[A new and sensitive resonance scattering spectral method for the determination of H2O2 using acridine red].

Under the conditions of pH 5. 0 HAc-NaAc, 1. 6 X 10(-3) mol x L(-1) KI-8. 0 X 10(-5) mol x L(-1) Fe2+-4. 0X 10(-6) mol x L(-1) H2O2-40 microg x mL(-1) acridine red (AR), when there is H2O2, reacts with I- to form I3- . The acridine red reacts with I3- to form AR-I3 ion association molecule. Under the action of the intermolecular and hydrophobic forces, these association molecules automatically aggregate to form (AR-I3 ), association particles that exhibit three resonance scattering peaks at 320, 400 and 595 nm respectively. The H2O2 concentration in the range of 0. 50-16. OX 10(-6) mol x L(-1) is proportional to the resonance scattering at 400 nm. And a new resonance scattering spectral method was described for the determination of H2O2 in water samples with satisfactory results.