一种用维多利亚蓝 B 测定 O3 的新共振瑞利散射光谱法。

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

机构信息

Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, College of Environment and Resource, Guangxi Normal University, Guangxi, Guilin 541004, China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2014 Jan 3;117:170-4. doi: 10.1016/j.saa.2013.07.085. Epub 2013 Aug 6.

DOI:10.1016/j.saa.2013.07.085

PMID:23988533

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 722 nm. Under the chosen conditions, the RRS peak intensity was linear with O3 concentration in the range of 0.2-50 μmol/L, with a linear regression equation of ΔI722=17.9c-45.4 and detection limit of 0.057 μmol/L. Accordingly, a simple, rapid and sensitive RRS spectral method was set up for determination of trace O3 in air, with satisfactory results.

摘要

臭氧（O3）可被硼酸-碘化钾（BKI）吸收溶液吸收，产生三碘离子（I3(-)），该离子与维多利亚蓝 B（VBB）反应形成缔合粒子（VBB-I3）n，并在 722nm 处表现出强共振瑞利散射（RRS）峰。在选定的条件下，RRS 峰强度与 0.2-50μmol/L 范围内的 O3 浓度呈线性关系，线性回归方程为ΔI722=17.9c-45.4，检出限为 0.057μmol/L。因此，建立了一种简单、快速、灵敏的 RRS 光谱法测定空气中痕量 O3，结果令人满意。