Graphite Furnace Atomic Absorption Spectrometer (GF-AAS) Specifications of gases needed are shown in the following table: And the combination will be "acetylene + air" or "acetylene + nitrous oxide", to ignite the flame. The fuel is acetylene, and the oxidant can be compressed air or nitrous oxide. The gas needed includes fuel and oxidant. Published: Wednesday, 28 October 2015 Flame Atomic Absorption Spectrometer (F-AAS) The strength of GNR Spark OES had been optimized to the best air pressure while manufacturing. Too strong flushing will generate air entrainment result. The Stronger Argon Gas Flushing, The Better Result? However, some special designed Spark OES can largely reduce the consumption of argon gas to the minimum, such as GNR's Spark OES. Since argon gas had been used as shielding gas on the discharge electrode, some Spark OES shares the argon to purge the optics chamber in the spectrometer. Why Are Some Spark OES Consumes More Argon Gas? Spark OES uses argon gas to isolate the elements in the atmosphere, which are also the composition of the alloy. TIG welding uses argon as a shielding gas to oxidation on the welding point. Magnesium Nitride.) Is It The Same Principle of TIG Welding? And nitrogen can react with metals in under high temperature, and result residues. Some alloy are composed of nitrogen and it is needed to be analyzed. Neon: neon light or mercury lamp filling, plasma research, laser beam (He-Ne)Īrgon: metal welding, OES spectrometer. Helium: ultra-low temperature cooling, vapor deposition, balloons of diving suits filling. ![]() Price of Argon is relatively inexpensive, typically, the price of inter gases from cheapest one to most expensive one:.In the composition of alloy, the element Argon is not ignored.Spectrometer can detect the element, which has its characteristic peak below the wavelength 200nm correctly.Isolate the atmosphere by flushing the surface so that the spectrometer won’t detect the elements in the atmosphere.Argon is an inert gas and won’t react with the elements in the alloy during the sparking period.Below are the reasons of using high purity argon as the shielding :.Such as GNR's S9 Atlantis Spark OES, the top level Spark OES. Some Spark OES even designed PMT illuminate source for specific and increase its accuracy of specific elements. By the percentage of elements been detected, the grade of alloy is defined. Since each elements has it's characteristic peaks in certain wavelength(s) in the spectrum, one can analyze the composition of elements in the alloy, as well as their percentage. The excited atoms and ions in the plasma is detected by a spectrometer in the Spark OES instrument. ![]() The energy of spark burns the a thin surface of the metal sample, and generate the plasma. Spark OES detected the percentage of elements in the ferrous and non-ferrous alloy, includes it's major metal matrix and other elements. Optical Emission Spectrometry (Spark OES), an important instrument for analyzing the composition of metal and alloy.
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