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。
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.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2004年第11期259-263,共5页
Food Science
基金
江苏省十五科技攻关课题(BE2003345)
