SIST EN 15024-2:2007
(Main)Copper and copper alloys - Determination of zinc content - Part 2: Flame atomic absorption spectrometry method (FAAS)
Copper and copper alloys - Determination of zinc content - Part 2: Flame atomic absorption spectrometry method (FAAS)
This part of this European Standard specifies a flame atomic absorption spectrometric method (FAAS) for the determination of the zinc content of copper and copper alloys in the form of unwrought, wrought and cast products.
The method is applicable to products having zinc mass fractions between 0,000 5 % and 6,0 %.
Kupfer und Kupferlegierungen - Bestimmung des Zinkgehaltes - Teil 2: Flammenatomabsorptionsspektrometrisches Verfahren (FAAS)
Dieser Teil dieser Europäischen Norm legt ein flammenatomabsorptionsspektrometrisches Verfahren (FAAS)
für die Bestimmung des Zinkgehaltes in Kupfer und Kupferlegierungen fest, die als Gussstücke oder als plas-tisch
oder nicht plastisch geformte Produkte vorliegen.
Das Verfahren ist geeignet für Produkte mit Zink-Massenanteilen zwischen 0,000 5 % und 6,0 %.
Cuivre et alliages de cuivre - Dosage du zinc - Partie 2 : Méthode par spectrométrie d'absorption atomique dans la flamme (SAAF)
La présente Partie de cette Norme européenne spécifie une méthode par spectrométrie d'absorption atomique dans la flamme (SAAF) pour le dosage du zinc dans le cuivre et les alliages de cuivre, sous forme de produits non corroyés, corroyés et moulés.
Cette méthode est applicable aux produits ayant des teneurs (fractions massiques) en zinc comprises entre 0,000 1 % et 6,0 %.
Baker in bakrove zlitine - Določevanje cinka - 2. del: Metoda s plamensko atomsko absorpcijsko spektrometrijo (FAAS)
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Copper and copper alloys - Determination of zinc content - Part 2: Flame atomic absorption spectrometry method (FAAS)Cuivre et alliages de cuivre - Dosage du zinc - Partie 2 : Méthode par spectrométrie d'absorption atomique dans la flamme (SAAF)Kupfer und Kupferlegierungen - Bestimmung des Zinkgehaltes - Teil 2: Flammenatomabsorptionsspektrometrisches Verfahren (FAAS)Ta slovenski standard je istoveten z:EN 15024-2:2006SIST EN 15024-2:2007en77.120.30Baker in bakrove zlitineCopper and copper alloysICS:SLOVENSKI
STANDARDSIST EN 15024-2:200701-februar-2007
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15024-2November 2006ICS 77.120.30 English VersionCopper and copper alloys - Determination of zinc content - Part2: Flame atomic absorption spectrometry method (FAAS)Cuivre et alliages de cuivre - Dosage du zinc - Partie 2 :Méthode par spectrométrie d'absorption atomique dans laflamme (SAAF)Kupfer und Kupferlegierungen - Bestimmung desZinkgehaltes - Teil 2:Flammenatomabsorptionsspektrometrisches Verfahren(FAAS)This European Standard was approved by CEN on 18 September 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15024-2:2006: E
EN 15024-2:2006 (E) 2 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.11 9 Precision.12 10 Test report.13 Bibliography.14
EN 15024-2:2006 (E)
3 Foreword This document (EN 15024-2:2006) has been prepared by Technical Committee CEN/TC 133 “Copper and copper alloys”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2007, and conflicting national standards shall be withdrawn at the latest by May 2007. Within its programme of work, Technical Committee CEN/TC 133 requested CEN/TC 133/WG 10 "Methods of analysis" to prepare the following standard: EN 15024-2, Copper and copper alloys — Determination of zinc content — Part 2: Flame atomic absorption spec-trometry method (FAAS) This is one of two parts of the standard for the determination of zinc content in copper and copper alloys. The other part is: prEN 15024-1, Copper and copper alloys — Determination of zinc content — Part 1: Titrimetric method According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun-tries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Esto-nia, 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.
