ISO 6374:1981
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Cryolithe, naturelle et artificielle, et fluorure d’aluminium à usage industriel — Dosage du phosphore — Méthode par spectrométrie d’absorption atomique après extraction
| Published By | Publication Date | Number of Pages |
| ISO | 1981-10 | 8 |
Specifies a method based on the fusion of a test portion with sodium carbonate and boric acid and dissolution in perchloric acid solution, followed by formation of the ammonium molybdophosphate complex and extraction of the complex with isobutyl acetate. The solution is absorbed into an acetylene/dinitrogen monoxide flame and the molybdenum, and hence the phosphorus, is determined by measuring the absorbance of the 379,8 nm line emitted by a molybdenum hollow-cathode lamp.
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