Electrokinetic control of a chemical reaction in a lab-on-a-chip micro-reactor: measurement and quantitative modellingElectronic supplementary information (ESI) available. The first video file (run2 PADA 450nm.avi) shows a video sequence of gray images recorded at 450 nm where PADA has maximum absorbance. The sequence shows the PADA injection followed by reaction when the 'flow' mode is restarted. The second file (run2 Complex 550nm.avi) shows the corresponding image sequence recorded at 550 nm where the complex has maximum absorbance. The videos do not correspond to real time; they consist of a series of 'snapshots' run in sequence. The actual time sequences are detailed in Figs. 11 and 12. See http://www.rsc.org/suppdata/lc/b2/b201685k/