Rapid and Automated Analytical Methods for Redox Species Based on Potentiometric Flow Injection Analysis Using Potential Buffers
Figure 3
Flow-injection manifold equipped with a gas-diffusion separation unit for the determination of ethanol and calibration peaks for ethanol. C.S: carrier (H2O): R.S.1: reagent solution (0.015 M K2Cr2O7, 2 M H2SO4); R.S.2: reagent solution (0.135 M Fe(NH4)2SO4); S: sample injector (140 L); G.D: gas-diffusion separation unit; R.C.1: reaction coil (1 m, 0.5 mm); R.C.2: reaction coil (2 m, 0.5 mm); B.P.C: back pressure coil (10 m, 0.5 mm).
