A New Spectrophotometric Method for the Determination of Trace O₃ Using the Particle Reaction of Rhodamine 6G-I₃

Abstract:

O₃ reacted with KI-H₃BO₃ absorption solution to produce I₂ which can combine with the excess I- to form I₃-. In pH 4.0 HAc-NaAc buffer solution, I₃- reacted with rhodamine 6G (Rh6G) to form Rh6G-I₃ association particles, which exhibited a great decreasing at 525 nm. Under the chosen conditions, the decreased intensity ΔA was linear to I₂ concentration in the range of 0.5×10^-6-33×10^-6 mol/L. Thus, a highly sensitive and selective spectrophotometric method was proposed to detect O₃ in the air, since the concentration of O₃ was equal to that of I₂ in this reacted system.

• Periodical: Applied Mechanics and Materials (Volume 319)
• Pages: 178-181
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.319.178
• Online since: May 2013
• Authors: Chen Yin Lin, Gui Qing Wen, Ai Hui Liang, Zhi Liang Jiang
• Keywords: Association Particle, O₃, Rhodamine 6G, Spectrophotometry

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