ANALYTICAL CHEMISTRY RESEARCH FLAME PHOTOMETRY

A. S. Vimala*, Ruban Raj U., Rosini R. and Rohit A. S.

Flame photometry, or flame emission spectroscopy, is a technique used to analyze metal elements by mea suring the intensity of light emitted when a metal is introduced into a flame. The wavelength of the emitted light identifies the element, while the intensity indicates its concentration. It is most effective for elements in the first two columns of the pe riodic table, such as sodium, potassium, and calcium, and is useful in fields like medicine, agriculture, and plant science. Flame photometry works by vaporizing a liquid sample, exciting atoms in the flame, and measuring the emitted light. The emitted pho tons correspond to specific energy transitions within the atom, with their wavelength determined by the energy difference between levels. However, this method has limitations, including its inability to analyze metals that require higher energy levels for excitation, such as noble metals and inert gases. Additionally, it cannot provide information on the molecular form of the metal in the sample and is limited to liquid samples. Instrumentation involves components like burners, which control flame temperatu re, and the type of fuel and oxidant used. While flame photometry offers simplicity, sensitivity, and reliability, it is less suitable for complex analyses requiring high energy, like those of transition metals.