Detection of Hexavalent Chromium Concentration in Aqueous Solution Using Lab Developed Colorimeter

Abstract The detection of hazardous carcinogenic heavy metals in aqueous solutions is important for biological health and environmental protection. There are various techniques to ascertain these oncogenic chemicals an solution, like a potentiometric electrochemical sensor, spectrophotometer colorimeter chemical sensors. As compared other available methods, the sensor has advantages such as low-cost instrument, qualitative sample detection, higher precision. In this paper, developed lab detect hexavalent chromium [Cr (VI)] solution. Moreover, absorbance principle used calibrate measure known concentration using amplified optical power light-emitting diodes (OP-LED). estimation Cr (VI) solution evaluated programmed Arduino UNO development board. value displayed on touch screen. readings instrument annotates that percentage can be determine unknown concentration. determined with commercially colorimeters concerning lab-developed colorimeter.