EN 15024-2:2006 (E) 4 1 Scope This part of this European Standard specifies a flame atomic absorption spectrometric method (FAAS) for the determination of the zinc content of copper and copper alloys in the form of unwrought, wrought and cast products. The method is applicable to products having zinc mass fractions between 0,000 5 % and 6,0 %. 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 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 fluoroboric-nitric acid mixture followed, after suitable dilution, by aspiration into an air/ acetylene flame of an atomic absorption spectrometer. Measurement of the absorption of the 213,8 nm
line emitted by a zinc 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 Fluoroboric-nitric acid mixture Mix together 300 ml of boric acid, H3BO3, 40 g/l solution, 30 ml of hydrofluoric acid, HF, (ρ = 1,13 g/l), 500 ml of ni-tric acid, HNO3 (ρ = 1,40 g/ml) and 150 ml of water. 4.3 Nitric acid, HNO3 (ρρρρ = 1,40 g/ml) 4.4 Nitric acid solution, 1 + 1 Dilute 1 000 ml of nitric acid (4.3) in 1 000 ml of water 4.5 Zinc stock solution, 5 g/l Zn Weigh (2,5 ± 0,001) g of zinc (Zn ≥ 99,99 %) and transfer it into a 250 ml tall-form beaker. Add 50 ml of the nitric acid solution (4.4), cover and heat gently until the zinc is completely dissolved. Boil the solution for several minutes to expel the nitrous fumes. Allow it to cool and 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 5 mg of Zn. 4.6 Zinc standard solution, 0,5 g/l Zn Transfer 10 ml of the zinc stock solution (4.5) into a 100 ml one-mark volumetric flask. Dilute to the mark with water and mix well.
EN 15024-2:2006 (E)
5 1 ml of this solution contains 0,5 mg of Zn. 4.7 Zinc standard solution, 0,05 g/l Zn Transfer 10,0 ml of the zinc stock solution (4.5) into a 1 000 ml one-mark volumetric flask. Dilute to the mark with water and mix well. 1 ml of this solution contains 0,05 mg of Zn. 4.8 Zinc standard solution, 0,01 g/l Zn Transfer 5,0 ml of the zinc standard solution (4.6) into a 250 ml one-mark volumetric flask. Dilute to the mark with water and mix well. 1 ml of this solution contains 0,01 mg of Zn. 4.9 Zinc standard solution, 0,001 g/l Zn Transfer 5,0 ml of the zinc standard solution (4.7) into a 250 ml one-mark volumetric flask. Dilute to the mark with water and mix well. 1 ml of this solution contains 0,001 mg of Zn. 4.10 Copper base solution, 20 g/l Cu Weigh 10,0 g of pure copper containing not more than 0,000 2 % mass fraction zinc into a 1 000 ml polytetrafluore-thylene, polypropylene or low-pressure polyethylene beaker. Add 400 ml of fluoroboric-nitric acid mixture (4.2). Heat gently until the copper is completely dissolved, then boil until the nitrous fumes have been expelled. In the case of polyethylene or polypropylene beakers, use a water bath for heating. Allow to cool and transfer the solution quantitatively into a 500 ml one-mark volumetric flask, dilute to the mark with water and mix well. 50 ml of this solution contains 1 g of Cu and 40 ml of attack solution (4.2). 4.11 Copper base solution, 2 g/l Cu Transfer, by means of a calibrated pipette, 10,0 ml of the copper base solution (4.10) into a 100 ml PTFE one-mark volumetric flask. Dilute to the mark with water and mix well. 1 ml of this solution contains 2 mg of Cu. 5 Apparatus 5.1 Ordinary laboratory apparatus 5.2 Burette, graduated in 0,05 ml or calibrated pipette. 5.3 Atomic absorption spectrometer, fitted with an air/acetylene burner. 5.4 Zinc 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 0,5 mm.
EN 15024-2:2006 (E) 6 7 Procedure 7.1 Preparation of the test portion solution 7.1.1 Test portion Weigh (1 ± 0,001) g of the test sample. 7.1.2 Test portion solution Transfer the test portion (7.1.1) into a 250 ml PTFE, polypropylene or low-pressure polyethylene beaker. Add 40 ml of the attack reagent (4.2). Cover with a watch glass and heat gently until the test portion is completely dissolved, then heat at a temperature of approximately 90 °C until the nitrous fumes have been expelled. Wash the beaker cover and the sides of the beaker with water and cool. 7.1.3 Zinc mass fractions between 0,000 5 % and 0,01 % Transfer the test portion solution (7.1.2) quantitatively into a 100 ml one-mark volumetric flask. Dilute to the mark with water and mix well. 7.1.4 Zinc mass fractions between 0,005 % and 0,06 % Transfer the test portion solution (7.1.2) quantitatively into a 200 ml one-mark volumetric flask. Dilute to the mark with water and mix well. 7.1.5 Zinc mass fractions between 0,05 % and 0,60 % Transfer the test portion solution (7.1.2) quantitatively into a 200 ml one-mark volumetric flask. Dilute to the mark with water and mix well. Transfer 10,0 ml of this solution, by means of a 25 ml burette or a calibrated pipette, into a 100 ml one-mark volumetric flask. Dilute to the mark with water and mix well. 7.1.6 Zinc mass fractions between 0,
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