chromatography

Chromatography is a way to discover what something is made of. Every thing around us is made of chemicals. Using chromatography, these chemicals are seperated by the weight of the molecules which then show up as a "blip" on a computer screen. Since the csi team know the weight of all chemicals, then they know what each of the chemicals are in the test sample. These machines are used on CSI to study things found at crime scenes, by companies who make medicine to discover new substances and by criminals who try to find out how a competitor makes something.