Presence of Sideromyceines were detected by Chromoazeurol S (CAS) test. CAS assay is the universal assay for the detection of Sideromyceines and also Siderophores.
I know the CAS assay, but the problem is that even if you have a positive results with CAS you cannot be sure if you detected a Sideromycine or a Siderophore. Do you know any more specific test for Sideromycine?