ISO 11436:1993 PDF
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Nickel and nickel alloys — Determination of total boron content — Curcumin molecular absorption spectrometric method
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.
| Edition | 1993 |
|---|---|
| Published Date | 1993 |
| Published By | International Standardization Organisation |
| Page Count | 8 |
