The invention discloses a method for dissolving antimonous
sulfide, which utilizes the acidity and coordinating capability of
hydrochloric acid and
phosphoric acid to dissolve through a chemical dissolving method. In the method, a chemical product antimonous
sulfide, the
chemical purity of which is 97.0%, is utilized as a dissolving object, the content of antimonous
sulfide can be measured after antimonous sulfide is dissolved under the optimum condition, and the measured result data can be used to illustrate the soluble completeness; the optimum condition of dissolving is as follows: adding 12ml of
hydrochloric acid and 5ml of
phosphoric acid; covering a
watch glass, shaking the
watch glass on an
electric stove while slowly heating until the solution is boiling slightly, removing the
watch glass, and maintaining slight boiling until the color of the solution is light yellow and transparent and is completely dissolved. Oxidation-reduction
titration is used to measure the content of antimonous sulfide, therefore, the dissolved antimonous sulfide exists in the solution in the form of
antimony (III), instead of in form of
antimony (V). By using the dissolving method of antimonous sulfide in the invention, the measured result after a sample is dissolved reaches 96.82, which differs 0.18% to the actual value. In the method, the sample can be completely dissolved, and the
solvent is non-toxic and safe and has low price, thereby meeting the requirements of environment protection and industrial production. The established dissolving method is also applied to dissolve antimonous sulfide in an
antimonite and antimonous sulfide used as an additive in the industry and has wide application prospect.