ISO 11436:1993
Nickel and nickel alloys — Determination of total boron content — Curcumin molecular absorption spectrometric method
| Fecha edición: |
1993-08-05
En Vigor
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|---|---|
| Idiomas disponibles: | Francés, Inglés |
| Resumen: | The principle of the method specified is dissolving a test portion in hydrochloric and nitric acids, decomposing resistant boron compounds (e.g. boron nitrides) by fuming the sample solution with phosphoric and sulfuric acids at not less than 290 °C, forming the boron curcumin complex in a buffered acetic acid and sulfuric acid medium, and measuring the absorbance of the test solution in a molecular absorption spectrometer at 543 nm. Applies to nickel and nickel alloys having a total boron content in the range of 4 g/t to 240 g/t. |
| ICS: | 77.120.40 - Níquel, cromo y sus aleaciones |
| CTN: | ISO/TC 155 - 53216 |
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