食品科学 ›› 2008, Vol. 29 ›› Issue (3): 383-385.

• 分析检测 • 上一篇    下一篇

用离子色谱法同时测定茶叶中的F-、Cl-、SO42-、NO3-

 石元值, 杨亦扬, 阮建云, 马立峰, 张磊, 韩文炎, 王方   

  1. 中国农业科学院茶叶研究所 农业部茶叶化学工程重点实验室; 中国农业科学院茶叶研究所; 农业部茶叶化学工程重点实验室; 浙江杭州310008; 浙江杭州310008 南京农业大学茶叶研究所; 江苏南京210095;
  • 出版日期:2008-03-15 发布日期:2011-08-24

Simultaneous Analysis of F-、Cl-、SO42-、NO3- in Tea by Ion Chromatography

 SHI  Yuan-Zhi, YANG  Yi-Yang, RUAN  Jian-Yun, MA  Li-Feng, ZHANG  Lei, HAN  Wen-Yan, WANG  Fang   

  1. 1.Key Laboratory of Tea Chemical Engineering, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China; 2.Tea Research Institute of Nanjing Agricultural University, Nanjing 210095, China
  • Online:2008-03-15 Published:2011-08-24

摘要: 利用美国戴安公司免试剂离子色谱系统(ICS-2000系统),采用KOH梯度离子色谱法和抑制电导检测器,建立了同时测定茶叶中F-、Cl-、SO42-、NO3等四种重要的阴离子的分析方法。研究了茶叶中F-、Cl-、SO42-、NO3-四种阴离子的色谱分析条件,建立了8-44-52-8mmol/L的KOH梯度淋洗程序,流速为1.0ml/min。结果表明:该方法回归方程的线性相关系数达到0.9999以上,各组分的检出限在0.01~0.05mg/L之间,回收率在88.6%~107.5%之间。用本方法用于实际茶叶样品中F-、Cl-、SO42-、NO3-等无机酸阴离子的分析,简便、实用,并且快速、准确,所得结果令人满意。

关键词: 离子色谱法, 梯度淋洗, F-、Cl-、SO42-、NO3-, 同时测定

Abstract: An ion chromatographic method for the simultaneous analysisF-、Cl-、SO42-、NO3-in tea samples was developed with ICS-2000 system. Conditions for separation and detection of F-、Cl-、SO42-andNO3-by gradient ion-chromatography with suppressed conductivity detection were studied. The gradient elution procedure was optimized as 8-44-52-8 mmol/L and the flow rate as 1.0 ml/min. It was found that the correlation coefficients of linear regression equations were abover 0.9999, and the detection limits of those anions were in the range of 0.01-0.05 mg/L, the recoveries of the method were between 88.6% to 107.5%. The method could be applied to the analysis of the batch tea samples with satisfactory results and speediness.

Key words: ion-chromatography, gradient elution, F-、Cl-、SO42-、NO3-, simultaneous analysis