Detection of Reduced Sulfur in Kraft Paper
These nitrogen bubbles indicate the presence of reduced sulfur. This is the particle side of an environmental
tapelift collected in a battery recycling plant.
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:
Hahn, F.L., "Microdetection of sulfur in insoluble sulfates and in organic compounds", IECA, pp. 199-,
West, Philip W., "Microchemical applications of catalytic and induced reactions", Analytical Chemistry,
vol. 23, no. 1, pp. 176-180, 1951