1、V EUROPE AN STAN DA RD NORMEEUROPENNE I EUROPAISCHE NORM EN 10 179 January 1989 LDC 543.42.062: 546. Key words : Iron and ni trogen 7:669.14 steel products, chemical analysis, determination of content spectrophotometric analysis English version Chemical analysis of ferrous materials Spectrophotometr
2、ic method Determination of nitrogen(trace mounts) in steel Analyse chimique des matriaux sidrurgiques - Dosage de lazote ( ltat de traces) dans les aciers Mthode spectrophotomtrique Chemische Analyse von Eisen- und Stahlwerkstoffen - Bestimmung von Stickstoff (Spuren-Gehalte) in Stahl - Photometrisc
3、hes Verfahren This European Standard was accepted by CEN onl989-01-15. CEN members are bcmd to comply with the requirements of the CEN/CENELEC Rules whichstipuiate tne conditions for giving this European Standard the status of a national stardard without any alteration. Up-to-date lists and bibliogr
4、aphical references concerning such national stas- dards may be obtained on application to the CEN Central Secretariat or to any CEN member. This European Standard exists in the official versions (English, French, Ger- man). A version in any other language made by translation under the responsi- bili
5、ty of a CEN member into its own language and notified to CEN Central Sec- retariat has the same status as the official versions. CEN members are the national standards organizations of Austria, Belgium, Denmark , Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg , Netherlands , No
6、rway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CE# European Cdttee for Standardization Coacit Europen de Nomalisation Europisches Komitee fr Normung Central Secretariat : Rue Brederode 2, B-1000 Brussels 10 179:1989 E CEN 1989 Copyright reserved to all CEN members Ref.No. EN CEN EN*L
7、O*L77 87 E 3404587 O000202 5 _- I BEST COPY AVAILABLE EN 10 ?79 Page 2 Brief History This European Standard takes over the content of EURONORM 179-85 ?Chemical analysis of ferrous materials - Determinatlon of nitrogen trace amounts) in steels - Spectrophotometrlc method?, prepared by ECISSITC 20 ?Me
8、thods of chemical analysis?; the Secretariat of which is allocated to the Dansk Standardlserlngsrad (DS). It has been submitted to the CEN Formal Vote following the decision Qf the Coordinating Commission (COCOR) of the European Committee for Irqn and Steel Standardization on 1987-11-24/25. It has b
9、een adopted and ratified by CEN BT on 1988-11-05. According to the Common CEN/CENELEC Rules, following countries are bound to implement this European Standard : Austria, Belgium, Denmark, Finland, France, Germany, Greece, Icelind, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Swed
10、en, Switzerland and United Kingdom. Note in clauses 1 and 9 EURONORM shall read EUROPEAN STANDARD 1 a CEN EN*IO*I74 87 W 340Y589 0000203 7 EN 10 179 Page 3 Chemical analysis of ferrous materiais Determinetion of nitmgen (trace amoum) in stoeb Spoctrophotornatric method CONTENTS 1. SCOPE AND FIELD OF
11、 APPLICARON 7. PROCEDURE 2 REFERENCE 7.2 Bknk teat 3. PRINCiPLE 7.4 Detamination 7.1 Test podon 7.3 Preparation of the Stm distillition apparatus 7.5 ktrbfirhmmt Oftbe crtib-h piph 4 REAGENTS 5. APPARATUS 6. SAMPLING 8. EXPRESSION OF RESULTS i. SCOPE AND FIELD OF APPLICATION This EURONORM specifies
12、a method for the rpectrophoto- metric detenninatim of nitrogen in steels. The mahod is primarily intended for the deraminrtioa of toul nitrogen in very low nitrogen non-lY, diluti i + 9 (v/*, houfi the clumn. then AU references to wa, relate to mmonii-fnt water. Am- wuhin( with wlttt frsed rcid mofi
13、a-free warn rhrll k prepired by pucing distiikd wuer CEN EN*LO*Li 89 I 3404587 0000204 7 W is the mwin micrograms, of nitrogen found in the bhk ta solution. m, CEN ENULO*L79 89 W 3909589 0000207 Lt BEST COPY AVAIIABLE EN 10 179 Page 7 9. TESTREPORT The test rcport shin contain tbe following putidin:
14、 (d) any ocmuions not sdid in this EURONORM or MY -. (a) the method of anilysis used by reference to thir EURO- NORM; optional operationa which could have had an influence on the result; (b) the resulu obtained w weil as the form in which thy are (cl any particular details which may have ben noted d
15、uring (e) nec+rsuy for the of the ple; expressed; the determination; (0 the Irbontay and the date of analysis. ANNEX Precision data Planned triais of this method were cmkd out by 7 rnilyru by each analyst on each of 7 samples. From the remiu obtriaed the 95% (2s) 6 deteminations were cUnd out Nondoy
16、 sti Non-doy rtsd Non-doy steel Nondoy nccl Nondoy Itrd Pun iron Nn-rlloy rrod O.OOO9 0.0012 0.00 19 0.0021 0.0032 0.0031 0.W3 0.00033 0.00025 0.00021 0.00029 0.0003 1 0.00026 Repeatability Reproductbiiity nie difference between two singk retuita fouad on idcaticrl material by one analyst using the
17、aune rppurnu withia a short time inmal will excad the wty, r, not IWCC than once in 20 cuer in the nonnd andoorrrctopauion of the method. ne dinaaur ktrrscp hro shgk and indcpadmt tesults found by two opartar mrbg in dinarnt Irboruona on idcnticrl tat mrtrrid w scd tbe nproducibiiity, R, on avayc no
18、t mm than oew in to CIY) in the namal and comct operation of the mctbob I CEN EN*LO*L79 89 W 3404589 0000208 b W . EN 10 179 Page 8 Rubber tubuis nI (I Fig. 1. Cition cxchye cohmui - CEN EN*l,O*l,79 87 m 340L1589 0009209 8 m 4 . 2 94.5 mm ,EN 10 179 Page 9 CEN EN*LO*L77 87 W 3L10i1587 00002LO 4 I EN 10 179 Page 10 I A B k A. B. C. D. E. F. G. H. K. J. L -F
