Soil arylsulfatase is derived from soil microorganisms. It catalyzes the conversion of soil organic sulfur into inorganic sulfur that can be absorbed by plants, playing an important role in the biogeochemical cycling of sulfur and plant sulfur nutrition, and serves as an important biological indicator of soil quality.
Determination Principle: S-ASF catalyzes the hydrolysis of potassium p-nitrophenyl sulfate to produce p-nitrophenol, which exhibits a characteristic absorption peak at 410 nm.