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Detection of Reduced Sulfur

Detection of Reduced Sulfur in Kraft Paper

These nitrogen bubbles indicate the presence of reduced sulfur.



A solution of 1% sodium azide, 1% iodine, and 5% potassium iodide is a good reagent for the detection of sulfites, sulfides, thiocyanates, thiosulfates, and organic sulfur containing molecules. A positive result is indicated by the generation of nitrogen bubbles at the sulfur containing site or over the body of the material.

Significance in the Environment:

Characteristic Features:

Associated Particles:


Hahn, F.L., "Microdetection of sulfur in insoluble sulfates and in organic compounds", IECA, pp. 199-, March 1945.
West, Philip W., "Microchemical applications of catalytic and induced reactions", Analytical Chemistry, vol. 23, no. 1, pp. 176-180, 1951