【Abstract】 The low pressure ion chromatography has been developed for the determination of the concentration of Na +、NH + 4、K +、Ca 2+ 、Mg 2+ 、Cl -、SO 2- 4 and PO 3- 4 in the extracts of flower tea、red tea and green tea.Calibrations were linear (r 2>0.996) for eight ions,with RSD s of less than 2%.The recovery of the method was between 95～106% for these ions and the lowest detection limit was less than 1.0×10 -6 g/ml,Results indicate that the developed low pressure ion chromatography assay is fine and accurate for determination of the inorganic ions in the tea eluent.更多还原