SIST ENV 14226:2007

SLOVENSKI STANDARD
SIST ENV 14226:2007
01-januar-2007
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Advanced technical ceramics - Test methods for ceramic powders - Determination of
calcium, magnesium, iron and aluminium in silicon nitride by using flame atomic
absorption spectroscopy (FAAS) or inductively coupled plasma atomic emission
spectroscopy (ICP-AES)
Hochleistungskeramik - Prüfverfahren für keramische Pulver - Bestimmung von Calcium,
Magnesium, Eisen und Aluminium in Siliciumnitrid mittels Flammen-
Atomabsorptionsspektroskopie (FAAS) oder Atomemissionsspektroskopie mit induktiv
gekoppeltem Plasma (ICP-AES)
Céramiques techniques avancées - Méthodes d'essai pour poudres céramiques -
Détermination du calcium, magnésium, fer, et aluminium dans le nitrure par
spectrométrie d'absorption atomique dans la flamme (FAAS) ou par spectrométrie
d'émission atomique avec plasma a couplage inductif (ICP-AES)
Ta slovenski standard je istoveten z: ENV 14226:2002
ICS:
81.060.30 Sodobna keramika Advanced ceramics
SIST ENV 14226:2007 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN PRESTANDARD
ENV 14226
PRÉNORME EUROPÉENNE
EUROPÄISCHE VORNORM
April 2002
ICS 81.060.30
English version
Advanced technical ceramics - Test methods for ceramic
powders - Determination of calcium, magnesium, iron and
aluminium in silicon nitride by using flame atomic absorption
spectroscopy (FAAS) or inductively coupled plasma atomic
emission spectroscopy (ICP-AES)
Céramiques techniques avancées - Méthodes d'essai pour Hochleistungskeramik - Prüfverfahren für keramische
poudres céramiques - Détermination du calcium, Pulver - Bestimmung von Calcium, Magnesium, Eisen und
magnésium, fer, et aluminium dans le nitrure par Aluminium in Siliciumnitrid mittels Flammen-
spectrométrie d'absorption atomique dans la flamme Atomabsorptionsspektroskopie (FAAS) oder
(FAAS) ou par spectrométrie d'émission atomique avec Atomemissionsspektroskopie mit induktiv gekoppeltem
plasma à couplage inductif (ICP-AES) Plasma (ICP-AES)
This European Prestandard (ENV) was approved by CEN on 23 December 2001 as a prospective standard for provisional application.
The period of validity of this ENV is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the ENV can be converted into a European Standard.
CEN members are required to announce the existence of this ENV in the same way as for an EN and to make the ENV available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the ENV) until the final
decision about the possible conversion of the ENV into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. ENV 14226:2002 E
worldwide for CEN national Members.

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ENV 14226:2002 (E)
Foreword
This document ENV 14226:2002 has been prepared by Technical Committee CEN/TC 184 “Advanced
technical ceramics”, the secretariat of which is held by BSI.
This Prestandard includes a Bibliography.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to announce this European Prestandard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
2

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ENV 14226:2002 (E)
1 Scope
This European Prestandard specifies methods for the determination of calcium, magnesium, iron, and
aluminium, using flame atomic absorption spectroscopy (FAAS), or inductively coupled plasma
atomic emission spectroscopy (ICP-AES).
The methods are applicable to the concentration ranges given in clause 3.
2 Normative references
This European Prestandard incorporates, by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text, and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of
these publications apply to this European Prestandard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
ISO 3696, Water for analytical laboratory use - Specification and test methods.
3 Concentration ranges
The method is applicable to concentration ranges for each element as follows:
-6 -6
Calcium 5 × 10 to 500 × 10 (w/w);
-6 -6
Magnesium 5 × 10 to 200 × 10 (w/w);
-6 -6
Iron 5 × 10 to 250 × 10 (w/w);
-6 -6
Aluminium 5 × 10 to 1000 × 10 (w/w).
4 Principle
The test sample is decomposed using either acid pressure digestion, or acid pressure microwave
digestion.
The resulting solution is diluted to a defined volume and nebulization into a flame for FAAS, or into a
plasma, for ICP-AES (see clause 1).
For each element, comparison is made of the recorded absorbance or emitted intensity for a determined
analytical peak with those of a range of solutions of known concentrations.
5 Sampling
Bulk sampling is not within the scope of this European Prestandard and the method starts with a
laboratory sized sample.
3

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ENV 14226:2002 (E)
6 Reagents and materials
6.1 General
All reagents, and substances, shall be of at least analytical grade. Distilled or de-ionised water,
conforming to ISO 3696, shall be used throughout the whole procedure.
6.2 Reagents for preparation
-1
6.2.1 Hydrofluoric acid HF
about 1,16 g ml .
20
-1
6.2.2 Nitric acid 
about 1,4 g ml .
 20
6.3.Reagents for calibration
6.3.1 All reagents shall be of ultra high purity.
-1
6.3.2 Silicon, commercial solution with very low and known impurity levels, concentration 10 gl .
6.3.3 Calcium, commercial solution or solution obtained by the dissolution of a pure chemical product,
-1
concentration 0,1 gl .
6.3.4 Magnesium, commercial solution or solution obtained by the dissolution of a pure chemical
-1
product, concentration 0,1 gl .
6.3.5 Iron, commercial solution or solution obtained by the dissolution of a pure chemical product,
-1
concentration 0,1 gl .
6.3.6 Aluminium, commercial solution or solution obtained by the dissolution of a pure chemical
-1
product, concentration 0,1 gl .
7 Apparatus
7.1 Spectrometer used for FAAS and ICP-AES analysis should comply with the requirements laid
down in ECSC/C 9. The ICP-AES shall be equipped with a nebulization system and torch resistant to
hydrofluoric acid.
o
7.2 Drying oven, capable of being controlled at (110 10) C.
7.3 Desiccator containing effective desiccant.
7.4 Balance, to read to 0,1 mg.
7.5 Sample jar or bag, with a seal.
4

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ENV 14226:2002 (E)
7.6 50 ml volumetric flasks, resistant to hydrofluoric acid (e.g. polypropylene, PTFE).
7.7 Vessels, resistant to hydrofluoric acid, of at least 30 ml capacity, and suitable for operation at
o
(170  15) C for 15 h, for use with (7.8).
7.8 Acid pressure dige
...