EN 14726:2019
(Main)Aluminium and aluminium alloys - Determination of the chemical composition of aluminium and aluminium alloys by spark optical emission spectrometry
Aluminium and aluminium alloys - Determination of the chemical composition of aluminium and aluminium alloys by spark optical emission spectrometry
This document describes the criteria and the procedure for analysing aluminium and aluminium alloys with spark optical emission spectrometry (S-OES). The scope of this document covers the following:
- sample preparation;
- operational guidelines for an optical emission spectrometer (including maintenance);
- traceability of the analytical results to the International System of units: mass (kg);
- assessing the uncertainty associated with each analytical result.
This document refers to simultaneous spark emission spectrometers for the analysis of solid samples.
It applies to the determination of silicon, iron, copper, manganese, magnesium, chromium, nickel, zinc, titanium, boron, gallium, vanadium, beryllium, bismuth, calcium, cadmium, cobalt, lithium, sodium, phosphorus, lead, antimony, tin, strontium and zirconium in aluminium and aluminium alloys.
Elements other than those listed above may be analysed on the condition that:
a) suitable reference materials are available; and
b) the instrument is suitably calibrated and equipped.
In the case of determining mercury, for compliance purposes an alternate method with a limit of quantification < 0,000 1 % is recommended as its detection is compromised by intense iron interference at 253,65 nm.
The test result obtained from a spark optical emission spectrometer generally concerns an amount of less than one milligram per spark spot. The result can be used to refer to the laboratory test sample, to the aluminium or aluminium alloy melt or to the cast product.
Aluminium und Aluminiumlegierungen - Bestimmung der chemischen Zusammensetzung von Aluminium und Aluminiumlegierungen durch optische Emissionsspektrometrie mit Funkenanregung
Dieses Dokument beschreibt die Kriterien und die Durchführung der Analyse von Aluminium und Aluminiumlegierungen mit der optischen Emissionsspektrometrie mit Funkenanregung (F OES). Der Anwendungsbereich dieses Dokuments deckt Folgendes ab:
- Probenvorbereitung;
- Leitfaden für den Betrieb eines optischen Emissionsspektrometers (einschließlich Wartung);
- die Rückführbarkeit der Analysenergebnisse auf das Internationale Einheitensystem: Masse (kg);
- Beurteilung der Unsicherheit in Verbindung mit jedem Analyseergebnis.
Dieses Dokument bezieht sich auf Emissionsspektrometer mit simultaner Funkenanregung für die Analyse von Festproben.
Es gilt für die Bestimmung von Silicium, Eisen, Kupfer, Mangan, Magnesium, Chrom, Nickel, Zink, Titan, Bor, Gallium, Vanadium, Beryllium, Wismut, Calcium, Cadmium, Kobalt, Lithium, Natrium, Phosphor, Blei, Antimon, Zinn, Strontium und Zirconium in Aluminium und Aluminiumlegierungen.
Andere Elemente neben den oben aufgeführten dürfen analysiert werden, vorausgesetzt, dass:
a) geeignete Referenzmaterialien zur Verfügung stehen und
b) das Gerät entsprechend kalibriert und ausgestattet ist.
Für die Bestimmung von Quecksilber wird zum Zwecke der Erfüllung der Konformitätsanforderungen ein alternatives Verfahren mit einer Bestimmungsgrenze von < 0,000 1 % empfohlen, da dessen Bestimmung durch starke Eiseninterferenz bei 253,65 nm beeinträchtigt wird.
Das aus einem optischen Emissionsspektrometer mit Funkenanregung erhaltene Prüfergebnis betrifft in der Regel eine Menge von weniger als 1 mg je Brennfleck. Das Ergebnis kann sich auf die Laboranalysenprobe, die Schmelzcharge des Aluminiums oder der Aluminiumlegierung oder auf das Gussprodukt beziehen.
Aluminium et alliages d'aluminium - Détermination de la composition chimique de l'aluminium et des alliages d'aluminium par spectrométrie d'émission optique à étincelles
Le présent document décrit les critères et la procédure d’analyse de l’aluminium et des alliages d’aluminium par spectrométrie d’émission optique à étincelles (SEO-E). Le domaine d’application du présent document couvre les aspects suivants :
- préparation de l’échantillon ;
- lignes directrices relatives au fonctionnement d’un spectromètre d’émission optique (y compris la maintenance) ;
- raccordement des résultats d’analyse au système international d’unités : la masse (kg) ;
- évaluation de l’incertitude associée à chaque résultat d’analyse.
