SIST EN 14936-1:2006
(Main)Copper and copper alloys - Determination of aluminium content - Part 1: Titrimetric method
Copper and copper alloys - Determination of aluminium content - Part 1: Titrimetric method
This part of this European Standard specifies a titrimetric method for the determination of the aluminium content of copper and copper alloys in the form of unwrought, wrought and cast products.
The method is applicable to products having aluminium mass fractions between 0,5 % and 12 %.
Kupfer und Kupferlegierungen - Bestimmung des Aluminiumgehaltes - Teil 1: Titrimetrisches Verfahren
Dieser Teil dieser Europäischen Norm legt ein titrimetrisches Verfahren für die Bestimmung des Aluminiumgehaltes
in Kupfer und Kupferlegierungen fest, die als Gussstücke oder als plastisch oder nicht plastisch geformte Produkte
vorliegen.
Das Verfahren ist geeignet für Produkte mit Aluminiumgehalten zwischen 0,5 % und 12 % (Massenanteil).
Cuivre et alliages de cuivre - Dosage de l'aluminium - Partie 1 : Méthode titrimétrique
Cette partie de la présente Norme européenne spécifie une méthode titrimétrique de dosage de l’aluminium dans le cuivre et les alliages de cuivre sous la forme de produits non corroyés, corroyés et coulés.
La méthode s’applique aux produits ayant des teneurs en aluminium comprises entre 0,5 % et 12 %.
Baker in bakrove zlitine – Določevanje aluminija – 1. del: Titrimetrijska metoda
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Copper and copper alloys - Determination of aluminium content - Part 1: Titrimetric methodCuivre et alliages de cuivre - Dosage de l'aluminium - Partie 1 : Méthode titrimétriqueKupfer und Kupferlegierungen - Bestimmung des Aluminiumgehaltes - Teil 1: Titrimetrisches VerfahrenTa slovenski standard je istoveten z:EN 14936-1:2006SIST EN 14936-1:2006en77.120.30ICS:SLOVENSKI
STANDARDSIST EN 14936-1:200601-september-2006
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14936-1June 2006ICS 77.120.30 English VersionCopper and copper alloys - Determination of aluminium content -Part 1: Titrimetric methodCuivre et alliages de cuivre - Dosage de l'aluminium -Partie 1 : Méthode titrimétriqueKupfer und Kupferlegierungen - Bestimmung desAluminiumgehaltes - Teil 1: Titrimetrisches VerfahrenThis European Standard was approved by CEN on 15 May 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 14936-1:2006: E
EN 14936-1:2006 (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.5 8 Expression of results.7 9 Precision.7 10 Test report.8 Bibliography.9
EN 14936-1:2006 (E) 3 Foreword This document (EN 14936-1:2006) 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 December 2006, and conflicting national standards shall be withdrawn at the latest by December 2006. 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 14936-1, Copper and copper alloys — Determination of aluminium content — Part 1: Titrimetric method This is one of two parts of the standard for the determination of aluminium content in copper and copper alloys. The other part is: EN 14936-2, Copper and copper alloys — Determination of aluminium content — Part 2: FAAS 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 14936-1:2006 (E) 4 1 Scope This part of this European Standard specifies a titrimetric method for the determination of the aluminium content of copper and copper alloys in the form of unwrought, wrought and cast products. The method is applicable to products having aluminium mass fractions between 0,5 % and 12 %. 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 NOTE Informative references to documents used in the preparation of this standard, and cited at the appropriate places in the text, are listed in the Bibliography. 3 Principle Determination of aluminium by chelatometric titration at pH about 6, following a sodium fluoride demasking procedure, and using a voltametric indication. 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 Hexamethylenetetramine, (CH2)6N4. 4.3 Chloroform, CHCl3. 4.4 Perchloric acid, HClO4 (ρ = 1,68 g/ml). WARNING — Perchloric acid, concentrated and hot, reacts rapidly, often with violently explosive force, with oxidizable materials. Specially designed hoods are specified for handling perchloric acid fumes and any hood in which perchloric acid is fumed should not be used for other operations that permit easily oxi-dizable materials to collect in the ducts and blower. 4.5 Nitric acid, HNO3 (ρ = 1,40 g/ml). 4.6 Nitric acid solution, 1 + 1 Dilute 50 ml of nitric acid (4.5) in 50 ml of water. 4.7 Hydrochloric acid, HCl (ρ = 1,19 g/ml).
EN 14936-1:2006 (E) 5 4.8 Hydrochloric acid solution, 1 + 1 Dilute 50 ml of hydrochloric acid (4.7) in 50 ml of water. 4.9 Disodium salt of ethylenediaminetetra-acetic acid (EDTA), C10H14N2Na2O8 · 2 H2O, 0,2 mol/l Dissolve 74,448 g Disodium-ethylenediaminetetra-acetic acid dihydrate in water and dilute to 1 000 ml. 4.10 Hydrogen peroxide, H2O2 30 % (mass fraction) solution 4.11 Cupferron solution Dissolve 10 g of cupferron in 100 ml water. 4.12 Manganese solution, 4,55 g/l of Mn(NO3)2 · 4H2O. 4.13 Copper base solution, 0,05 mol/l solution Weigh 3,177 g of copper, (Cu ≥ 99,9 %) and transfer it into a 250 ml beaker. Add 20 ml of nitric acid (4.5). Heat gently until the copper is dissolved, and then bring to the boiling point until the 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. 4.14 Sodium fluoride solution, NaF 25 g/l. 5 Apparatus 5.1 Ordinary laboratory apparatus 5.2 Potentiometer in connection with a device for a voltametric indication, i.e. for polarising the elec-trodes with a constant current of 2 µA to 10 µA. This attachment can be made in a simple way using, for example, an accumulator or a storage battery of 2 V in series with a 1 M resistor and the electrodes. The potentiometer shall be in parallel with the electrodes. 5.3 Double platinum electrode, made of 1 mm diameter platinum wire, sealed in a glass tube directly or af-ter welding on a copper wire in such a way that each wire electrode is about 4 mm long with a free geometric sur-face of about 10 mm2. 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 drilli
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