flame test and atomic spectra lab answers

These radiations generally lie in the visible region of the spectrum. Hence, these atoms emit radiations when returning back to the ground state. But these atoms are not stable at higher levels. Some of these atoms further get excited to even higher levels. The compounds of the alkali and alkaline earth metals (Group II) dissociate into atoms when introduced into the flame.

The International Union of Pure and Applied Chemistry (IUPAC) Committee on Spectroscopic Nomenclature has named this technique as flame atomic emission spectrometry (FAES). Flame photometer can be used to determine the concentration of certain metal ions like sodium, potassium, lithium, calcium and cesium etc. In flame photometer spectra the metal ions are used in the form of atoms. Currently, it has become a necessary tool in the field of analytical chemistry. It is also known as flame emission spectroscopy. The wavelength of the colour gives information about the element and the colour of the flame gives information about the amount of the element present in the sample.įlame photometry is one of the branches of atomic absorption spectroscopy. The principle of flame photometer is based on the measurement of the emitted light intensity when a metal is introduced into the flame.

They named this instrument as Flame photometer. During 1980s Bowling Barnes, David Richardson, John Berry and Robert Hood developed an instrument to measure the low concentrations of sodium and potassium in a solution.

Flame test and atomic spectra lab answers