A Molecular-Imprinted Sensor for Trace Detection of Gibberellin Based on Ferrocenecarboxylic Acid Multiply Marked Dendrimer
10.3724/SP.J.1096.2014.30855
- VernacularTitle:基于二茂铁甲酸多重标记的树枝状大分子放大效应的赤霉素分子印迹电化学传感器
- Author:
Cong FU
;
Jianping LI
- Publication Type:Journal Article
- Keywords:
Multi-labeling;
Dendrimer;
Gibberellin acid 3;
Molecularly imprinted;
Ferrocenecarboxylic Acid;
Poly( diethylene-triaminepenta-acetic acid)-glycol ester
- From:
Chinese Journal of Analytical Chemistry
2014;(3):315-319
- CountryChina
- Language:Chinese
-
Abstract:
A novel strategy employing dendrimer to multi-label the template molecule to improve the sensitivity of molecularly imprinted electrochemical sensor was proposed. The determination relies on a competition reaction between poly ( diethylene-triaminepenta-acetic acid )-glycol ester ( PDTPA )-ferrocene-carboxylic acid ( FcA ) labeled gibberellins acid 3 ( GA3 ) and GA3 in the sample. Since one cavity corresponds with multiple FcA, instead of only one FcA, the intensity of the detecting signal was greatly enhanced, so was the sensitivity of the sensor. Experimental results showed that the molecularly imprinted electrochemical sensor was sensitive to GA3 detection at a concentration from 2. 0í10-9 to 1. 0í10-7 mol/L, with a detection limit of 9. 3í10-10 mol/L. In addition, the sensor had good reproducibility and its feasibility was verified in the analysis of series of real beer samples.
