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	毛细管电泳法间接测定茶水、矿泉水中金属离子
	王清萍 ; 陈国南 ; 林金明 ; WANG Qing-ping ; CHEN Guo-nan ; LIN Jin-Ming
	2010-06-07 ; 2010-06-07
关键词	毛细管电泳 间接检测 金属离子 capillary electrophoresis indirect UV detection metal ion O658.9
其他题名	Separation and Determination of Some Metal Ions in Tea and Mineral Water Using Capillary Electrophoresis
中文摘要	采用毛细管电泳间接紫外检测技术测定了茶水、矿泉水中金属离子的含量.研究了电泳液组成和最佳实验条件.结果表明:采用pH=4.82含有浓度为6.0 mmol/L咪唑的乙酸缓冲液作为电泳液,压力进样(30 mbar×5 s),未涂层石英毛细管柱75μm×50 cm,分离电压12 kV,检测波长210 nm,柱温为25℃实验条件下,6 min内实现K+、Ca2+、Na+、Mg2+、Zn2+5种离子的分离和测定.保留时间的相对标准偏差(RSD)小于0.5%,峰面积RSD小于5%(n=7),最低检测限依次为0.002、0.001、0.001、0.010和0.050 mg/L.该方法用于茶水、矿泉水中金属离子含量的测定,回收率95.6%~108.6%,结果良好.; Capillary zone electrophoresis(CZE) was used to determine metal ions in Longjing Tea and Baiyan mineral water.6 mmol/L imidazol solution was used as the background electrolyte and 0.2 mol/L acetic acid was used as the selectivity improvement reagent.Under conditions of pH 4.82,12 kV separation voltage,25 ℃ column temperature and indirect UV(210 nm) detection,K+,Ca2+,Na+,Mg2+ and Zn2+ were separated and determined within only 6 min.The relative standard deviations for retention times and peak areas were less than 0.5% and 5%(n=7),respectively.The detection limits of K+,Ca2+,Na+,Mg2+ and Zn2+ were 0.002,0.001,0.001,0.010 and 0.050 mg/L respectively.The recoveries of the metal ions in real samples were in the range of 95.6%~108.6%.; 福建省自然科学基金资助项目(2007J0130); 福州大学人才基金
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/40589]
专题	清华大学
推荐引用方式 GB/T 7714	王清萍,陈国南,林金明,等. 毛细管电泳法间接测定茶水、矿泉水中金属离子[J],2010, 2010.
APA	王清萍,陈国南,林金明,WANG Qing-ping,CHEN Guo-nan,&LIN Jin-Ming.(2010).毛细管电泳法间接测定茶水、矿泉水中金属离子..
MLA	王清萍,et al."毛细管电泳法间接测定茶水、矿泉水中金属离子".(2010).

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