1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 11876:2010Hardmetals Determinationof calcium, copper, iron,potassium, magnesium,manganese, sodium, nickel andzinc in cobalt metal powders Flame atomic absorptionspectro
2、metric method (ISO11876:2010)BS EN ISO 11876:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO11876:2010.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/65, Sintered metal components.A list of organizations represented on t
3、his committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 56452 9ICS 77.160Compliance with a British Standard cannot confer immunity fromleg
4、al obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2010.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11876 August 2010 ICS 77.160 English Version Hardmet
5、als - Determination of calcium, copper, iron, potassium, magnesium, manganese, sodium, nickel and zinc in cobalt metal powders - Flame atomic absorption spectrometric method (ISO 11876:2010) Mtaux-durs - Dosage du calcium, du cuivre, du fer, du potassium, du magnsium, du manganse, du sodium, du nick
6、el et du zinc dans les poudres mtalliques de cobalt - Mthode par spectromtrie dabsorption atomique dans la flamme (ISO 11876:2010) Hartmetalle - Bestimmung des Calcium-, Kupfer-, Eisen-, Kalium-, Magnesium-, Mangan-, Natrium-, Nickel- und Zinkgehaltes in Kobalt-Metallpulvern - Verfahren mit Flammen-
7、Atomabsorptionsspektrometrie (ISO 11876:2010)This European Standard was approved by CEN on 14 August 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterati
8、on. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by transla
9、tion under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
10、 Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NO
11、RMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11876:2010: EBS EN ISO 11876:2010EN ISO 11876:2010 (E) 3 Foreword This document (EN ISO 11876:2010) has been prepar
12、ed by Technical Committee ISO/TC 119 “Powder metallurgy“. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2011, and conflicting national standards shall be withdrawn at the latest by Febr
13、uary 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards o
14、rganizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
15、 Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 11876:2010 has been approved by CEN as a EN ISO 11876:2010 without any modification. BS EN ISO 11876:2010ISO 11876:2010(E) ISO 2010 All rights reserved iiiForeword ISO (the I
16、nternational Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee
17、has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnica
18、l standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bod
19、ies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any
20、 or all such patent rights. ISO 11876 was prepared by Technical Committee ISO/TC 119, Powder metallurgy, Subcommittee SC 4, Sampling and testing methods for hardmetals. BS EN ISO 11876:2010BS EN ISO 11876:2010INTERNATIONAL STANDARD ISO 11876:2010(E) ISO 2010 All rights reserved 1Hardmetals Determina
21、tion of calcium, copper, iron, potassium, magnesium, manganese, sodium, nickel and zinc in cobalt metal powders Flame atomic absorption spectrometric method 1 Scope This International Standard specifies a flame atomic absorption spectrometric method to be used for the determination of the mass fract
22、ions of copper, potassium, magnesium, manganese, sodium and zinc in cobalt metal powders in the range of 0,001 % to 0,01 %, calcium in the range of 0,002 % to 0,01 %, and iron and nickel in the range of 0,002 % to 0,05 %. 2 Normative references The following referenced documents are indispensable fo
23、r the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3534-1:2006, Statistics Vocabulary and symbols Part 1: General statistical terms and terms used in p
24、robability 3 Reagents Use only reagents of the highest purity and only double-distilled water or water of equivalent purity. 3.1 Nitric acid, = 1,42 g/ml, diluted 1 + 1. 3.2 Hydrochloric acid, 1,1 g/ml (hydrochloric acid, = 1,19 g/ml, diluted 1 + 1). 3.3 Cesium chloride solution, (20 g/1 000 ml). 3.
25、4 Standard solutions, (1,000 g/1 000 ml) for calibration purposes for each element to be determined. 4 Procedure 4.1 Test portion Weigh, to the nearest 0,001 g, approximately 1 g of the sample. 4.2 Dissolution of the test portion Add 20 ml of nitric acid (3.1) and 10 ml of hydrochloric acid (3.2) an
26、d heat gently until the test portion is completely dissolved. BS EN ISO 11876:2010ISO 11876:2010(E) 2 ISO 2010 All rights reserved4.3 Dilution volume 4.3.1 Add 5 ml of the cesium chloride solution (3.3) and dilute to 100 ml. 4.3.2 Shake the analysed volume with 20 ml of freshwater and filter using a
27、ppropriate filter media over a plug of cotton wool into a 50 ml or 100 ml volumetric flask. Depending on the concentration of the determined elements in the sample and/or the sensitivity of the photometer, the dilution volume may be either 50 ml or 100 ml in volumetric flask. 4.4 Preparation of cali
28、bration and blank solutions 4.4.1 Prepare at least three solutions according to 4.2 with a matrix as similar as possible to the test portion to be analysed but without making up to volume. Then add increasing volumes of property diluted standard solutions of the elements to be determined according t
29、o the concentration ranges to be covered. Make up to 100 ml and mix. 4.4.2 Prepare at least two blank solutions (see 4.4.1) without the addition of the relevant element to be determined. 4.5 Adjustment of the atomic absorption spectrometer SAFETY PRECAUTIONS Follow the manufacturers recommendation o
30、n igniting and extinguishing the flame. Optimize the response of the instrument at the wavelength given for the element to be determined (see Table 1). Preheat the burner for about 5 min and adjust the fuel and correct the burner to obtain maximum absorption while aspirating a calibration solution.
