Development of a Transmission Raman Spectroscope for Chemical Analysis

Abstract

In this research, we have demonstrated the construction of a compact transmission Raman spectroscope that has been developed for determination of chemical analysis. The system consists of a green laser emitting 20 mW of 532 nm radiation used for excitation, a notch filter for blocking light around 532 nm and a portable spectrometer (Avantes, AvaSpec-ULS3648) for detection. Several different samples including both solids (acrylic and polydimethylsiloxane) and liquid (limonene and ethanol) are qualitatively tested using our instrument and the results are in good agreement with literature data. The quantitative analysis of the water-ethanol binary mixture with various volume concentrations (12.5 %, 25.0 %, 37.5 %, 50.0 %, 62.5 %, 75.0 % and 100 %) has also demonstrated. From the results, a reliable Raman detection capability for chemical analysis is readily apparent.