Le présent document concerne les spectromètres d’émission à étincelles simultanés permettant l’analyse d’échantillons solides.
Il s’applique à la détermination du silicium, fer, cuivre, manganèse, magnésium, chrome, nickel, zinc, titane, bore, gallium, vanadium, béryllium, bismuth, calcium, cadmium, cobalt, lithium, sodium, phosphore, plomb, antimoine, étain, strontium et zirconium dans l’aluminium et les alliages d’aluminium.
D’autres éléments que ceux énumérés ci-dessus peuvent être analysés à condition que :
a) les matériaux de référence appropriés soient disponibles ; et
b) l’instrument soit correctement étalonné et équipé.
Dans le cas de la détermination du mercure, pour des besoins de conformité, une autre méthode avec une limite de quantification < 0,000 1 % est recommandée car sa détection est compromise par une forte interférence du fer à 253,65 nm.
Le résultat d’essai obtenu au moyen d’un spectromètre d’émission optique à étincelles concerne généralement une quantité inférieure à un milligramme par étincelle. Le résultat peut être utilisé pour faire référence à l’échantillon d’essai pour laboratoire, à l’aluminium ou l’alliage d’aluminium liquide ou au produit coulé.
Aluminij in aluminijeve zlitine - Ugotavljanje kemijske sestave aluminija in aluminijevih zlitin z optično emisijsko spektrometrijo z iskro
Ta dokument opisuje merila in postopek upravljanja za izvedbo optične emisijske spektrometrije z iskro (S-OES) na kovinskih vzorcih. Področje uporabe tega standarda zajema:
– pripravo vzorcev;
– operativne smernice za optični emisijski spektrometer (vključno s samovzdrževanjem);
– sledljivost analitskih rezultatov do mednarodnih osnovnih enot – masa (kg);
– ocenjevanje negotovosti, povezane s posameznim analitskim rezultatom.
Ta dokument se nanaša na sočasno delujoče emisijske spektrometre z iskro za analizo trdnih vzorcev.
Uporablja se za določevanje silicija, železa, bakra, mangana, magnezija, kroma, niklja, cinka, titana, bora, galija, vanadija, berilija, bizmuta, kalcija, kadmija, kobalta, litija, natrija, fosforja, svinca, antimona, kositra, stroncija in cirkonija v aluminiju in aluminijevih zlitinah.
Elementi, ki niso navedeni zgoraj, se lahko analizirajo pod pogojem, da:
a) so na voljo primerni referenčni materiali in
b) je instrument ustrezno umerjen in opremljen.
V primeru določevanja živega srebra se za namene skladnosti priporoča alternativna metoda z mejo kvantifikacije <0,0001 %, saj zaznavanje tega elementa moti močan vpliv železa pri 253,65 nm.
