Guanidine HCL and Anti-albumin depletion kit

[danfive]

According to this article, http://www.biochemj.org/bj/325/0707/3250707.pdf , Guanidine HCL really disrupts the antigen binding site of the antibody and even the Fc terminus that binds to protein A (all of this at concentrations too low to create noticeable structural conformational disruptions).

Does anyone know of an elution buffer (Mass Spec compatible) that will allow my albumin depletion kit to keep hold of albumin and keep it bound while consistently eluting albumin attached peptides?

Normally I would use cibachron blue to capture albumin, but am now looking specifically for an antibody capture of albumin.

[danfive]

Update---too unlikely to find such a gentle elution buffer. Anyone with similar problem can note that I solved this issue by using a MW cutoff filter column to separate albumin from smaller proteins/peptides after elution with the "harsh" elution buffer.