If you have mastered the learning outcomes for Learning Module III, congratulations! MEKC is a flexible separation technique. Learning Module IV is a self-guided exercise designed to expand your skill in MEKC by analyzing a multi-component sample and performing qualitative and quantitative analysis of an unknown. This will assist you in devising separation strategies for future MEKC analyses. The procedures you have mastered in Learning Module III will be required to further refine your laboratory skills in the fourth Module.