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BS EN ISO 21068-3:2024 Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Determination of nitrogen, oxygen and metallic and oxidic constituents >
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BS EN ISO 21068-3:2024 Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Determination of nitrogen, oxygen and metallic and oxidic constituents, 2024
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- 4.1 General
- 4.2 Combined determination of nitrogen and oxygen by an analyser with thermal conductivity (TC) and infrared (IR) absorption detection [Go to Page]
- 4.3 Determination of total nitrogen content by fusion decomposition [Go to Page]
- 4.4 Determination of total nitrogen content by Kjeldahl distillation [Go to Page]
- 4.5 Calculation of Si3N4 content using total nitrogen content [Go to Page]
- 5.1 General
- 5.2 Principle
- 5.3 Apparatus
- 5.4 Reagents
- 5.5 Sample preparation
- 5.6 Procedure
- 5.7 Measurement
- 5.8 Calculation
- 6.1 Principle
- 6.2 Reagents
- 6.3 Apparatus
- 6.4 Sample preparation
- 6.5 Procedure
- 6.6 Calculation and expression of results
- 7.1 General
- 7.2 Reagents
- 7.3 Procedure
- 7.4 Measurement
- 7.5 Precision
- 8.1 General [Go to Page]
- 8.2 Determination of impurities by XRF (fused bead method)
- 8.3 Determination of impurities by DCArc-OES (direct solid sampling method) [Go to Page]