We indeed discussed RF a couple of months ago.
Additional ways to reduce RF interference is by diluting the specimen
(RF, being a low affinity antibody, will be less active) and conducting
reations at higher temperature.
I missed the initial message, so I have no idea of the system involved.
There are additional ways to counteract RF, but they depend on what one
is trying to measure.
Falk Fish, Tel-Aviv, Israel