Absorption Spectra of Ethanol and Water Using a Photothermal Lens Spectrophotometer. Issue 7 (July 2018)

• Record Type: Journal Article
• Authors: Cabrera, Humberto; Akbar, Jehan; Korte, Dorota; Ashraf, Imrana; Ramírez-Miquet, Evelio E.; Marín, Ernesto; Niemela, Joseph
• Is Part Of: Applied spectroscopy. Volume 72:Issue 7(2018)
• Page Start: 1069
• Page End: 1073
• Publication Date: 2018-07
• Subjects: Thermal lens spectrometry -- TLS -- absorption of water -- absorption of ethanol -- vibration overtones; Spectrum analysis -- Periodicals; 543.505
• DOI: 10.1177/0003702818759073
• Languages: English
• ISSNs: 0003-7028

Abstract

In this work we report on the absorption spectra of ethanol and water in the region 430–700 nm using a homemade halogen lamp-based photothermal lens spectrophotometer with a multipass probe-beam configuration. The spectra also include well resolved, higher absorption overtones. The instrument achieves high sensitivity due to multiple reflections within the optical cavity containing the sample. Finally, an Arduino board was used for collecting and digitizing the signal, thus enabling a more compact device.