Ion exchange method for rapid determination of alkalinity of water-soluble tea ash containing high levels of manganese.
An ion exchange method to determine the alkalinity of water-soluble tea ash containing high levels of manganese is described. A chromatographic column containing a strong cation exchange resin (20-50 mesh) in Na+ form, with a bed volume of 5 mL is used. The present ion exchange method is compared to pH titrations and also to the official AOAC methods (31.012, 31.015, 31.016). Results with the new method are accurate and precise.
D002852:Chromatography, Ion Exchange; D006863:Hydrogen-Ion Concentration; D008345:Manganese / Q000032:analysis*; D012995:Solubility; D013662:Tea / Q000032:analysis*; D014867:Water
D013662:Tea; D014867:Water; D008345:Manganese