ISO 1952:1976Withdrawn

Brown coals and lignites — Method of extraction for the determination of sodium and potassium soluble in dilute hydrochloric acid

Charbons bruns et lignites — Méthode d'extraction en vue des dosages du sodium et du potassium solubles dans l'acide chlorhydrique dilué

Abstract / 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).

Life cycle

Replaced by

ISO/DIS 1952Deleted (project abandoned)Coal — Determination of five extractable inorganic ions (Na, Ca, Mg, Fe, Al)International Standard · ISO/TC 27/SC 5 ISO 1952:2008WithdrawnSolid mineral fuels — Determination of extractable metals in dilute hydrochloric acidInternational Standard · Published 18 Aug 2008 · ISO/TC 27/SC 5