“…The original stopped-ow technique 5 provides a m ethod for rapidly mixing two or m ore solutions and then monitoring the progress of the reaction via ultraviolet or visible spectroscopy. Additional methods of m onitoring, such as MS, [6][7][8][9] NMR, 10 -14 EPR, [15][16][17] and Raman spectroscopy, 18,19 are possible, but they do not have the widespread applicability that FT-IR possesses. Stopped-ow infrared spectroscopy has been reported using dispersive instruments 20 -25 or infrared lasers, [26][27][28] but the designs generally are capable of collecting data at a single wavelength.…”