ISO 11436:1993

Nickel and nickel alloys — Determination of total boron content — Curcumin molecular absorption spectrometric method

Publication date: Aug 5, 1993

General information

Current stage: 90.93 Effective date: Aug 24, 2020

Originator: ISO

Owner: ISO/TC 155

Type: International Standard

ICS: 77.120.40

Languages: French English

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Status: Published

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Scope

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.

Life cycle

NOW

PUBLISHED
ISO 11436:1993
90.93 Standard confirmed
Aug 24, 2020

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