(1) The document describes an Arduino-based project to detect adulteration in liquids like oil, milk, and water. (2) It was motivated by the serious issue of adulteration in edible oils using cheap adulterants that can cause life-threatening diseases. (3) The project aims to make consumers aware of adulteration levels and risks through a system using a pH sensor, Arduino board, and GSM module to measure and send purity readings to consumers.