1、CEN EN*27b27-3 93 3404589 O047373 03b EUROPEAN STANDARD EN 27627-1 NORME EUROPENNE EUROPISCHE NORM April 1993 UDC 669.018.25 : 620.1 : 543.422 Descriptors: Powder metallurgy, hard metals, chemical analysis, atomic absorption spectrophotometry, chemical element, minimum contents, maximum contents, ca
2、rbides English version Hardmetals - Chemical analysis by flame atomic absorption spectrometry - Part 1 : General requirements (IS0 7627-1 : 1983) Mtaux-durs - Analyse chimique par spectromtrie dabsorption atomique dans la flamme - Partie 1: Caractristiques gnrales Hartmetalle - Chemische Analyse dur
3、ch Flammenabsorptionsspektrometrie - Bi1 1: Allgemeine Anforderungen (IS0 7627-1 : 1983) (IS0 7627-1 : 1983) This European Standard was approved by CEN on 1993-04-02. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Stan
4、dard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French,
5、 German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, Fran
6、ce, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O
7、1993 Copyright reserved to CEN members Ref. No. EN 27627-1 : 1993 E CEN EN*Zb27-L 93 m 3404589 0047L74 T52 Page 2 EN 27627-1 : 1993 Foreword In 1992, IS0 7627-1 : 1983 Hardmetals - Chemical analysis by jume atomic absorption spectrometry - hrt 1: General requirements was submitted to the CEN Primary
8、 Questionnnaire procedure. Following the positive result of the CEN/CS Proposal IS0 7627-1 : 1983 was submitted to the CEN Formal Vote. The result of the Formal Vote was positive. This European Standard shall be given the status of a national standard, either by publication of an identical text or b
9、y endorsement, at the latest by October 1993, and conflicting national standards shall be withdrawn at the latest by October 1993. According to the Internal Regulations of CENKENELEC, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, G
10、ermany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN EN*Z7bZ7-3 93 3404589 0047375 999 M 1 Page 3 EN 27627-1 : 1993 1 Scope This part of IS0 7627 lays down general requirements for the chemical analysis of hardmetals b
11、y flame atomic absorption. NOTE - The method for the determination of chromium also permits determination of iron, nickel, cobalt and manganese within the range Ofo1 to 9 (mlm). 3 Principle Dissolution of a test portion and determination by flame atomic absorption spectrometry. Subsequent parts of t
12、his International Standard (see the table) specify methods for determination of the content of the follow- ing elements by flame atomic absorption spectrometry. calcium cobalt chromium iron potassium magnesium manganese molybdenum sodium nickel titanium vanadium 2 Field of application The method is
13、applicable to a) carbides of chromium, niobium, tantalum, titanium, tungsten, vanadium, b) mixtures of these carbides and binder metals, c) all grades of presintered or sintered hardmetals, pro- duced from these carbides, d) coated hardmetals, after total removal of coating, with the elements shown
14、in the table. Table - IS0 7627 part number, elements and ranges covered in the relevant part Element Relevant part 1 of IS07627 762712 Ca, K, Mg, Na 0,001 to 0.02 762713 Co, Fe, Mn, Ni 0,Ol to 0.5 762714 Mo, Ti, V 0,Ol to 0,5 762715 4 Interfering elements Effects of interference are minimized by usi
15、ng a similar matrix in test and calibration solutions. 5 Reagents During the analysis, use only reagents of recognized analytical grade and only double-distilled water or water of equivalent purity. NOTE - In certain cases, reagents of higher purity should be used. 6 Apparatus Ordinary laboratory ap
16、paratus and atomic absorption spectro- metry apparatus. NOTE - All measurement parameters should be chosen to give optimum sensitivity. Single-element hollow-cathode lamps are recommended. The recom- mended instrument requirements are shown in the relevant parts of this International Standard. 7 Sam
17、pling 7.1 If necessary, the sample may be crushed in a mortar made of a material which does not alter the sample composi- tion. If the sample contains lubricant, this shall be extracted before the analysis. 7.2 The analysis shall be carried out on at least three test portions. CEN ENx27627-L 93 = 34
18、04589 0047l17b 825 age 4 EN 27627-1 : 1993 8 Procedure ,# b) all details necessary for identification of the test The procedure is given in the relevant parts of this International Standard. c) the results obtained, .e. the arithmetical mean; sample; 9 Test report The test report shall include the following information: a) a reference to this International Standard; d) all operations not specified by this International Stan- dard, or regarded as optional; e) details of any occurrence which may have affected the result.
