What do these sportsman have in common? Performance Enhancing Drugs and Chemical Analysis How did the world know? The Ben Johnson Story (click on the link-you will have to register) Can you name the sporting persons? Questions 1. Give the names of 3 performance enhancing drugs available to the modern athlete and give a brief description of how they improve the athletes performance. David Millar Story (Click on the link) 2. Name some of the methods chemists use to detect these drugs Questions 3. One of the most important methods is GC-MS (Gas chromatography-mass spectroscopy). What does this method involve and use a simple diagram to illustrate your points. 4. Some sports people and scientists suggest that performance enhancing drugs should be legalised. What are you feelings about this and why? Paper Chromatography Chromatography is used to separate mixtures of coloured or non-coloured substances that are soluble in the same solvent. Paper chromatography is the simple method of doing this. spot of mixture solvent A spot of the mixture is placed on some filter paper. In method A, the solvent is soaked up the paper. The substances in the mixture get separated because more soluble substances spread along the paper faster. Chromatography Experiment Identifying dyes in a mixture Chromatography can be used to find out if a dye is made up of a single coloured substance or a mixture. The mixture consists of dyes 3 and 5. 1 2 3 4 5 6 mixture 1 2 3 4 5 6 mixture Dots of known single dyes are placed alongside the dot for the unknown mixture. After the solvent washes through the paper, the pattern of the dyes in the mixture is compared with the single dyes. Which dyes does the mixture consist of? Identifying dyes in a mixture Which dyes are in the mixture? 1 2 3 4 5 6 mixture 1 2 3 4 5 6 mixture The mixture consists of dyes 1 and 4.