A selective spectrofluorimetric method for carbendazim determination in oranges involving inclusion-complex formation with cucurbit[7]uril

被引：59

作者：

del Pozo, M. ^{[1
]}

Hernandez, L. ^{[1
]}

Quintana, C. ^{[1
]}

机构：

[1] Univ Autonoma Madrid, Fac Ciencias, Dpto Quim Analit & Anal Instrumental, E-28049 Madrid, Spain

来源：

TALANTA | 2010年 / 81卷 / 4-5期

关键词：

Cucurbit[7]uril; Carbendazim; Supramolecular chemistry; Inclusion complex; Fluorescence detection; FLUORESCENCE ENHANCEMENT; MASS-SPECTROMETRY; BETA-CYCLODEXTRIN; MALE RATS; CUCURBITURIL; HOST; PESTICIDES; DYES; DERIVATIVES; VIOLOGENS;

D O I：

10.1016/j.talanta.2010.02.066

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The increase in fluorescence intensity with respect to carbendazim that occurs as a result of supramolecular-complex formation between carbendazim and cucurbit[7]uril has been studied. This host-guest interaction has been employed to develop a sensitive and selective method for benzoimidazole-type pesticide determination in fruit samples The association constant and stoichiometry of the complex formed are reported herein, and the influence of experimental variables, such as the pH or ionic strength of the solution, on complex formation and the presence of interfering substances is also discussed. Under the optimal conditions found, the developed method allows the detection of carbendazim at a 50 x 10(-9) M level To test the method, matrix solid phase dispersion was employed as a sample preparation method for carbendazim determination in orange samples with an RSD (%) (n = 3) value of 5%. The LOD and LOQ values calculated for real samples were 0 10 and 052 mg/kg, respectively, thus showing that the proposed method is sensitive enough to meet legal requirements (C) 2010 Elsevier B V All rights reserved.

引用

页码：1542 / 1546

页数：5

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