In 1923, Austrian chemist Fritz Pregl was awarded the Nobel Prize in chemistry for his contributions to quantitative microanalysis as it became an essential tool to determine the elements present in a sample or compound. In chemistry, this technique is used to determine the identity and purity of a chemical while in geology, is used to determine the elements present in a mineral.
Click here for original story, Study that challenged validity of elemental analysis leads to scientific journals changing guidelines
Source: Phys.org