Abstract
A knowledge of the optical properties of liquid substances is useful in enhancing the understanding of their unique characteristics. Properties such as refractive index, refractivity, and phase velocity have been used to assess the purity of liquids. We utilized measurements from a Digital Refractometer to detect and quantify the contamination of liquids such as drinking water, wine, and other beverages. We used antifreeze, ethylene glycol, and propylene glycol as contaminants. Results show that the level of contamination increases linearly with refractive index and that a contamination level of 1 % is detectable. The application of this technique in industrial settings will improve the detection of contamination of beverages.
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