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.Ca...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.展开更多
文摘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.
