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ISO/PRF 6791

Carbonaceous materials for the production of aluminium — Pitch for electrodes — Determination of contents of quinoline-insoluble material

General information

Current stage: 50.00 Effective date: Jul 17, 2026

Originator: ISO

Owner: ISO/TC 226

Type: International Standard

ICS: 71.100.10

Scope

Specifies a conventional gravimetric method for the determination. A test portion ist reated with quinoline in a beaker at 70 to 80 °C for 15 to 20 min. Then the dissolved test portion and the residue are brought to a Hartley funnel fitted with a filter pad, and are filtered. The washed and dried residue on the filter pad is weighed.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 6791:1981

NOW

PROJECT
ISO/PRF 6791
50.00 Final text received or FDIS registered for formal approval
Jul 17, 2026