ISO/PRF 6791

Under development (Edition 2, 2026)

This draft is in the approval phase.

Will replace ISO 6791:1981

Abstract

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.

General information

Status
: Under development

Publication date
: 2026-11

Stage
: Proof sent to secretariat or FDIS ballot initiated: 8 weeks [50.20]
Edition
: 2

Number of pages
: 5
Technical Committee :
ISO/TC 226

ICS :
71.100.10
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