Standards are vital for experiments in analytical chemistry. They are known concentrations or purities that have been verified so they can be used in experiments and research. Standards are often obtained through vendors with varying degrees of preciseness. The more pure (less error) the standard is, the higher the cost, and the better the yield. Because of these factors, it should be considered what is reasonable for the experiment being conducted. For example, high school students will not need the same type of standard as a graduate student doing research most of the time.
Overall, analytical chemistry involves various methods of extracting data and information out of an experiment or a sample. The techniques used in this field can be applied to all other chemistry fields in one way or another whether it is simply observing a color change or determining the yield of the reaction.