Performance parameters of standard salt concentration sensitivity and linearity in Refractometers and Genesys 30 Spectrometer UV-Vis

¹ Departement of Science Education, Universitas Negeri Surabaya, Surabaya, Indonesia
² Departement of Biology Education, Universitas Negeri Surabaya, Surabaya, Indonesia
³ Departement of Mathematic, Universitas Negeri Surabaya, Surabaya, Indonesia

^* Corresponding author: mohammadbudiyanto@unesa.ac.id

Abstract

The performance parameters of the sensitivity and linearity of the UV-vis Refractometer and Spectrometer in the standard salt solution test are very simple to do on a simple and inexpensive sample basis. The accuracy of measuring instruments is very important, and the process of checking measuring instruments through trials of salt content is one of the techniques in this study to determine the performance parameters of science laboratory equipment, especially in the use of refractometers and Genesys 30 spectrometer UV-vis. Both of these instruments are available in the Laboratory of the Faculty of Mathematics and Natural Sciences with different specifications in order to select an instrument that has high accuracy based on the characterization of the performance parameters of the Science laboratory equipment with indicators of higher sensitivity and linearity. The output of this research is to provide tool recommendations with high accuracy. Experimental results on samples of five different concentrations of salt solutions showed that the sensitivity and linearity of the spectrometer UV-vis were higher than those of the refractometer, so it can be concluded that to test the concentration of salt content in certain samples, it is better to use a spectrometer UV-vis.