Characterization of ethanol concentrations at ultraviolet wavelength region

Abstract

This paper presents the measurement of optical absorption spectrum for different concentrations of ethanol at measured using portable spectroscopy setup from Avantes. ItHalogen light source and spectrometer. The light source can deliver a continuous broad spectrum ranging from 0.2 to 2.5 µm and the spectrometer has the detection range of µm. Several mixtures of ethanol in de concentrations of 0%, 0.1%, 0.5%, 1.0%, 2.5%, 5%, 10%, 15%, 25%, 50% and 100 vol%.The baseline of the absorption spectrum was being analyzed and corrected using MATLAB software. From the results, the spectroscopy setup was successfully detecting ethano concentration from 2.5-100vol%. However, only concentration range from 2.5 shown 99% of fulfilment towards the Beer's Lambert Law. Halogen light source and spectrometer. The light source can deliver a continuous broad spectrum ranging from 0.2 to 2.5 µm and the spectrometer has the detection range of µm. Several mixtures of ethanol in de-ionized water were prepared with vario concentrations of 0%, 0.1%, 0.5%, 1.0%, 2.5%, 5%, 10%, 15%, 25%, 50% and 100 vol%.he baseline of the absorption spectrum was being analyzed and corrected using MATLAB Halogen light source and spectrometer. The light source can deliver a continuous broad spectrum ranging from 0.2 to 2.5 µm and the spectrometer has the detection range of 0.2-1.1 ionized water were prepared with various concentrations of 0%, 0.1%, 0.5%, 1.0%, 2.5%, 5%, 10%, 15%, 25%, 50% and 100 vol%.he baseline of the absorption spectrum was being analyzed and corrected using MATLAB software. From the results, the spectroscopy setup was successfully detecting ethanol 100vol%. However, only concentration range from 2.5-50vol% has ultraviolet wavelength; spectroscopy; optical absorption; ethanol concentration;Research Article Special Issue M. K. A. Rahman et al.

Quaternary Alloy Quantum Dots as Fluorescence Probes for Total Acidity Detection of Paper-Based Relics

“…The UV absorption peak at 212 and 253 nm are assigned to the K band and B band of pATP respectively, and the two bands are derived from π–π* transition of the conjugated substituted benzene structure of pATP [ 26 ]. The UV absorption spectra indicate that both peaks at 212 and 253 nm gradually reduce with washing times of ethanol, and the absorbance spectrum for the seventh ethanol eluent is almost the same as that of ethanol [ 27 ], indicating that pATP physically absorbed on surfaces of CdZnSeS-pATP QDs could be removed through ethanol washing. The UV spectrum for the residue of the pATP treated CdZnSeS-OA after ethanol washing, CdZnSeS-OA and pATP, are shown in Figure S2 .…”

The influence of water and ethanol adsorption on the optical blinking in InGaN quantum wells

“…We grouped our recordings in 30 s chunks for analysis (the short initial lamp induced transients were cut away). Ultraviolet (UV) Hg lamps were used as excitation light (365 nm and 405 nm emission lines), the thickness of the liquid layer was 500 µm, the absorption spectra of water and ethanol in those two UV ranges is nearly identical [15]. Since the main purpose of the investigation was to detect the ILCs changes caused by the presence of liquids, all our observations were made using the sole 365 nm excitation light that excites both the InGaN layer and the GaN layer [1].…”