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. Author manuscript; available in PMC: 2014 May 15.
Published in final edited form as: Anal Bioanal Chem. 2008 Dec 7;393(4):1135–1141. doi: 10.1007/s00216-008-2521-y

Fig. 2.

Fig. 2

Calibration of the pH-sensitive nanoprobe. A pH calibration curve can be generated using the intensity of the ~1,425 cm−1 pMBA carboxylate band relative to the intensity of the ~1,587 cm−1 combination band. Error bars represent two standard deviations in the y dimension and the resolution of the pH meter in the x dimension