Pri rezultatu preskusa, pridobljenem z optičnim emisijskim spektrometrom z iskro, se običajno uporablja masa vzorčenja, ki je manjša od enega miligrama na točko iskrenja. Rezultat se lahko uporabi za laboratorijski preskusni vzorec, talino aluminija ali aluminijeve zlitine ali za ulitek.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aluminium und Aluminiumlegierungen - Bestimmung der chemischen Zusammensetzung von Aluminium und Aluminiumlegierungen durch optische FunkenemissionsspektralanalyseAluminium et alliages d'aluminium - Détermination de la composition chimique de l'aluminium et des alliages d'aluminium par spectrométrie d'émission optique à étincellesAluminium and aluminium alloys - Determination of the chemical composition of aluminium and aluminium alloys by spark optical emission spectrometry77.120.10Aluminij in aluminijeve zlitineAluminium and aluminium alloys77.040.30Kemijska analiza kovinChemical analysis of metalsICS:Ta slovenski standard je istoveten z:EN 14726:2019SIST EN 14726:2019en,fr,de01-maj-2019SIST EN 14726:2019SLOVENSKI
STANDARDSIST EN 14726:20051DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14726
March
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y yä s t rä s r Supersedes EN
s v y t xã t r r wEnglish Version
Aluminium and aluminium alloys æ Determination of the chemical composition of aluminium and aluminium alloys by spark optical emission spectrometry Aluminium et alliages d 5aluminium æ Détermination de la composition chimique de l 5aluminium et des alliages d 5aluminium par spectrométrie d 5émission optique à étincelles
Aluminium und Aluminiumlegierungen æ Bestimmung der chemischen Zusammensetzung von Aluminium und Aluminiumlegierungen durch optische Emissionsspektrometrie mit Funkenanregung This European Standard was approved by CEN on
u r December
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
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EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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Rue de la Science 23,
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t r s { CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s v y t xã t r s { ESIST EN 14726:2019
2 Contents Page European foreword . 3 Introduction . 4 1 Scope . 5 2 Normative references . 5 3 Terms and definitions . 5 4 Symbols and abbreviations . 6 5 Principle . 6 6 Apparatus . 6 6.1 Spark optical emission spectrometer . 6 6.2 Equipment for sample preparation . 6 7 Consumables and reference materials . 7 7.1 Consumables . 7 7.2 Reference materials and recalibration samples . 7 8 Samples . 7 8.1 General case . 7 8.2 Sampling of finished and semi-finished products . 8 8.3 Sample preparation . 8 9 Operating conditions of the spectrometer and measurements . 9 10 Calibration procedure . 11 10.1 General . 11 10.1.1 Calibration process . 11 10.1.2 Range of calibration . 11 10.1.3 Number of sparks on calibration samples . 11 10.2 Calibration . 11 10.3 Recalibration . 12 10.4 Type recalibration . 12 10.5 Alloy group recalibration with simultaneous calibration . 12 11 Accuracy (precision and trueness) . 12 12 Controls . 12 13 Test report . 13 Annex A (informative)
Representative sparking area . 14 Annex B (informative)
Detailed information on calibration . 15 Annex C (informative)
Detailed information on recalibration . 19 Annex D (informative)
Detailed information on accuracy and uncertainty . 21 Annex E (informative)
Guidance for controls . 24 Bibliography . 26 SIST EN 14726:2019
4 Introduction In spark optical emission spectrometry (S-OES), a small portion of the sample is thermally vaporized through the erosion of an electric spark. In the spark discharge, the aerosol is vaporized, partially ionized and excited to emit optical radiation. The characteristic radiation of each element is used in spark optical emission spectrometry for its detection and for its quantitative determination. Optical emission spectrometry (OES): A technique that measures the emission characteristic of a material in the ultraviolet, visible, or infrared wavelength regions of the electromagnetic spectrum. Atomised particles are excited, and each element emits a characteristic radiant energy. This characteristic radiation is detected using either a photomultiplier tube or a solid state detector; appropriate software is used to record the presence of elements and to quantitatively determine elemental content. Spark optical emission spectrometry (S-OES): A technique that utilizes a high voltage capacitor discharge to ablate and atomise a section of the tested material in an inert atmosphere. The excited atoms and ions emit electromagnetic radiation, which is detected and analysed by an optical emission spectrometer. Spark optical emission spectrometry is suitable for determining the chemical composition of alloys before the manufacturing and casting processes: in these cases, samples are taken from the liquid metal at different stages of the casting process. Spark optical emission spectrometry is also used to determine the chemical composition of final products. The method covered by this document is primarily for the analysis of aluminium or aluminium alloy chill cast solid samples, as described in EN 14361, although other samples forms are acceptable. SIST EN 14726:2019
IEC Electropedia: available at http://www.electropedia.org/
ISO Online browsing platform: available at http://www.iso.org/obp SIST EN 14726:2019
6 4 Symbols and abbreviations Symbols are defined for each formula. Abbreviations are put in brackets immediately after a term first appears in the text (e.g. S-OES). 5 Principle Measurement of the intensity of the radiation, whose wavelength is characteristic of each element, generated by a spark resulting from the application of an electrical discharge between the sample, as one electrode, and an inert counter-electrode, after mechanical preparation of the surface of the sample, which is in general taken from the metal melt. The content of each element is determined by relating the measured intensities of the samples to calibration curves. Signals are evaluated using: — alloy calibration and
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