"On the Method of Sulfur Testing"

There is a way to test sulfur in the world, and it is often tested with lead acetate test paper and hydrogen sulfide. For lead acetate test paper, the plain paper is immersed in lead acetate solution, and then dried.

For hydrogen sulfide, the smell is like rotten eggs, and it is poisonous. When it encounters lead acetate test paper, it should be chemically activated. Sulfur ions in hydrogen sulfide combine with lead ions in lead acetate to produce lead sulfide. Lead sulfide is black in color, so when the color of the test paper turns black, it is known that there is hydrogen sulfide.

When testing, be careful. If there is a lot of hydrogen sulfide, it should be used in common places to prevent poisoning. And lead acetate test paper should be made new, and if it is left for a long time, the effect will be reduced. This method of sulfur testing is essential for all things in engineering and learning. It can cut off the presence or absence of hydrogen sulfide to avoid danger and clarify the quality.