EN 27627-6:1993

Hardmetals - Chemical analysis by flame atomic absorption spectrometry - Part 6: Determination of chromium in contents from 0,01 to 2 % (m/m) (ISO 7627-6:1985)

General requirements concerning the field of application, principle, interfering elements, apparatus, sampling and test report are given in ISO 7627-1.

Hartmetalle - Chemische Analyse durch Flammenatomabsorptionsspektrometrie - Teil 6: Bestimmung des Chromgehaltes von 0,01 bis 2 % (m/m) (ISO 7627-6:1985)

Métaux-durs - Analyse chimique par spectrométrie d'absorption atomique dans la flamme - Partie 6: Dosage du chrome à des teneurs comprises entre 0,01 et 2 % (m/m) (ISO 7627-6:1985)

La présente partie de l'ISO 7627 spécifie la méthode à utiliser pour le dosage par spectrométrie d'absorption atomique dans la flamme du chrome dans les métaux-durs, à des teneurs comprises entre 0,001 et 2 % (m/m). Les prescriptions générales concernant le domaine d'application, le principe, les interférences, l'appareillage, l'échantillonnage et le procès-verbal d'essai figurent dans l'ISO 7627/1.

Hardmetals - Chemical analysis by flame atomic absorption spectrometry - Part 6: Determination of chromium in contents from 0,01 to 2 % (m/m) (ISO 7627-6:1985)

General Information

• Status: Published
• Publication Date: 06-Apr-1993
• Withdrawal Date: 30-Oct-1993
• ICS: 77.040.30 - Chemical analysis of metals
• ICS: 77.160 - Powder metallurgy
• Technical Committee: CEN/SS M11 - Powder metallurgy
• Drafting Committee: CEN/SS M11 - Powder metallurgy
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 01-Oct-1997
• Completion Date: 01-Oct-1997
• Ref Project: SIST EN 27627-6:2000 - Hardmetals - Chemical analysis by flame atomic absorption spectrometry - Part 6: Determination of chromium in contents from 0,01 to 2 % (m/m) (ISO 7627-6:1985)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Hardmetals - Chemical analysis by flame atomic absorption spectrometry - Part 6: Determination of chromium in contents from 0,01 to 2 % (m/m) (ISO 7627-6:1985)Hartmetalle - Chemische Analyse durch Flammenatomabsorptionsspektrometrie - Teil 6: Bestimmung des Chromgehaltes von 0,01 bis 2 % (m/m) (ISO 7627-6:1985)Métaux-durs - Analyse chimique par spectrométrie d'absorption atomique dans la flamme - Partie 6: Dosage du chrome a des teneurs comprises entre 0,01 et 2 % (m/m) (ISO 7627-6:1985)Hardmetals - Chemical analysis by flame atomic absorption spectrometry - Part 6: Determination of chromium in contents from 0,01 to 2 % (m/m) (ISO 7627-6:1985)77.160Metalurgija prahovPowder metallurgy77.040.30Kemijska analiza kovinChemical analysis of metalsICS:Ta slovenski standard je istoveten z:EN 27627-6:1993SIST EN 27627-6:2000en01-december-2000SIST EN 27627-6:2000SLOVENSKI
STANDARD



SIST EN 27627-6:2000



SIST EN 27627-6:2000



SIST EN 27627-6:2000



SIST EN 27627-6:2000



SIST EN 27627-6:2000



International Standard 762716 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEIKI(LLYHAPOAHAR OPTAHM3AWlR IlO CTAHAAPTl’l3ALlWl.ORGANlSATlON INTERNATIONALE DE NORMALlSATlON Hardmetals - Chemical analysis by flame atomic absorption spectrometry - Part 6 : Determination of chromium in contents from 0,Ol to 2 % (mlm) Aktaux-durs - Analyse chimique par spectromktrie d’absorption atomique dans la flamme - Partie 6 : Dosage du chrome ;i des teneurs comprises entre O,Ol et 2 % Mm) UDC 669.018.25 : 543.422 : 546.76 Ref. No. IS0 7627/6-1985 (E) Descriptors : powder metallurgy, hard metals, chemical analysis, determination of content, chromium, atomic absorption method. Price based on 2 pages First edition - 1985-04-01 SIST EN 27627-6:2000



Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. They are approved in accordance with IS0 procedures requiring at least 75 % approval by the member bodies voting. International Standard IS0 7627/6 was prepared by Technical Committee ISO/TC 119, Powder metallurgy. 0 International Organization for Standardization, 1985 Printed in Switzerland SIST EN 27627-6:2000



INTERNATIONAL STANDARD IS0 7627/6-1985 (E) Hardmetals - Chemical analysis by flame atomic absorption spectrometry - Part 6 : Determination of chromium in contents from 0,Ol to 2 % (m/m) 1 Scope and field of application This part of IS0 7627 specifies the method to be used for the determination of the chromium content of hardmetals within the range 0,Ol to 2 % (m/m) by flame atomic absorption spec- trometry. General requirements concerning the field of application, prin- ciple, interfering elements, apparatus, sampling and test report are given in IS0 7627/l. 2 Reference IS0 762711, Hardmetals - Chemical analysis by flame atomic absorption spectrometry - Part 7 : General requirements. 3 Reagents 3.1 Potassium pyrosulfate. 3.2 Perchloric acid, Q 1,54 or 1,67 g/ml. 3.3 Ammonium citrate, solution. Dissolve 100 g of citric acid in 1 500 ml of water and add 400 ml of ammonia solution (Q 0,91 g/ml). 3.4 Hydrogen peroxide, 30 % (m/m). 3.5 High purity stock solution, for calibration purposes, containing 1,000 g of chromium per litre. NOTE - This value is understood to establish a maximum limit of 1,000 5 g and a minimum limit of 0,999 5 g. 4 Procedure 4.1 Test portion Weigh, to the nearest 0,001 g, the relevant amount of the test sample indicated in table 1. Transfer it to a 100 ml conical flask (preferably of quartz). NOTE - In this special case, the sample shall pass a 0,18 mm sieve. 4.2 Dissolution of the test portion Add 5 g of the potassium pyrosulphate (3.1) and a few drops of the perchloric acid (3.2) to the beaker containing the test por- tion (4.1) and heat gently until the test portion is completely dissolved. Add 40 ml of the ammonium citrate solution (3.3), and about 0,5 ml of the hydrogen peroxide (3.4). Then transfer the solution to a 100 ml polypropylene one-mark volumetric flask and dilute to the mark. Table 1 - Test portion, instrumental parameters and characteristics of calibration functions Dilution Reciprocal Content Test portion volume 04 for the test Oxidant Wavelength sensitivity, for 1 % Linear range’) portionl) absorptionl) % 9 ml nm Is/ml % 0,Ol to 0,l 0,500 100 N2O 357,9 0,ll 0 t
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