食品科学 ›› 2004, Vol. 25 ›› Issue (11): 259-263.

• 分析检测 • 上一篇    下一篇

茶叶中有害金属元素的快速检测技术研究

 袁建, 鞠兴荣, 汪海峰, 沈崇钰, 蒋原   

  1. 南京财经大学食品科学与工程学院,江苏省出入境检验检疫局
  • 出版日期:2005-11-15 发布日期:2011-10-24

Studies on Techniques of Rapid Determining Heavy Metals in Tea-leaves

 YUAN  Jian, JU  Xing-Rong, WANG  Hai-Feng, SHEN  Chong-Yu, JIANG  Yuan   

  1. 1.College of Food Science and Engineering, Nanjing University of Finance and Economics;2.Jiangsu Province Import and Export Commodity Inspectionand Quarantine Bureau
  • Online:2005-11-15 Published:2011-10-24

摘要: 本文以Cu、Pb为研究对象,通过对主要影响因素:酸浓度,提取时间,提取温度等进行了双因素试验和正交试验,探讨了利用酸提取茶叶中重金属元素-原子吸收测定的快速检测方法。结果表明,采用2mol/L的盐酸在70℃时浸泡60 min提取茶叶中重金属元素,Cu的提取率为96.7%、Pb的提取率为93.2%。与传统的预处理技术对比表明,采用酸提取技术具有较高的提取效率,方法简便,快速。

关键词: 茶叶, 酸提取, 重金属元素, 快速检测

Abstract: The method of rapid determining heavy metals in tea-leaves by HCl-extraction-AAS was studied in this paper. Bythe double factors experiment and orthogonal test, the effects of extraction solvent, time, and temperature on metal recoverieswere investigated in detail to obtain optimum conditions. The results showed that optimum extraction conditions were 70℃,2mol/Lfor 60 min. The percent recovery of cuprum in tea samples was more than 96%, and the percent recovery of lead in teasamples was more than 93%. The analytical results obtained by present method agreed well with the reference results obtainedby traditional methods.

Key words: tea-leave, acid-extracted, heavy metal, rapid determination