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分子印跡固相萃取液相色譜聯用法測定3種新煙堿類農藥的殘留

2014-07-10 21:34:15楊東冬等
分析化學 2014年6期

楊東冬等

摘 要 以噻蟲啉為模板分子制備了對吡蟲啉、氯噻啉、噻蟲啉具有特異性識別的分子印跡聚合物。功能單體與模板分子最佳摩爾比為:

3.8 實際樣品分析

為了評價制備的MIP小柱的實際應用能力,

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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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