This is a possible problem for lots of excessive purity functions, as iron ions can work together with product and cause impurities and/or low product yield. Since there was no lack of mass for the coupons after the 1-week trial (scale accuracy is 0.1 mg), they have been returned to the 6M guanidine hydrochloride resolution to soak for 3.5 extra weeks (1 month whole exposure). Once Mo... https://urlscan.io/result/019a2ed3-3f45-73e4-ad59-35eaf24548b0/