Patent ID: 6030844
Filing Date: 2000-02-29
Classification: G01N,Y10T

Abstract:
A method of pre-treating a sample having metal ions in a volatile alkali, wherein the volatile alkali permeates through a gas-permeable membrane and is dissolved in an absorbent which is isolated from the volatile alkali by the gas-permeable membrane so that the volatile alkali, having been dissolved in the absorbent, is reacted with ions in a first electrolytic solution to form a reaction product, said ions having permeated through a first cation exchange membrane that is in electrical contact with an anode before the volatile alkali is reacted with said ions, and the reaction product then permeates through a second cation exchange membrane positioned in electrical contact with a cathode so that the reaction product is dissolved in a second electrolytic solution for subsequent discharge of the second electrolytic solution in which the reaction product remains dissolved.