Analytical Suite Metadata

GSC colorimetry: Mo, W

Geological Survey of Canada, colorimetry using dithiol, to determine Mo, W, sodium carbonate + sodium chloride + potassium nitrate fusion

General Methodology:

The sample is fused with a mixture of sodium carbonate, sodium chloride and potassium nitrate.  The test solution is split into two parts, to allow for the separate determinations of molybdenum and tungsten.  Dithiol is used as the colorimetric reagent.

The technique was described by North in 1956 and is clearly explained by Stanton (1966).

[North, A.A. (1956) Geochemical field methods for the determination of tungsten and molybdenum in soils.  Analyst, vol 81, p660-668.]

[Stanton, R.E. (1966). Rapid methods of trace analysis for geochemical applications.]

Instrument: unstated

Sample material: solid

Sample weight: unstated

Analytical Technique:

Hierarchical classification

Technique >> Photometry >> Fluorometry >> Dithiol



Analytical Decomposition:

Hierarchical classification

Decomposition >> Fusion >> Alkaline >> Carbonate + … >> Na2CO3-NaCl-KNO3



Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  2523     Mo_Col  1
2  2524     W_Col  4

Associated Analytical Packages:

IndexPackage IDPackage Name
1  272     GSC spectrography and colorimetry
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