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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

General Methodology:

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).

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.)

Children

Aqua Regia (s.s.) | Lefort | Aqua Regia (Acme/BVM) | Aqua regia (NGR) | Aqua regia (NASGLP)


Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  2193     As_AAS  1

Associated Analytical Packages:

IndexPackage IDPackage Name
1  364     Chemex (URP lake sediment) AAS(8+Mo+As), LOI
2  386     Chemex (NGR lake sediment) AAS (8+4), CVAAS (Hg), LOI500, U
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