Why is Chromatography an important tool in analytical chemistry?
The main purpose of a chemical analysis is to determine the amount of a certain molecule or element in a sample. Here we call that species the analyte. To determine the amount of a certain analyte we must be able to distinguish that analyte from the other molecules or elements in the sample. In analytical chemistry there are several ways to do this: extraction, precipitation, evaporation, selective spectroscopical properties, by the sample preparation procedure etc. In most of these procedures the analyte is physically separated from the rest of the sample. When the separation has been achieved, the amount of the analyte is measured. Chromatography has become the most imoprtant technique to physically separate analytes from each other. The reason is that the chromatographic principle can easily be adapted to many different molecules or ions. It also offers good possibilities to measure the amount of analyte of interest in the sample. Furthermore the amount of a great number of analytes
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