Analytical Suite Metadata

B.C.D.E.M.P.R., W.M. Johnson (stream and lake sediments) AAS (Sn; nitrous oxide-acetylene)

B.C.D.E.M.P.R., W.M. Johnson, stream and lake sediments; atomic absorption spectroscopy (tin)

General Methodology:

Tin was determined by a method which was only slightly modified from that described by E.P. Welsch and T.T. Chao (1976).  A 1.0 gram sample is heated with NH4I in a modified pyropot furnace for 15 minutes at 500oC.  This reaction which converts the tin in the sample to SnI4, is done in a 25x200 mm test tube.  After cooling, the residue is leached with 20 ml of a solution which is 5% V/V in HCl and 6% W/V in ascorbic acid.  After leaching, the sample is cooled to room temperature and 5 ml of 4% W/V trioctylphosphine oxide in methly isobutyl ketone (MIBK) are added.  The test tube is capped and shaken for 60 seconds.  The solvent layer is then transferred to a small tube and centrifuged.  The tin in the solvent layer is then determined by atomic absorption spectroscopy using a nitrous oxide acetylene flame at 2863 angstrom units.  Standards are prepared in a manner similar to the samples.


Welsch, E.P. and Chao, T.T. (1976).  Determination of trace amounts of tin in geological materials by atomic absorption spectrometry.  Analytica Chimica Acta v82 p337-342.

Instrument: unstated

Sample material: solid

Sample weight: unstated

Analytical Technique:

Hierarchical classification

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



Analytical Decomposition:

Hierarchical classification

Decomposition >> Fusion >> Ammonium halide >> Ammonium Iodide



Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  1280     Sn_AAS  2

Associated Analytical Packages:

IndexPackage IDPackage Name
1  153     BCDEMPR, W.M. Johnson (URP stream sediment) AAS(Sn), COL(W)
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