EN 24501-1993 en Hardmetals - Determination of Titanium - Photometric Peroxide Method《硬质合金 钛含量的测定 过氧化物光度法(ISO 4501-1978)》.pdf

1、CEN EN+24501 93 D 3404589 0054089 729 D EUROPEAN STANDARD EUROPISCHE NORM NORME EUROPENNE EN 24501 October 1993 UM; 621.762 : 661.665.2 : 546.82 : 543.42 Descriptors: Powder metallurgy, hard metais, chemical analysis, determination of content, titanium, spectrophotometric analysis English version Ha

2、rdmetals - Determination of titanium - Photometrie peroxide method (IS0 4501 : 1978) Mtaux durs - Dtermination du titane - Mthode photomtrique au peroxyde (IS04501 : 1978) Wasserstoffsuperoxidmethode Hartmetalle - Bestimmung des Titangehaltes - Photometrische (IS0 4501 : 1978) This European Standard

3、 was approved by CEN on 1993-10-25. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such natio

4、nal 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, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and not

5、ified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingd

6、om. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1993 Copyright reserved to CEN members Ref. No. EN 24501 : 1993 E CEN ENx2Y501 93 = 39095139 O059090 YYO Page 2 EN 24501 : 1993 Fore

7、word On the proposal of the CEN Central Secretariat, the %chnical Board decided to submit the International Standard: Hardmetals - Determination of titanium - Photmtric pero a is the absorbance when the concentration is 1 mg of titanium per 250 rnl with a 10 mm cell; m is the mass, in milligrams, of

8、 the test portion; V is the volume, in millilitres, of the coloured solution; L is the cell length, in millimetres. The result shall be rounded to the nearest 0,Ol %. 11.3 Final results Report the arithmetical mean of acceptable determinations rounded to the nearest 0.1 %. 12 TEST REPORT The test re

9、port shall include the following information : a) reference to this International Standard; b) all details necessary for identification of the test sample; c) the result obtained; d) all operations not specified by this International Standard, or regarded as optional; e) details of any occurrence which may have affected the result.