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Chemex AAS (As; hydride evolution) 6ml decomp: 4 HNO3 1 HCL



Chemex, atomic absorption spectroscopy - hydride evolution (arsenic) 6ml decomp: 4 HNO3 1 HCL

General Methodology:

A 1 gram sample was reacted with 6 ml of a mixture of 4 M HNO3 and M HCl in a test-tube overnight at room temperature.  After digestion, the test-tube was immersed in a hot water bath at room temperature and brought up to 90oC 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).

Reference:

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.

Instrument: unstated

Sample material: solid

Sample weight: unstated


Analytical Technique:

Hierarchical classification

Technique >> Spectroscopy >> Electromagnetic radiation >> Visible-ultraviolet >> Atomic >> Absorption >> Hydride

Children

None


Analytical Decomposition:

Hierarchical classification

Decomposition >> Aqueous dissolution >> Acid >> Moderate Acid >> Aqua Regia (s.l.) >> Aqua regia (NGR)

Children

Aqua regia (NGR-S) | Aqua regia (NGR-L) | Aqua regia (NGR-S, no details) | Aqua regia (NGR-L, no details) | Aqua regia (NGR-LS) | Aqua regia (NGR-S, alternate) | Aqua regia (NGR-L, alternate) | Aqua regia (NGR-S, BC)


Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  1032     As_AAS  1

Associated Analytical Packages:

IndexPackage IDPackage Name
1  416     Chemex (NGR lake sediment) AAS (8+5), CVAAS (Hg), COL(W), LOI, NADNC (U-5**10)
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