Optrode-Assisted Multiparametric Near-Infrared Spectroscopy for the Analysis of Liquids
Anno: 2024
Autori: Delli Santi M.G.; Castrignano S.; Capezzuto M.; Consales M.; Vaiano P.; Cusano A.; Gagliardi G.; Malara P.
Affiliazione autori: Consiglio Nazl Ric CNR, Ist Nazl Ott INO, Via Campi Flegrei 34, I-80078 Pozzuoli, Italy; Univ Sannio, Engn Dept, Optoelect Grp, Cso Garibaldi 107, I-82100 Benevento, Italy.
Abstract: We demonstrate a sensing scheme for liquid analytes that integrates multiple optical fiber sensors in a near-infrared spectrometer. With a simple optofluidic method, a broadband radiation is encoded in a time-domain interferogram and distributed to different sensing units that interrogate the sample simultaneously; the spectral readout of each unit is extracted from its output signal by a Fourier transform routine. The proposed method allows performing a multiparametric analysis of liquid samples in a compact setup where the radiation source, measurement units, and spectral readout are all integrated in a robust telecom optical fiber. An experimental validation is provided by combining a plasmonic nanostructured fiber probe and a transmission cuvette in the setup and demonstrating the simultaneous measurement of the absorption spectrum and the refractive index of water-methanol solutions.
Giornale/Rivista: SENSORS
Volume: 24 (3) Da Pagina: 729-1 A: 729-7
Parole chiavi: fiber optics sensors; lab-on-fiber sensors; portable spectrometers; NIR spectroscopy; multiparametric analysisDOI: 10.3390/s24030729Link per visualizzare la scheda su IsiWeb: Clicca qui
