Flame Photometric Detector or GC-FPD is a technique used to analyse sulphur or phosphorous containing compounds and metals such as tin, boron, arsenic and chromium. An FPD uses a hydrogen/air flame into which the sample is passed.
Is used as a detector in flame photometry?
The reason to use more than one kind of detector for gas chromatography is to achieve selective and/or highly sensitive detection of specific compounds encountered in particular chromatographic analyses. The determination of sulfur or phosphorus containing compounds is the job of the flame photometric detector (FPD).
Which detector is not used in flame photometer?
10. Which of the following is not a detector used in Flame emission photometers? Explanation: Detectors used in Flame emission photometers are Photovoltaic cell and photo emissive tubes. Photovoltaic cell is also known as photronic cell.
Where are flame photometer used?
Flame photometer is an analytical instrument used in clinical laboratories for determining of sodium, potassium, lithium and calcium ions in body fluids .
Which oxidant is used in flame photometry?
FLAME AND ITS CHARACTERISTICS
It is produced by burning a mixture of fuel and air or oxidant in a burner. In flame photometry a variety of fuels can be used and generally air, oxygen or nitrous oxide (N2O) is used as the oxidant.
Which detectors are used in AAS?
A photomultipier tube (PMT) is used for the measurement of low radiant power. The schematic of a PMT is similar to that of a traditional phototube. In a traditional phototube there are two electrodes, an anode and a cathode. When voltage is applied to the electrodes, the photons hit the cathode and generate electrons.
Which detector is used in gas chromatography?
General-Purpose Detectors. The FID is the most common detector used in gas chromatography. The FID is sensitive to, and capable of detecting, compounds that contain carbon atoms (C), which accounts for almost all organic compounds.
What is the basic principle of flame photometer?
The principle of flame photometer is based on the measurement of the emitted light intensity when a metal is introduced into the flame . 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.
What is the main principle of flame photometer?
In principle, it is a controlled flame test with the intensity of the flame color quantified by photoelectric circuitry . The intensity of the colour will depend on the energy that had been absorbed by the atoms that was sufficient to vaporise them. The sample is introduced to the flame at a constant rate.
How does flame photometer work?
Flame Photometry works by measuring the intensity of light emitted (measured using a wavelength of a colour) when the element is exposed to a Flame . Flame Photometer Components: ... The Flame is a burner that is within the instrument needed for temperature control and to heat up the solution.
What is the difference between AAS and flame photometer?
The main difference between flame photometry and atomic absorption is that in flame photometry the radiation emitted from the flame is measured , and in atomic absorption the decrease in the intensity of the radiation from thehollow cathode due to the absorption by the atoms in the flame is measured.
How do you maintain a flame photometer?
Always make sure to put back the rubber O-Ring to ensure is it air and water tight, push the baffle into the lower section of the mixing chamber and make sure it is not poking out over the tips of the lower section and flush with the surface, care should be taken to ensure it is replaced in the same orientation and ...
Why flame is used in flame photometry?
Both are directly proportional with the number of atoms in the sample. Flame photometry or flame emission spectroscopy is an atomic emission technique. There is no need for light source. Flame serves both as an as an atomizer and excitation source .
Which fuel are used in flame photometry?
Explanation: The commonly used fuel gases in flame photometry are acetylene, propane and hydrogen . Oxygen supply is given to the fuel gases.
Which is the correct order of AAS?
The standard AAS instrument consists of four components: the sample introduction area, the light (radiation) source, the monochromator or polychromator, and the detector (figure 1).
Which is the most widely used flame in AAS?
1.1 Flame atomic absorption spectrometry. Chromium is typically determined by flame AAS using an air-acetylene flame or a nitrous oxide-acetylene flame. Although chromium has a large number of resonance lines of similar sensitivity, the 357.9 nm line is most commonly used.
