Portable Spectroscopy with Movable Light Source for Rapid Liquid Sensing via Optical Light Propagation

Abstract

Ultraviolet-Visible (UV-VIS) spectroscopy measures light absorption intensity in a sample solution. This technique operates within the UV-Visible wavelength range. UV-VIS spectroscopy analyses samples using light within the ultraviolet and visible wavelength ranges. This method is non-invasive and simpler than other techniques. However, current spectrometers are often less sensitive to low concentration samples, bulky and not portable. Therefore, the aim of this research is to incorporate a motorized XY axis into the system as well as focusing on designing a portable Arduino-based spectroscopy system for liquid solutions. The spectroscopy setup includes stepper motors, gears, pulleys, an XY axis system, light source, Arduino and light sensor. The XY axis table is designed to adjust the optical light's position which enhances the sensor's sensitivity. The dimensions of each component are measured. A 3D modelling is used to design the motorized XY axis table. The proposed design is small, with dimensions of 16.5 cm (L) x 14 cm (W) x 13 cm (H). The reliability of the proposed spectroscopy system is evaluated using Kelulut Honey. The obtained results are then analyzed. In conclusion, the proposed spectroscopy system features a motorized XY mechanism, compact and portable.