. Author manuscript; available in PMC: 2011 Jan 15.

Published in final edited form as: Anal Chem. 2010 Jan 15;82(2):680–688. doi: 10.1021/ac902222n

Table 3.

Concentrations of the functional groups on the surface of unoxidized and oxidized 3DOM carbon. The E° values of electrodes prepared with oxidized and unoxidized 3DOM carbon solid contacts and polymeric sensing membranes are also shown.

Oxidation time	Ketone	Phenol	Lactone and lactol	Carboxylic acid
(min)	(mmol/g)	(mmol/g)	(mmol/g)	(mmol/g)^a	E° (mV)^b
0	0.34	0.27	0.0	0.0	285±27
10	0.51	0.35	0.35	0.79	531±30
30	0.75	0.50	0.44	1.60	421±19
60	1.05	0.65	0.91	2.72	642±17

The titration method cannot distinguish between carboxylic acid and anhydride groups, which may also be present.

The E° values are an average of three (60 min oxidation) or four (0, 10, and 30 min oxidation) electrodes preparedin an identical manner.