The flame photometer principle of
operation is straightforward. Under analysis, the fluid is sprayed with a
non-shiny flame in the form of fine mist, which becomes colored as per to the
characteristic emissions of the elements, for example, Sodium (Na) 589 nm,
Potassium (K) 768 nm, Calcium (Ca) 622 nm, and Lithium (Li) 671 nm.
A
photodetector that sees the flame through a particularly narrow-band optical
filter which passes only the wavelength centered on the characteristic emission
of the elected element observes the flame. The photo detector's output is fed
to electronic modules, which offer digital readings of the concentration of the
preferred element.
The system is required to be standardized with the known
concentrations of the solution for elements of interest, prior to analyzing the
unknown fluid sample. In a measurement setup, with the help of a compressor,
compressed air is provided to an atomizer, because of a draught of air at the
tip of an atomizer, in the mixing chamber sample solution is sucked and
entering into the mixing chamber. On a controlled pressure, liquid petroleum
gas (LPG) is also used in the mixing chamber, Here the atomized sample and gas
is travel to the burner and is ignited.
The light from the flame is emitted and
is composed by the optical lenses and sent through a selected filter to the
detector of the flame photometer. The output of the detector processed
electronically and the results of the sample solution are displayed properly.
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