Elemental analysis is the study of the qualitative and quantitative determination of the elemental composition of a substance. This can involve the identification and measurement of individual elements within a sample, as well as the determination of the overall elemental composition of the sample. This information can be useful in a variety of fields, including chemistry, environmental science, materials science, and forensic science. Techniques used in elemental analysis include spectroscopy, mass spectrometry, X-ray fluorescence, and atomic absorption spectroscopy.