surfactant that, when dissolved in water lowers the advancing contact angle and aids in displacing an air phase at the surface and replacing it with a liquid phase wetting agent most important property of a wetting agent? The software has an optional integrated function to measure chromaticity values and spectrum of a light source, for example LED’s. Food Foods fall into different categories such solids, powders and liquids, each should be measured accordingly. Wood surfaces liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern. Particles in a: gas vibrate and move freely at high speeds. liquid vibrate, move about, and slide past each other. solid vibrate (jiggle) but generally do not move from place to place. Simple distillation is a procedure by which two liquids with different boiling points can be separated. Simple distillation (the procedure outlined below) can be used effectively to separate liquids that have at least fifty degrees difference in their boiling points.