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- Title
A novel detector using a fluorescent sensor array and discrimination of pesticides.
- Authors
Lei, Jincan; Hou, Changjun; Huo, Danqun; Luo, Xiaogang; Li, Yanjie; Fa, Huanbao; Zhao, Shixian; Wu, Huixiang
- Abstract
A novel, simple, and rapid detector using a fluorescent sensor array for discrimination and quantification of different concentrations (ppb level) of pesticides was proposed in this paper. Employing porphyrin, porphyrin derivatives, and chemically responsive dyes as the sensing elements, the developed sensor array based on a cross-responsive mechanism showed a unique pattern of fluorescence changes upon the reaction that lasted just 10 min. The eigenvalues from raw fluorescence spectra were analyzed via a pattern recognition algorithm, including hierarchical cluster analysis (HCA), principal component analysis (PCA), and back-propagation neural network (BPNN). The results showed that HCA, which were used to assess the feasibility and effectiveness of discrimination of the fluorescent sensor array, revealed a distinct separation between different pesticides. PCA and BPNN were used for automatically predicting the concentration of pesticides, and the recovery was 91.29-109.81 % while the lowest relative standard deviation was up to 3.12 %. It indicates a detector based on the fluorescent sensor array is a rapid and feasible sensing platform for the discrimination and quantitative analysis of pesticides, and also shows the possibilities in the related fields of pesticides identification and detection.
- Subjects
PESTICIDE analysis; CHEMICAL derivatives; PORPHYRINS; SENSOR arrays; CHEMICAL detectors; FLUORESCENCE spectroscopy; PATTERN recognition systems
- Publication
Research on Chemical Intermediates, 2016, Vol 42, Issue 10, p7359
- ISSN
0922-6168
- Publication type
Article
- DOI
10.1007/s11164-016-2541-8