The solutions of sample and reagent (0.0052% (m/v) p-DAC, prepared in 2.43102 mol L1 HCl) were pumped using 1.42 mm i.d.Tygons tubing, and the solution of 5.00103 mol L1 SDS, prepared in 2.43102 mol L1 HCl, was pump edusing 2.06 mm i.d. tubing.
The solutionsof sample and reagent (0.0052% (m/v) p-DAC, prepared in2.43102 mol L1 HCl) were pumped using 1.42 mm i.d.Tygonstubing, and the solution of 5.00103 mol L1 SDS, prepared in2.43102 mol L1 HCl, was pump edusing 2.06 mm i.d. tubing.