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.
OBJAVLJEN
ISO 6791:1981
PROJEKAT
ISO/PRF 6791
50.20
Početak postupka odobravanja definitivnog teksta nacrta standarda
15. 9. 2026.
Da biste videli ceo sadržaj, morate se registrovati ili prijaviti pomoću korisničkog imena koje već imate.