Respected researchers CAS is used for the detection of Siderophore production. Can we use any other alternative methods for siderophore production which does not include CAS (Chrome Azurol Stain ).
I think the only other way to detect and assess the siderophore production is by using the HPLC technic. the challenge is to Know the exact molecules that play the role of Siderophore as they are several molecules depending on the producer organism. For example, Pseudomonas produce Ferribactin.
in this case, you can track this molecule by HPLC by using the same molecule as a positive control (High grade for HPLC).