Analytical Suite Metadata

Chemex (stream sediments) AAS (Ba; nitrous oxide-acetylene, UDL=10,000ppm)



Chemex, stream sediments; atomic absorption spectroscopy (barium; nitrous oxide-acetylene); upper detection limit = 10,000 ppm

General Methodology:

Barium was determined by atomic absorption spectroscopy using a nitrous oxide- acetylene flame.  A 0.5 gram sample was decomposed with 5 ml concentrated HF, 5 ml concentrated HClO4 and 2 ml concentrated HNO3.  The sample was then heated to fumes of perchloric acid and then to dryness.  3 ml concentrated HClO4 were added to the residue, heated to light fumes and then 5 ml of water were added.  The sample solution was then transferred to a test tube calibrated at 25 ml, containing 0.5 ml ionization buffer solution (0.05 gram NaCl/ml).  The sample solution was diluted to 25 ml, mixed and analysed.

Instrument: unstated

Sample material: solid

Sample weight: unstated


Analytical Technique:

Hierarchical classification

Technique >> Spectroscopy >> Electromagnetic radiation >> Visible-ultraviolet >> Atomic >> Absorption >> Flame >> C2H2/N2O

Children

None


Analytical Decomposition:

Hierarchical classification

Decomposition >> Aqueous dissolution >> Acid

Children

Strong Acid | Moderate Acid | Weak Acid


Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  2439     Ba_AAS  40

Associated Analytical Packages:

IndexPackage IDPackage Name
1  158     Chemex (URP stream sediment) AAS (8+Mo+Ba), CVAAS (Hg), COL(W)
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