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flame photometry is a type of atomic EMISSION spectroscopy. The sample is excited (raised to a high temperature), causing the emission of light. the wavelength of the emitted light is a function of the energy of the excited electrons, so each element has a characteristic set of wavelengths. usually a single wavelength is detected and the intensity of the emission is used to calculate concentration. Atomic adsorption works in the reverse way. A light of a standard wavelength (a wavelength characteristic of the target element) is passed through a flame containing the unknown substance, and the concentration of the target element is determined by the reduction in the energy of this light as it passes through the flame. the light is adsorbed by the electrons in the target element, kicking them into a higher orbit or completely out of the atom, depending on the energy involved. basically, one method involves the emission of the energy as an excited electron kicks back down to a lower state, and the other involves the adsorption of energy as an electron is kicked up an energy state. Same basic principle-change in electron energy relates to light of a specified wavelength and the change in the amount of that light can be measured and converted to a concentration.
What else can I help you with?
How is light produced when elements are heated to high temperatures?
This is particularly true to metals, and are the basis for flame tests and even for flame AAS analysis. When a metal is heated, the energy is taken in, and this promotes an electron to the lowest unoccupied molecular orbital (LUMO). When this electron falls back down to the highest occupied molecular orbital (HOMO) the energy is often released as light, with a wavelength proportional to the energy difference between the HOMO and LUMO.
What are the differences between the aa as afa and aas degrees?
The diffrence between a AA(associate of arts)AS(associate of science),and AFA(associate of fine arts) and AAS(associate of applied science) really depend on how long you want to be in school or how much money you want to spent.some required to be in school longer than others. if you plan to get your two year deggree and enter the world of work,you should enroll in the AAS program. and if your looking to transfer into a university that will make you spent thousand of dollars for education and struggle of work and lack of sleep but well worth it in the end you will enroll for your AA or AS. These courses are designed to transfer into a bachelors degree and are taught by faculty with at least a masters degree. Comment if this answered your question or write back.Thank you>
What are the differences between AAS and AES in terms of the source used?
Emission spectroscopyis a spectroscopic technique which examines the wavelengths of photons emitted by atoms or molecules during their transition from an excited state to a lower energy state. Each element emits a characteristic set of discrete wavelengths according to its electronic structure, by observing these wavelengths the elemental composition of the sample can be determined. Absorption spectroscopy measures the loss of electromagnetic energy after it illuminates the sample under study. For example, if a light source with a broad band of wavelengths is directed at a vapour of atoms, ions, or molecules, the particles will absorb those wavelengths that can excite them from one quantum state to another.
Why is fluorescence a more sensitive technique than absorption?
Answer- Flames in atomic emission are more sensitive to flame instability because optimum excitation conditions vary widely from element to element. High temperatures are needed for excitation of some elements and low temperatures for others. The region of flame that gives rise to optimum line intensities varies from element to element. Flame is rarely use in atomic emission because atomization is more complete when using a plasma due to the production of high temperatures. Also the plasma helps reduce the ionization interference effects. In flame absorption, after the sample is nebulized by a flow of gaseous oxidant, mixed with a gaseous fuel and carried into the flame it is then atomized. Then some of the atoms in the gas ionize to form cations and electrons. In flame emission the sample is introduce with argon, carries the sample into the flame. The flame is suppose to atomize the sample, while the flow of gas takes the ions and electrons to be detected.
What is volatilization?
A process in which a dissolved sample is vapourized in atomic spectoscopy this is usually a 2 step process. The analyte is turned into small droplets in a nebulizer which are entrained in a gas flow which i in turn volatilized in a high temperature flame in the case of AAS or volatilized in a gas plasma torch in the case of ICP spectroscopy. A process in which a dissolved sample is vapourized in atomic spectoscopy this is usually a 2 step process. The analyte is turned into small droplets in a nebulizer which are entrained in a gas flow which i in turn volatilized in a high temperature flame in the case of AAS or volatilized in a gas plasma torch in the case of ICP spectroscopy.
What is the difference between an AS in Ag Business and an AAS in Ag Business?
AS is a buisness thats doing very well for itself, however an AAS is one that is doing very badly
What is a AAS triangle?
AAS stands for Angle Angle and Side
When was Raimo Aas born?
Raimo Aas was born in 1953.
When was Agnar Aas born?
Agnar Aas was born in 1951.
When was Aas-Jakobsen created?
Aas-Jakobsen was created in 1937.
When did Thomas Aas die?
Thomas Aas died in 1961.
When was Thomas Aas born?
Thomas Aas was born in 1887.
When did Karl Aas die?
Karl Aas died in 1943.
When was Karl Aas born?
Karl Aas was born in 1899.
When did Ulf Aas die?
Ulf Aas died in 2011.
When was Ulf Aas born?
Ulf Aas was born in 1919.
When did Rolf Aas die?
Rolf Aas died in 1946.
