ISO-11436 › Nickel and nickel alloys - Determination of total boron content - Curcumin molecular absorption spectrometric method

ISO-11436 - 1ST EDITION - CURRENT


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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.

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77.120.40 (Nickel, chromium and their alloys)

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Document Number

ISO 11436:1993

Revision Level

1ST EDITION

Status

Current

Publication Date

Aug. 1, 1993

Committee Number

ISO TC 155/SC 3