Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Measurement of pH with 13C,15N ACES. The calculated pH values of 7.16 and 6.86 correlated with the values of 7.22 and 6.91 measured on a pH meter following the experiment. The carboxylate of 13C,15N ACES is a doublet owing to coupling with the adjacent 15N.
