A new resonance Rayleigh scattering spectral method for determination of O3 with victoria blue B

Abstract

Ozone (O3) could be absorbed by boric acid–potassium iodide (BKI) absorbent solution to produce tri-iodine ion (I3-) that react with victoria blue B (VBB) to form the associated particle (VBB-I3)n and exhibited a strong resonance Rayleigh scattering (RRS) peak at 722nm. Under the chosen conditions, the RRS peak intensity was linear with O3 concentration in the range of 0.2–50μmol/L, with a linear regression equation of ΔI722=17.9c−45.4 and detection limit of 0.057μmol/L. Accordingly, a simple, rapid and sensitive RRS spectral method was set up for determination of trace O3 in air, with satisfactory results.