A SATISFACTORY METHOD OF GENERATING HYDROGEN SULFIDE V. T. JACKSON AND F. C. SUHRER University of Florida, Gainesville, Florida
HYDROGEN sulfide is a necessary nuisance around the analytical laboratory. Tubes conveying it frequently leak, and the poisonous nature of the gas sometimes overcomes students. It has been known for some time that a mixture of paraffin and sulfur can be purchased under the name of "aitchtuess." This, when heated, evolves hydrogen sulfide. We have found that if a mixture of equal parts of
rosin and sulfur are mixed and heated in a testtube, hydrogen sulfide is easily evolved. It is not necessary to grind the substances finer than to pass .a 20-mesh sieve. If one gram of each of the substances is used, the quantity of gas liberated is sufficient for an ordinary analytical precipitation. The carbon residue is rather friable and easily removed.
