![]() ![]() Then the flame is allowed to stabilize for about 5 min. The flame of the photometer is calibrated by adjusting the air and gas.Both the standard stock solution and sample solution are prepared in fresh distilled water.These electrical signals are directly proportional to the intensity of light. Here the emitted radiation is converted to an electrical signal with the help of photo detector. Photo-detector: The intensity of radiation emitted by the flame is measured by photo detector. Filters will isolate the wavelength to be measured from that of irrelevant emissions. Simple colour filters:The reflections from the mirror pass through the slit and reach the filters. The lens helps to focus the light on a point or slit. Convex mirror also helps to focus the emissions to the lens. The convex mirror transmits the light emitted from the atoms. Optical system:The optical system consists of convex mirror and convex lens. Nebuliser: Nebuliser is used to send homogeneous solution into the flame at a balanced rate. The temperature of the flame is one of the critical factors in flame photometry. It can be maintained in at a constant temperature. Source of flame:A Burner in the flame photometer is the source of flame. Parts of flame photometerĪ simple flame photometer consists of the following basic components: And the light emitted is in turn proportional to the concentration of the sample. The intensity of the emission is directly proportional to the number of atoms returning to the ground state. Each of the alkali and alkaline earth metals has a specific wavelength. 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. It does not store any personal data.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. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. ![]() The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. ![]()
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