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Chemex AAS (As; hydride evolution) decomp: 6 ml - 4 HCl 1 HNO3
Chemex, atomic absorption spectroscopy - hydride evolution (arsenic) decomp: 6 ml - 4 HCl 1 HNO3
A 1 gram sample was reacted with 6 ml of a mixture of 4M HCL and M HNO3 in a test-tube overnight at room temperature. After the overnight digestion, the test-tube was immersed in a hot water bath at room temperature and brought up to 90°C and held at this temperature for 2 hours with periodic shaking. The sample solution was then diluted to 20 ml with metal free water and mixed.
The element was determined by atomic absorption using a hydride evolution method wherein the hydride (AsH3 or SbH3) is evolved and passed through a heated quartz tube in the light path of an atomic absorption spectrophotometer. The method is described by Aslin (1976).
Aslin, G.E.M. (1976). The determination of arsenic and antimony in geological materials by flameless atomic absorption spectrophotometer. Journal of Geochemical Exploration v6, p321-330.
Sample material: solid
Sample weight: 1000 milligrams
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