Chances Stopped Flow Technique Revolutionized the Investigation of Moderately Fast Reactions

To eliminate the need for large volumes of reactants and to increase the versatility of measurement, Chance (1943) invented the stopped-flow apparatus by adding a third stopping syringe to receive the mixed reactant solutions after passage through the mixer and observation cuvette (see Fig. 10.4). The two reactant syringes are attached to a pneumatic piston that is driven by compressed nitrogen gas. As the third syringe fills, its retreating plunger contacts an electronic switch, stopping the...