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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)
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.
Sample material: solid
Sample weight: unstated
|Index||Method Order||Method ID||Quantity||Detection Limit|
Associated Analytical Packages:
|Index||Package ID||Package Name|
|1||153||BCDEMPR, W.M. Johnson (URP stream sediment) AAS(Sn), COL(W)|
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