chemical analysis

• Pure - made up of just one substance, that can be either an element or compound
• a formulation is a mixture that has been specifically designed as a useful product, such as drugs and baby formula
• Chromatography is a method of separating substances with a different solubility
• The mobile phase (solvent) moves through the paper (stationary phase)
• the greater the solubility in the solvent, the further the substance travels up the paper
• Rf value = distance travelled by substance / distance travelled by solvent