EN 10177:2019

SLOVENSKI STANDARD
01-september-2019
Nadomešča:
SIST EN 10177:1998
Jeklo - Določevanje kalcija - Metoda s plamensko atomsko absorpcijsko
spektrometrijo (FAAS)
Steels - Determination of calcium content - Flame atomic absorption spectrometric
method (FAAS)
Stahl - Bestimmung des Calciumgehalt - Flammenatomabsorptionsspektrometrisches
Verfahren (FAAS)
Aciers - Détermination de la teneur en calcium - Méthode par spectrométrie d'absorption
atomique dans la flamme (SAAF)
Ta slovenski standard je istoveten z: EN 10177:2019
ICS:
77.040.30 Kemijska analiza kovin Chemical analysis of metals
77.080.20 Jekla Steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 10177
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2019
EUROPÄISCHE NORM
ICS 77.040.30 Supersedes EN 10177:1989
English Version
Steels - Determination of calcium content - Flame atomic
absorption spectrometric method (FAAS)
Aciers - Détermination de la teneur en calcium - Stahl - Bestimmung des Calciumgehalt -
Méthode par spectrométrie d'absorption atomique Flammenatomabsorptionsspektrometrisches
dans la flamme (SAAF) Verfahren (FAAS)
This European Standard was approved by CEN on 22 April 2019.

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 alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC 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
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10177:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 4
5 Reagents . 4
6 Apparatus . 5
6.1 Ordinary laboratory apparatus . 5
6.2 Atomic absorption spectrometer . 6
6.2.1 General . 6
6.2.2 Minimum precision . 6
6.2.3 Additional performance requirements . 6
7 Sampling . 6
8 Procedure. 6
8.1 Test portion . 7
8.2 Blank test . 7
8.3 Determination . 7
8.3.1 Preparation of the test solution . 7
8.3.2 Treatment of the test solution . 7
8.3.3 Preparation of the calibration solutions . 7
8.3.4 Adjustment of the atomic absorption spectrometer . 8
8.3.5 Spectrometric measurements . 9
9 Expression of results . 10
9.1 Use of the calibration curve . 10
9.2 Use of bracketing method . 10
10 Test report . 10
Annex A (informative) Precision . 11
Bibliography . 12

European foreword
This document (EN 10177:2019) has been prepared by Technical Committee CEN/TC 459 “ECISS -
European Committee for Iron and Steel Standardization” , the secretariat of which is held by AFNOR.
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 December 2019, and conflicting national standards
shall be withdrawn at the latest by December 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 10177:1989.
In comparison with EN 10177:1989, the following significant technical changes were made:
— Clause 1: limits of the scope changed;
— Normative references: revised;
— Clause 4: possibility for using aqua regia for the dissolution and other suitable radiation sources
added;
— Clause 5: preparation of iron base solution added;
— 8.3: details regarding the preparation of the test solution added
— 8.3.3: calibration solutions expanded;
— 8.3.5 and Clause 9: bracketing method for the spectrometric measurements added;
— Clause 10: editorially updated;
— Bibliography: added.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

Through its subcommittee SC 2 “Methods of chemical analysis for iron and steel” (secretariat: SIS)
1 Scope
This document specifies a flame atomic absorption spectrometric method (FAAS) for the determination
of calcium content in non-alloy and low alloy steels.
The method is applicable to calcium contents between 4 µg/g and 120 µg/g.
The method can be adapted to higher calcium contents by changing the test portion or the dilution
process, provided the criteria in 6.2.2 and 6.2.3 are still met.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
EN ISO 648, Laboratory glassware — Single-volume pipettes (ISO 648)
EN ISO 1042, Laboratory glassware — One-mark volumetric flasks (ISO 1042)
EN ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical
composition (ISO 14284)
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
4 Principle
Dissolution of a test portion in hydrochloric acid followed by oxidation with nitric acid.
NOTE 1 Aqua regia can be used for simultaneous dissolution and oxidation of the test portion.
Addition of a solution of potassium chloride and nebulization of the test solution into an
acetylene/nitrous oxide flame of an atomic absorption spectrometer.
NOTE 2 Potassium chloride is added to suppress ionization of calcium.
Spectrometric measurement of the atomic absorption of the 422,7 nm spectral line emitted by a calcium
hollow-cathode lamp.
NOTE 3 Other suitable radiation sources can also be used, provided the criteria in 6.2.2 and 6.2.3 are still met.
5 Reagents
During the analysis, use only reagents of recognized analytical grade and only distilled water or water
of equivalent purity.
The following concentrations and amounts can be modified, provided the changes are taken into
account in 8.3 and Clause 9.
5.1 Pure iron.
5.2 Hydrochloric acid solution, 1 + 1.
Add 500 ml of hydrochloric acid (ρ = 1,19 g/ml, approximately) to 500 ml of water and mix.
5.3 Nitric acid solution, 4 + 6.
Add 400 ml of nitric acid (ρ = 1,40 g/ml, approximately) to 600 ml of water and mix.
5.4 Potassium chloride solution, 190 g/l.
5.5 Calcium standard solution, 1 g/l.
Weigh (2,500 ± 0,001) g of pure calcium carbonate, dried at 105 °C and transfer into glassware of
suitable size. Add 20 ml of water and then, slowly, 20 ml of hydrochloric acid (5.2).
When dissolved, dilute to 100 ml approximately with water and transfer the solution quantitatively into
a 1 000 ml one-mark volumetric flask. Dilute to the mark with water and mix.
1 ml of this solution contains 1 mg of calcium.
5.6 Calcium standard solution, 0,02 g/l.
Transfer 5,0 ml of calcium standard solution (5.5) into a 250 ml one-mark volumetric flask. Dilute to the
mark with water and mix.
Prepare this solution immediately prior to use.
1 ml of this solution contains 0,02 mg of calcium.
5.7 Calcium standard solution, 0,002 g/l.
Transfer 20,0 ml of calcium standard solution (5.6) into a 200 ml one-mark volumetric flask. Dilute to
the mark with water and mix.
Prepare this solution immediately prior to use.
1 ml of this solution contains 0,002 mg of calcium.
5.8 Iron base solution, 50 g/l.
Weigh, to the nearest 0,01 g, 10,00 g of pure iron (5.1) and transfer into a heat-resistant glassware of
suitable size. Add 100 ml of hydrochloric acid (5.2), cover the glassware with a watch glass and heat
gently until the reaction ceases. Oxidize with 25 ml of nitric acid (5.3) and then boil the solution for
5 min to remove nitrogen oxides.
Allow to cool and transfer the solution quantitatively into a 200 ml one-mark volumetric flask.
Add 2,5 ml of potassium chloride (5.4), dilute to the mark with water and mix.
6 Apparatus
6.1 Ordinary laboratory apparatus
All volumetric glassware shall be class A, in accordance with EN ISO 648 or EN ISO 1042, as
appropriate.
All glassware shall be washed in hydrochloric acid (5.2) and then in water. The quantity of calcium
present in the glassware and the volumetric flasks can be checked by measuring the absorption of
distilled water introduced in the glassware after the acid washing.
6.2 Atomic absorption spectrometer
6.2.1 General
The spectrometer shall be equipped with a calcium hollow-cathode lamp or other suitable radiation
source and supplied with acetylene and nitrous oxide sufficiently pure to give a steady clear fuel-lean
flame, free from water and oil, and free from calcium.
The atomic absorption spectrometer used will be satisfactory if, after optimization according to 8.3.4,
the limit of detection and characteristic concentration are in reasonable agreeme
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