Table 1. Equilibration Rates and Conversion Yields Obtained with Real-Time Mass Spectrometry for Hydrolysis of Acetylcholine with Immobilized Acetylcholinesterase (n = 3).

inlet concn (μM)	rate (min–1)	conversion (XACh)
1	6.9 ± 2.3	0.936 ± 0.046
0.1	2.4 ± 1.9	0.75 ± 0.26
0.01	0.195 ± 0.048	0.803 ± 0.062