An Ultrasonic Method:A Diagnostic Tool to Determine Adulteration in Liquid Fuels

An ultrasonic grating acts as a sensor to evaluate adulteration in liquids. The method on physical optics in combination with ultrasonic grating has been used to diagnose adulteration in liquid mixtures for the present study. In this method separation between the diffracted dots depends upon the concentration or density or the refractive index of the adulterants. The variation of successive diffracted dots with concentration is sensitive enough to detect very small amount of adulteration. Light is diffracted due to ultrasonic grating and the separation of diffracted dots observed on the screen is a measure of adulteration in liquid mixtures.