Determination of halogens in marine algae by use of an ion-selective electrode

Abstract

A method for determining the concentrations of chloride, iodide and ether-extractable bromide in marine algae is described. Alkali fusion and ashing of the dry algal tissue or an ether extract of the algal tissue affords aqueous solutions of the total and organic solvent soluble halides, respectively, which are subsequently determined by argentimetric titration using an iodideselective electrode. The accuracy of the procedure is established by the analysis of standard compounds and the simplicity, reliability and convenience of the method are confirmed by the analysis of eleven species of marine algae to determine their halogen contents.