摘要
文章研究目的在于用遗传神经网络模型(GANN模型)快速优化水样中十溴联苯醚分散液液微萃取的萃取条件。以水样中十溴联苯醚分散液液微萃取的正交试验为训练样本,建立十溴联苯醚分散液液微萃取条件的遗传神经网络模型。比较遗传神经网络模型和BP神经网络模型的学习速度、学习精度及网络泛化能力。采用Matlab遗传算法工具箱运用遗传神经网络模型对影响萃取回收率的因素进行优化求解,获得了水样中十溴联苯醚分散液液微萃取优化后的萃取条件,并进行实验验证。文章建立的遗传神经网络模型得到的预测值与实验值平均偏差为14.41%,R2为0.8887;最佳DLLME萃取条件为10μL四氯乙烯、0.71mL丙酮、pH=5、离子强度为20%NaCl、萃取时间10min;优化后十溴联苯醚分散液液微萃取的萃取回收率和富集因子比优化前分别提高了54%和580。
The study aims to optimize dispersive liquid-liquid microextraction (DLLME)of decabrominated diphenyl ether (BDE-209) in water samples rapidly through genetic algorithm neural network (GANN) model. A GANN model was established based on an orthogonalized experiment of BDE -209 DLLME. Convergence speed,learning precision and generalization were compared between BP neural network model and GANN model. Matlab genetic algorithm toolbox was applied to seek a solution of DLLME optimization,and the optimum DLLME co...
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第10期15-18,共4页
Environmental Science & Technology
基金
973国家重点基础研究发展规划资助项目(2004CB3418501)
关键词
分散液液微萃取
十溴联苯醚
遗传神经网络
dispersive liquid-liquid microextraction (DLLME)
decabrominated diphenyl ether
genetic algorithm neural network(GANN)