31、Make sure that the absorbance reading is not drifting. Aspirate water and set the initial reading to zero absorbance. Table 1 Parameters for atomic flame absorption Element Wavelength nm Oxidant/fuel Ca 422,7 N2O/acetylene Cu 324,8 air/acetylene Fe 248,3 air/acetylene K 766,5 air/acetylene Mg 285,2
32、N2O/acetylene Mn 279,5 air/acetylene Na 589,0 air/acetylene Ni 232,0 air/acetylene Zn 213,9 air/acetylene NOTE Use slit recommended by the manufacturer. 4.6 Atomic absorbance measurement 4.6.1 Aspirate first the blank solution and then the calibration and test solutions consecutively and record the
33、reading. Aspirate water between each solution. Make at least two measurements for each solution. Solids which build up at the burner slit shall be removed; otherwise they cause a decrease in sensitivity. 4.6.2 Prepare a calibration curve by plotting the obtained absorbance values of the calibration
34、solutions corrected for the blank against the concentration. 4.6.3 Convert the absorbance values of the test solution corrected for the blank to milligrams of the element per litre by means of the calibration curve. BS EN ISO 11876:2010ISO 11876:2010(E) ISO 2010 All rights reserved 35 Expression of
35、results 5.1 Calculation The mass fraction of the element, expressed as a percentage, is given by the following formula: 10 000cVmwhere c is the concentration, in milligrams per litre (mg/l), of the element in the test solution; V is the dilution volume, in millilitres (ml); m is the mass of the test
36、 portion, in grams (g). 5.2 Permissible tolerances The deviations between three independent determinations shall not exceed the values in Table 2. Table 2 Lower and upper limits of mass fraction of the element as a percentage Element Lower limit Upper limit Calcium 0,000 5 % 50 % (CV) 0,010 0 % 20 %
37、 (CV) Copper 0,000 5 % 50 % (CV) 0,010 0 % 20 % (CV) Iron 0,000 5 % 50 % (CV) 0,015 0 % 20 % (CV) Potassium 0,000 5 % 50 % (CV) 0,010 0 % 20 % (CV) Magnesium 0,000 5 % 50 % (CV) 0,010 0 % 20 % (CV) Sodium 0,000 5 % 50 % (CV) 0,005 0 % 20 % (CV) Nickel 0,000 5 % 50 % (CV) 0,020 0 % 20 % (CV) Zinc 0,0
38、00 5 % 100 % (CV) 0,010 0 % 10 % (CV) CV: coefficient of variation (see ISO 3534-1:2006, 2.38) 5.3 Final result Report the arithmetic mean of acceptable determinations, rounded to a mass fraction of 0,001 % and a mass fraction of 0,002 %. 6 Test report The test report shall include the following inf
39、ormation: a) a reference to this International Standard; b) all details necessary for identification of the test sample; c) the results obtained; d) all operations not specified in this International Standard, or regarded as optional; e) details of any occurrence which may have affected the result.
40、BS EN ISO 11876:2010ISO 11876:2010(E) 4 ISO 2010 All rights reservedBibliography 1 ISO 5725-1, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions 2 ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Ba
41、sic method for the determination of repeatability and reproducibility of a standard measurement method 3 ISO 5725-3, Accuracy (trueness and precision) of measurement methods and results Part 3: Intermediate measures of the precision of a standard measurement method 4 SO 5725-4, Accuracy (trueness an
42、d precision) of measurement methods and results Part 4: Basic methods for the determination of the trueness of a standard measurement method 5 ISO 5725-5, Accuracy (trueness and precision) of measurement methods and results Part 5: Alternative methods for the determination of the precision of a stan
43、dard measurement method 6 ISO 5725-6, Accuracy (trueness and precision) of measurement methods and results Part 6: Use in practice of accuracy values BS EN ISO 11876:2010This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing B
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