Figures of merit for the water content determination in the
five
RTILs studied using CSSWV-SI as the stripping technique are
presented in Table 2. The precision was evaluated in the different
RTILs after drying them under vacuum with stirring for 12 h at
60 C. Replicate additions of a standard solution of water in the
corresponding RTIL were made as to obtain three or four different
concentration levels of added water within the linear range.
Satisfactory recoveries with small relative errors (Er%) and small
standard deviations (RSD%) were obtained, indicating the high
accuracy of the method using either DPV, LSV or SWV as stripping
technique, as shown in Table S2 for the determination of water in
[C2mim][NTf2] with four concentration levels of water. Table S3
(see Supplementary Information, Appendix A) shows similar data
related to the determination of water in [C2mim][BF4] with three
concentration levels of added water for all the stripping techniques
proposed. A similar study was carried out using only LSV and SWV
as stripping techniques with three concentration levels of added
water in [C2Him][NTf2] (Table S4), [C3mim][NTf2] (Table S5) and