A Sensitive Chemiluminescence Flow System for the Determination of Sulfite
作者:
Yuming Huang,
Chao Zhang,
Xinrong Zhang,
Zhujun Zhang,
期刊:
Analytical Letters
(Taylor Available online 1999)
卷期:
Volume 32,
issue 6
页码: 1211-1224
ISSN:0003-2719
年代: 1999
DOI:10.1080/00032719908542890
出版商: Taylor & Francis Group
关键词: FIA;Chemiluminescence;Immobilized reagent;Sulfite;Sulfur dioxide
数据来源: Taylor
摘要:
A novel chemiluminescence (CL) flow system for sulfite with flow-injection analysis is presented in this paper. It is based on the weak chemiluminescence produced by auto-oxidation of sulfite in the presence of Rh6G, immobilized electrostatically on a cation exchange column. Tween 80 surfactant micelles showed a strong enhancement effect on this weak chemiluminescence. The system responds linearly to sulfite concentration in the range of 0.01-5 mg 1−1(r2=0.996) with a detection limit (3σ) of 0.01 mg 1−1. Interfering metal ions coexisting in sample solutions could be effectively eliminated on-line by an upstream cation exchanger. A complete analysis could be performed in 1 min with a relative standard deviation of less than 5% (n=11). The system is stable for over 500 determinations and has been successfully applied to the determination of sulfite in VK3injections and sulfur dioxide in air.
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