Skip to main content
. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: J Nucl Med. 2015 Feb 5;56(3):483–488. doi: 10.2967/jnumed.114.146605

Figure 1. Chemical structures of the pH indicators.

Figure 1

Left: phenolphthalein (PP); Middle: difluorophenol red (DFPR); Right: monofluorocresol purple (MFCP). The pH dependent changes in the indicator color is shown underneath.