. Author manuscript; available in PMC: 2018 Jan 12.

Published in final edited form as: Biomacromolecules. 2015 Dec 16;17(1):237–245. doi: 10.1021/acs.biomac.5b01330

Table 2.

Removal of Unconjugated Dopamine from CarboxySF(0) Using Different Sample Washing Methods^a

washing method	dopamine removed (% of initial)
initial (no wash)	0.00
protocol A	93.3
protocol B	93.2
protocol C	100 (no dopamine detected)
protocol D	96.3
protocol E	93.9
protocol F	93.5

After each wash, samples were lyophilized before dissolving in deuterated DMSO, measuring with ¹H NMR, and integrating the resonances from dopamine (at 2.64 and 2.91 ppm) in the resulting spectra to quantify the dopamine present in the sample.