The Development of Economic Colorimeter for the Analysis of Parameters in Water Samples
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Abstract
An economical colorimeter was developed to monitor water quality. The color measurement was performed using a TCS34725 color sensor, which was controlled by an Arduino UNO R3 microcontroller. The sensor provided red, green, and blue (RGB) color intensity values, which could be displayed on both the colorimeter’s LCD screen and a computer monitor. The device was compact in size (10.0 x 15.0 x 10.3 cm) and could be powered either by AC electricity or via a USB port connected to a computer. The developed colorimeter was employed to assess water quality parameters, i.e., pH, hardness, and chemical oxygen demand (COD), based on colorimetric methods. The analytical results for each parameter corresponded to the standard method when compared by a paired t-test at a 95% confidence level. The colorimeter demonstrated high precision in color detection, with a relative standard deviation (%RSD) of less than 5.0% by consuming the solution 3.0 ml per detection.
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