[BF4] was of 1.4±0.008 s/m, 0.352±0.004 s/m, 0.116±0.00011 s/m, and 0.069±0.0001 s/m, respectively (estimated conductivity are represented with a standard deviation of triplet experiments). These values agree with the previous reported, i.e., 1.563±0.06 s/m, 0.356±0.054 s/m, 0.118 s/m, and 0.067±0.007 s/m, respectively (Figure ). The agreement also demonstrates the high-throughput screening apparatus constructed in this study is capable of accurately providing ionic conductivity information over, at least, one order of magnitude. As the alkyl chain of the imidazolium-based tetrafluoroborate, RTIL, increases from C2 to C8, the conductivity of this RTIL system decreases. Therefore, this RTIL system has the following trend of ionic conductivity,