NF EN ISO 14720-2
Testing of ceramic raw and basic materials - Determination of content of sulfur in powders and granules of non-oxidic ceramic raw and basic materials - Part 2 : inductively coupled plasma optical emission spectrometry (ICP/OES) or ion chromatography after burning in an oxygen flow
This part of ISO 14720 defines a method for the determination of sulfur in powdered and granular non-oxidic ceramic raw materials and materials, which are completely oxidized at a higher temperature in an oxygen atmosphere, e.g. carbon and graphite materials. For materials which are not completely oxidizable under these conditions, it is possible to determine sulfur that can be released under these conditions, e.g. the adherent sulfur. This part of ISO 14720 is applicable for materials with mass fractions of sulfur ≤ 10 % and mass fractions of ash < 20 %, The defined method is limited for materials with mass fractions of barium < 10 mg/kg, because the sulfur bonded in barium sulfate is not detectable with this method. For the lower detection limit of this method, a mass fraction of sulfur of 0,5 mg/kg in the case of inductively coupled plasma optical emission spectrometry (ICP/OES) and 5 mg/kg in the case of ion chromatography (IC) has to be considered as a recommended value.
This part of ISO 14720 defines a method for the determination of sulfur in powdered and granular non-oxidic ceramic raw materials and materials, which are completely oxidized at a higher temperature in an oxygen atmosphere, e.g. carbon and graphite materials.
For materials which are not completely oxidizable under these conditions, it is possible to determine sulfur that can be released under these conditions, e.g. the adherent sulfur.
This part of ISO 14720 is applicable for materials with mass fractions of sulfur ≤ 10 % and mass fractions of ash < 20 %, The defined method is limited for materials with mass fractions of barium < 10 mg/kg, because the sulfur bonded in barium sulfate is not detectable with this method.
For the lower detection limit of this method, a mass fraction of sulfur of 0,5 mg/kg in the case of inductively coupled plasma optical emission spectrometry (ICP/OES) and 5 mg/kg in the case of ion chromatography (IC) has to be considered as a recommended value.
- Avant-proposiv
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1 Domaine d'application1
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2 Références normatives1
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3 Termes et définitions1
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4 Principe2
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5 Interférences2
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5.1 ICP/OES2
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5.2 Chromatographie ionique3
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6 Appareillage3
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7 Réactifs3
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8 Échantillonnage et préparation de l'échantillon4
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9 Préparation4
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9.1 Dispositif de combustion4
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9.2 Oxygène (7.10)4
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9.3 Spectromètre d'émission optique avec plasma induit par haute fréquence (6.7)4
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9.4 Chromatographe ionique (6.8)4
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10 Étalonnage5
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10.1 Spectromètre d'émission optique avec plasma induit par haute fréquence5
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10.2 Chromatographe ionique5
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11 Performance5
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11.1 Détermination de la valeur à blanc5
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11.2 Dosage du soufre5
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12 Calcul et consignation des résultats6
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13 Fidélité6
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13.1 Répétabilité6
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13.2 Reproductibilité6
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14 Rapport d'essai7
- Annexe A (informative) Exemple de dispositif de combustion8
- Annexe B (informative) Exemple de paramètres opérationnels appropriés pour le dosage du soufre par chromatographie ionique9
- Annexe C (informative) Exemple de paramètres opérationnels appropriés pour le dosage du soufre par chromatographie d'émission optique avec plasma induit par haute fréquence10
- Annexe D (informative) Résultats de l'essai interlaboratoires11
- Annexe E (informative) Informations relatives à la validation de l'incertitude de la valeur moyenne14
- Annexe F (informative) Matériaux de référence certifiés commerciaux (MRC)15
- Bibliographie16
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