1.1 ,This test method provides a protocol for using enzyme-linked immunosorbent assay (ELISA) technology to test water samples for the enzyme adenosine 5’,-phosphosulfate reductase (APSr) concentration.
1.1.1 ,APSr is present in all known sulfate reducing protists (SRP –, sulfate reducing bacteria –, SRB –, and sulfate reducing archaea –, SRA).