BS EN 725-1:2007
Current
The latest, up-to-date edition.
Advanced technical ceramics. Methods of test for ceramic powders Determination of impurities in alumina
Hardcopy , PDF
English
31-10-2007
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Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents
4.1 General
4.2 Reagents for fusion
4.3 Sulphuric acid-phosphoric acid mixture for acid
dissolution
4.4 Reagents for calibration
5 Apparatus
6 Test sample
7 Decomposition of the test sample
7.1 General
7.2 Fusion
7.3 Acid dissolution
8 Calibration graph
8.1 General
8.2 Fusion
8.3 Acid dissolution
8.4 Drawing the calibration curve
9 Adjustment of the apparatus
9.1 Atomic absorption spectrometer
9.2 Inductively coupled plasma spectrometer
10 Measurements
11 Expression of the results
12 Test report
Annex A (informative) Repeatability and reproducibility
Bibliography
Defines one fusion and one acid dissolution method for the determination of elements of sodium, potassium, iron, silicon, calcium and magnesium present as impurities in alumina using atomic absorption spectroscopy (AAS) or inductively coupled plasma (ICP) spectroscopy.
| Committee |
RPI/13
|
| DevelopmentNote |
Supersedes 93/311578 DC. (08/2005) Supersedes 05/30117337 DC. (10/2007)
|
| DocumentType |
Standard
|
| Pages |
14
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This Part of EN 725 specifies one fusion and one acid dissolution method for the determination of elements of sodium, potassium, iron, silicon, calcium and magnesium present as impurities in alumina using atomic absorption spectroscopy (AAS) or inductively coupled plasma (ICP) spectroscopy. For each element present as impurities, the methods are applicable to the following ranges, calculated as oxides : - Sodium oxide: 20 ppm to 6000 ppm - Potassium oxide: 20 ppm to 100 ppm - Ferric oxide: 20 ppm to 300 ppm - Silica: 50 ppm to 2000 ppm - Calcium oxide: 20 ppm to 700 ppm - Magnesium oxide: 5 ppm to 1000 ppm
| Standards | Relationship |
| I.S. EN 725-1:2007 | Identical |
| DIN EN 725-1:2008-06 | Identical |
| NEN EN 725-1 : 2007 | Identical |
| SN EN 725-1:2007 | Identical |
| UNI EN 725-1 : 2008 | Identical |
| NBN EN 725-1 : 2007 | Identical |
| EN 725-1:2007 | Identical |
| NS EN 725-1 : 2ED 2007 | Identical |
| NF EN 725-1 : 2007 | Identical |
| ISO/IEC 17025:2005 | General requirements for the competence of testing and calibration laboratories |
| ISO 5725-2:1994 | Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method |
| ISO 3696:1987 | Water for analytical laboratory use — Specification and test methods |
| EN ISO 3696:1995 | Water for analytical laboratory use - Specification and test methods (ISO 3696:1987) |
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