A Paper-Based Colorimeter using Smartphone Light Sensor Ade Yeti Nuryantini,Umairoh Umairoh, Bebeh Wahid Nuryadin
UIN Sunan Gunung Djati Bandung
Abstract
A paper-based colorimeter for absorbance and concentration measurement of the food coloring dye is proposed. The paper-based colorimeter system consists of a white LED as light source, paper-based cuvette holder, and smartphone light sensor. The paper-based colorimeter with smartphone light sensor is low-cost, mobile and real-time for the detection of coloring dye concentration. The detection response of the paper-based colorimeter system was found to be linear with the coloring dye concentration in the range from 0 to 0.025 g/mL with a correlation coefficient (R2) 0.89±0.04. The experimental results show that this paper-based colorimeter system is highly sensitive and have a potential application, from student labs to small industries.
Keywords: paper-based colorimeter, absorbance vs. concentration relations, smartphone light sensor
