This technique is particularly useful in fields such as phytochemistry, medicine, analytical chemistry, and biological analysis. Commonly used techniques include infrared (IR) spectroscopy, ultraviolet-visible (UV/Vis) spectroscopy, Raman spectroscopy, and fluorescence spectroscopy. Each of these methods offers unique insights: IR spectroscopy is effective for identifying functional groups, UV/Vis spectroscopy is used to analyze electronic transitions, Raman spectroscopy provides information about molecular vibrations, and fluorescence spectroscopy is sensitive for detecting low concentrations of compounds. Together, these techniques play a crucial role in research and quality control across various scientific disciplines.