Table 1.

Assessment of the analytical imprecision of ESIMS using manual and automated procedures.

SamplesIE1Mean ± SDCV, %
Interassay precision:2 daily quality-control data over 4 months
LI3 (n = 25)4.803.74 ± 0.164.3
L2 (n = 25)8.807.85 ± 0.172.1
Intraassay precision: manual method
Low4 (n = 10)4.33.96 ± 0.143.5
Medium (n = 10)7.36.64 ± 0.111.6
High (n = 10)12.910.91 ± 0.201.6
Intraassay precision: automated method
Low (n = 10)3.43.74 ± 0.195.0
Medium (n = 10)8.47.41 ± 0.233.1
High (n = 10)13.911.71 ± 0.201.7