ISO 11436:1993
Nickel and nickel alloys — Determination of total boron content — Curcumin molecular absorption spectrometric method
Nickel and nickel alloys — Determination of total boron content — Curcumin molecular absorption spectrometric method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 8
- Дата публикации:
- 5 августа 1993 г.
- Издание:
- ISO IS 11436 edition 1 version 1
- ICS:
- 77.120.40
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.
Abstract
Похожие стандарты
Упомянутые в описании и другие стандарты ISO