ISO 1952:1976
Brown coals and lignites; Method of extraction for the determination of sodium and potassium soluble in dilute hydrochloric acid

Standard No.

ISO 1952:1976

Release Date

1976

Published By

International Organization for Standardization (ISO)

Status

Withdraw 2008-09

Replace By

ISO 1952:2008

Latest

ISO 1952:2008

Scope

The sample of brown coal or lignite is extracted with boiling 0,005 N hydrochloric acid and the extract centrifuged. The sodium and potassium in solution are determined by any precise analytical method (for example, gravimetric method or flame photometric method).

ISO 1952:1976 history

• 2008 ISO 1952:2008 Solid mineral fuels - Determination of extractable metals in dilute hydrochloric acid
• 1976 ISO 1952:1976 Brown coals and lignites; Method of extraction for the determination of sodium and potassium soluble in dilute hydrochloric acid