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Updated: July 13, 2026
Introduce the suspected material into a retort. Acidulate with sulphuric acid to fix any ammonia present. Distil in the dark, through a glass tube kept cool by a stream of water. As the vapour passes over and condenses, a flash of light is perceived, which is the test. =Arsenic= is the most important of all the metallic poisons. It is much used in medicine and the arts.
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