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分子印迹固相萃取液相色谱联用法测定3种新烟碱类农药的残留

2014-07-10杨东冬等

分析化学 2014年6期
关键词:吡虫啉印迹分析化学

杨东冬等

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:

3.8 实际样品分析

为了评价制备的MIP小柱的实际应用能力,

References

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Determination of Three Neonicotinoid Pesticides Residues by

High Performence Liquid Chromatography with

Molecularly Imprinting Solid Phase Extraction

YANG DongDong, CONG LuJing, TIAN MingMing, WANG MingHua*

(College of Plant Protection, Nanjing Agricultural University,

Jiangsu Key Laboratory of Pesticide Science, Nanjing 210095, China)

Abstract 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 (MIPSPE) 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 MIPSPE was used to analyses the real samples, the result was satisfied.

Keywords Molecularly imprinted polymers; Thiacloprid; Imidacloprid; Imidaclothiz; Solid phase extraction; High performence liquid chromatography

(Received 11 March 2014; accepted 25 March 2014)

YANG DongDong, CONG LuJing, TIAN MingMing, WANG MingHua*

(College of Plant Protection, Nanjing Agricultural University,

Jiangsu Key Laboratory of Pesticide Science, Nanjing 210095, China)

Abstract 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 (MIPSPE) 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 MIPSPE was used to analyses the real samples, the result was satisfied.

Keywords Molecularly imprinted polymers; Thiacloprid; Imidacloprid; Imidaclothiz; Solid phase extraction; High performence liquid chromatography

(Received 11 March 2014; accepted 25 March 2014)

YANG DongDong, CONG LuJing, TIAN MingMing, WANG MingHua*

(College of Plant Protection, Nanjing Agricultural University,

Jiangsu Key Laboratory of Pesticide Science, Nanjing 210095, China)

Abstract 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 (MIPSPE) 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 MIPSPE was used to analyses the real samples, the result was satisfied.

Keywords Molecularly imprinted polymers; Thiacloprid; Imidacloprid; Imidaclothiz; Solid phase extraction; High performence liquid chromatography

(Received 11 March 2014; accepted 25 March 2014)

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