Hydrogen Sulfide Production is Assayed by Growth in a Medium

Question

Hydrogen sulfide production is assayed by growth in a medium containing ferric iron (Fe3+).

Accepted Answer

Hydrogen sulfide production is commonly assayed by growth in a medium containing iron (Fe3+), which reacts with the hydrogen sulfide produced to form a black precipitate of ferrous sulfide (FeS). This is known as the iron agar or lead acetate agar test.