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
离子色谱法出现于70年代中期,近十年来获得了高速发展,已广泛用于各领域。1983年以后出现了一种新型的离子色谱法——取代离子色谱(Replacement Ion Chromatography,RIC),是在常规抑制型离子色谱法的基础上另增加一根离子交换柱(即取代...离子色谱法出现于70年代中期,近十年来获得了高速发展,已广泛用于各领域。1983年以后出现了一种新型的离子色谱法——取代离子色谱(Replacement Ion Chromatography,RIC),是在常规抑制型离子色谱法的基础上另增加一根离子交换柱(即取代柱),来取代被测离子,检测取代离子。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.
文摘离子色谱法出现于70年代中期,近十年来获得了高速发展,已广泛用于各领域。1983年以后出现了一种新型的离子色谱法——取代离子色谱(Replacement Ion Chromatography,RIC),是在常规抑制型离子色谱法的基础上另增加一根离子交换柱(即取代柱),来取代被测离子,检测取代离子。