| 响应面法优化提取-原子吸收光谱法测定茶叶中的铅 |
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| 引用本文： | 熊春红,黄晓君,彭康年,谢明勇. 响应面法优化提取-原子吸收光谱法测定茶叶中的铅[J]. 光谱实验室, 2011, 28(6): 2759-2762 |
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| 作者姓名： | 熊春红 黄晓君 彭康年 谢明勇 |
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| 作者单位： | 南昌大学食品科学与技术国家重点实验室 南昌市南京东路235号330047 |
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| 基金项目： | 国家自然科学基金资助项目(20462005) |
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| 摘 要： | 研究超声辅助提取（UAE）快速测定茶叶铅。采用Plackett-Burman设计和响应面法得优化提取条件：200mg样品中加入HNO3∶H2O2（1∶1,V/V）5mL浸泡6min、78℃超声8.4min。对GBW 10016茶叶,该法测定值与标准值符合,加标回收率为96.0%—102.2%,检出限0.041μg.L-1,重复测定的RSD为6.3%。该法测定45个茶鲜叶和10种商品茶,铅含量（干基）在0.39—1.22mg.kg-1之间,与湿法消解（WAD）结果无显著差异。
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| 关 键 词： | 响应面法 提取 原子吸收光谱法 铅 茶叶 |
Determination of Lead in Tea Leaves by AAS-Optimization of Extraction with Response Surface Method |
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| XIONG Chun-Hong,HUANG Xiao-Jun,PENG Kang-Nian,XIE Ming-Yong. Determination of Lead in Tea Leaves by AAS-Optimization of Extraction with Response Surface Method[J]. Chinese Journal of Spectroscopy Laboratory, 2011, 28(6): 2759-2762 |
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| Authors: | XIONG Chun-Hong HUANG Xiao-Jun PENG Kang-Nian XIE Ming-Yong |
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| Affiliation: | XIONG Chun-Hong HUANG Xiao-Jun PENG Kang-Nian XIE Ming-Yong(State Key Laboratory of Food Science and Technology,Nanchang University,Nanchang 330047,P.R.China) |
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| Abstract: | A rapid ultrasound-assisted extraction（UAE） method for the determination of lead in tea leaves was developed.The optimized conditions were obtained by a Plackett-Burman design and response surface methodology as follows：HNO3∶H2O2（1∶1,V/V）5mL was added to 200mg sample by ultrasound extraction for 8.4min at 78.0℃ after soaking 6min.The detection results showed the good agreement with the certified values of GBW 10016.Recovery,detection limit and RSD of replicate measurements were 96.0%—102.2%,0.041μg·L-1 and 6.3%,respectively.The Pb concentrations of 45 fresh tea leaves and 10 branded tea were determined to be 0.39—1.22mg·kg-1 on a dried basis.No significant differences were found between UAE method and WAD method. |
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| Keywords: | Response Surface Method Extraction AAS Lead Tea Leaves |
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