 (E)
4.6 Magnesium standard solution, 0,01 g/l Mg
Using a calibrated pipette, transfer 5 ml of the magnesium stock solution (4.5) into a 250 ml one-mark volumetric
flask. Dilute to the mark with water and mix well.
Prepare this solution immediately prior to use.
1 ml of this solution contains 0,01 mg of Mg.
4.7 Magnesium standard solution, 0,000 5 g/l Mg
Using a calibrated pipette, transfer 5 ml of the magnesium standard solution (4.6) into a 100 ml one-mark
volumetric flask. Dilute to the mark with water and mix well.
Prepare this solution immediately prior to use.
1 ml of this solution contains 0,000 5 mg of Mg.
4.8 Lanthanum (III) chloride solution, 200 g/l
Dissolve 200 g of lanthanum chloride heptahydrate (LaCl ·7H O) in a 2 000 ml beaker with approximately 800 ml of
3 2
water. Transfer the solution into a 1 000 ml one-mark volumetric flask. Dilute to the mark with water and mix well.
4.9 Copper base solution, 50 g/l Cu
Weigh (50 ± 0,01) g of electrolytic copper and transfer it into a 2 000 ml beaker. Add 500 ml of hydrochloric acid
(4.2) and, in small amounts, 250 ml of the nitric acid solution (4.4). Cover with a watch glass and heat gently until
the copper is dissolved, then boil until the nitrous fumes have been expelled. Cool to room temperature and
transfer the solution into a 1 000 ml one-mark volumetric flask. Dilute to the mark with water and mix well.
4.10 Copper base solution, 10 g/l Cu
Transfer 50 ml of the copper base solution (4.9) into a 250 ml one-mark volumetric flask, add 15 ml of the nitric acid
solution (4.4). Dilute to the mark with water and mix well.
1 ml of this solution contains 0,01 g of Cu.
5 Apparatus
5.1 Ordinary laboratory apparatus
5.2 Atomic absorption spectrometer, fitted with an air/acetylene burner
5.3 Magnesium hollow-cathode lamp
6 Sampling
Sampling shall be carried out in accordance with ISO 1811-1 or ISO 1811-2, as appropriate.
Test samples shall be in the form of fine drillings, chips or millings, with a maximum thickness of 0,3 mm.
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CEN/TS 15025:2006 (E)
7 Procedure
7.1 Preparation of the test portion solution
7.1.1 Test portion
Weigh (1 ± 0,001) g of the test sample.
7
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