An Optical Device Based on a Chemical Chip and Surface Plasmon Platform for 2-Furaldehyde Detection in Insulating Oil

被引:0
|
作者
De Maria, Letizia [1 ]
Arcadio, Francesco [2 ]
Gabetta, Giuseppe [3 ]
Merli, Daniele [4 ]
Alberti, Giancarla [4 ]
Zeni, Luigi [2 ]
Cennamo, Nunzio [2 ]
Pesavento, Maria [4 ]
机构
[1] RSE SpA, Via Rubattino 54, I-20134 Milan, Italy
[2] Univ Campania L Vanvitelli, Dept Engn, Via Roma 29, I-81031 Aversa, Italy
[3] CESI SpA, Via Rubattino 54, I-20134 Milan, Italy
[4] Univ Pavia, Dept Chem, Via Taramelli 12, I-27100 Pavia, Italy
关键词
2-Furaldehyde (2-FAL); molecularly imprinted polymer (MIP); surface plasmon resonance (SPR); plastic optical fiber (POF); optical device; oil-paper insulation monitoring; MOLECULARLY IMPRINTED POLYMERS; RESONANCE SENSOR; SENSITIVITY;
D O I
10.3390/s24165261
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
2-Furaldehyde (2-FAL) is one of the main by-products of the degradation of hemicellulose, which is the solid material of the oil-paper insulating system of oil-filled transformers. For this reason, it has been suggested as a marker of the degradation of the insulating system; sensing devices for 2-FAL analysis in a wide concentration range are of high interest in these systems. An optical sensor system is proposed; this consists of a chemical chip, able to capture 2-FAL from the insulating oil, coupled with a surface plasmon resonance (SPR) probe, both realized on multimode plastic optical fibers (POFs). The SPR platform exploits gold nanofilm or, alternatively, a double layer of gold and silicon oxide to modulate the sensor sensitivity. The capturing chip is always based on the same molecularly imprinted polymer (MIP) as a receptor specific for 2-FAL. The system with the SPR probe based on a gold nanolayer had a higher sensitivity and a lower detection limit of fractions of mu g L-1. Instead, the SPR probe, based on a double layer (gold and silicon oxide), has a lower sensitivity with a worse detection limit, and it is suitable for the detection of 2-FAL at concentrations of 0.01-1 mg L-1.
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页数:18
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