Table 3: Proton inventory studies for cephalexin in H2O-D2O mixtures at 301 K.

H2O-D2O mixtures (v/v)Atom fraction of deuterium ( ) 104 (s−1)( / )1/2

00.0002.311.0000
250.2482.750.9165
500.4973.320.8341
750.7453.860.7736
1000.9944.450.7205

Experimental conditions: [CAT]o = 2.0 10−4 mol dm−3; [Substrate]o= 1.0 10−3 mol dm−3; and [NaOH] = 4.4 10−3 mol dm−3.