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The sodium fusion test, or Lassaigne's test, is used in elemental analysis for the qualitative determination of the presence of foreign elements, namely halogens, nitrogen, and sulfur, in an organic compound. It was developed by J. L. Lassaigne. [1] The test involves heating the sample with sodium metal, "fusing" it with the sample. A variety ...
When fusion is complete, the sample is tipped into a mold (usually iron) where the slag floats to the top, and the lead, now alloyed with the precious metals, sinks to the bottom, forming a 'button'. After solidification, the samples are knocked out, and the lead bullets recovered for cupellation, or for analysis by other means.
The Linus program [a] was an experimental fusion power project developed by the United States Naval Research Laboratory (NRL) starting in 1971. [2] The goal of the project was to produce a controlled fusion reaction by compressing plasma inside a metal liner. The basic concept is today known as magnetized target fusion.
Determination of platinum group elements and gold in geological samples with ICP-MS using a sodium peroxide fusion and tellurium co-precipitation. J. Anal. At. Spectrom., 15, p747-751; Galindo, C., Mougina, L. and Nourreddinea,A. 2007. An improved radiochemical separation of uranium and thorium in environmental samples involving peroxide fusion.
Flame test of a few metal ions. A flame test involves introducing a sample of the element or compound to a hot, non-luminous flame and observing the color of the flame that results. [4] The compound can be made into a paste with concentrated hydrochloric acid, as metal halides, being volatile, give better results. [5]
Metal testing is a process or procedure used to check composition of an unknown metallic substance. [1] There are destructive processes and nondestructive processes. Metal testing can also include, determining the properties of newly forged metal alloys .
Vacuum fusion is an analytical chemistry technique, used for determining the oxygen, hydrogen, and sometimes nitrogen content of metals. While ineffective when used on alkali or earth metals , vacuum fusion remains a viable means when applied to almost all other metals.
When specimens are very sensitive to temperature, "cold mounts" may be made with a two-part epoxy resin. Mounting a specimen provides a safe, standardized, and ergonomic way by which to hold a sample during the grinding and polishing operations. A macro etched copper disc. After mounting, the specimen is wet ground to reveal the surface of the ...