Linked from
The 9 pages that link to Elemental analysis, each with the reason it gives.
Chemical elementRelated: It identifies elemental composition rather than merely naming a substance.
Molecular formulaRelated: Measured element proportions can constrain a compound’s formula.
Chemical compositionBroader topic: It measures the element-by-element makeup directly.
Fritz PreglRelated: Pregl refined this practice to work with minute quantities of organic material.