摘要
以噻虫啉为模板分子制备了对吡虫啉、氯噻啉、噻虫啉具有特异性识别的分子印迹聚合物。功能单体与模板分子最佳摩尔比为:n(噻虫啉)∶n(甲基丙烯酸)∶n(苯乙烯)=1∶4∶4。动态吸附和选择性吸附表明,此印迹聚合物能够对目标物快速吸附,且有很好的选择性。Scatchard分析表明,此印迹聚合物对吡虫啉、氯噻啉、噻虫啉最大吸附量分别为31.7,36.7和45.3 mg/g。用此印迹聚合物作为固相萃取吸附剂处理加标样品,目标物的回收率为80.2%-98.8%,RSD为1.2%-4.5%(n=3)。本方法用于实际样品检测,获得了满意的结果。
A molecularly imprinted polymer( MIP) for the selective solid phase extraction of imidacloprid, imidaclothiz,thiacloprid was synthesized by polymerization for 24 h using thiacloprid as template. Dynamic adsorption and selective adsorption test showed that the MIP could quickly adsorb the imidacloprid, imidaclothiz,thiacloprid,with good selectivity for targets. The maximum static adsorption capacity of MIP was 31. 7,36. 7 and 45. 3 mg / g,respectively. A molecularly imprinted solid phase extraction( MIP-SPE) was developed to separate,clean up and enrich the thiacloprid,imidacloprid and imidaclothiz residue in paddy water,soil,rice,tomato,cucumber. The average recoveries were 80. 2%- 98. 8%,with relative standard deviation of 1. 4%- 4. 5%. The MIP-SPE was used to analyses the real samples,the result was satisfied.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2014年第6期872-877,共6页
Chinese Journal of Analytical Chemistry
基金
国家公益性行业(农业)科研专项经费项目(No.201203022)
关键词
分子印迹聚合物
噻虫啉
吡虫啉
氯噻啉
固相萃取
高效液相色谱
Molecularly imprinted polymers
Thiacloprid
Imidacloprid
Imidaclothiz
Solid phase extraction
High performence liquid chromatography