<human>:  Why is it called High Performance Liquid Chromatography?
<bot>: It’s called High Performance because it’s a very fast and accurate way to separate molecules. In High Performance Liquid Chromatography, a sample is injected into a small tube, called a column, and the sample is passed through a solvent, called the mobile phase. The mobile phase is then forced through the column by a pump. As the sample passes through the column, the different molecules in the sample separate into different bands. The bands are then detected by a detector, and the peaks are recorded.