This standard was last reviewed and confirmed in 2022. Therefore this version remains current.
Applicable to products having boron oxide contents of more than 0.0006 % (m/m). With sufficiently sensitive apparatus, the lower limit of application may be extended to 0.00008 % (m/m). The test portion is dissolved in phosphoric acid. Separation of the boron by distillation as methyl borate. Formation of a red coloured complex between the boron and the curcumin reagent at pH 7. Spectrophotometric measurement of the complex at a wavelength of about 550 nm.
Status: PublishedPublication date: 1973-12
Edition: 1Number of pages: 5
Technical Committee: ISO/TC 226 Materials for the production of primary aluminium
- ICS :
- 71.100.10 Materials for aluminium production
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|std 2 40||Paper|
A standard is reviewed every 5 years
Stage: 90.93 (Confirmed)
Corrigenda / AmendmentsPublished
ISO 2865:1973/Cor 1:1991
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