Chemiluminescence flow system for the determination of sulfite |
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Authors: | Wei Qin Z-J Zhang and Cheng-Jie Zhang |
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Institution: | (1) Department of Chemistry, Nanjing University, Nanjing 210008, P.R. China, CN;(2) Department of Chemistry, Shaanxi Normal University, Xi’an 710062, P.R. China, CN |
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Abstract: | A novel chemiluminescence(CL) flow system for sulfite is described based on electrostatically immobilized luminol on an anion
exchange column. Sulfite is detected by the CL reaction with luminol bleeding from the column by hydrolysis. The calibration
graph is linear in the range 3 × 10–7 to 1 × 10–5 mol/L, and the detection limit is 1 × 10–7 mol/L. Interfering metal ions co-existing 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%. The system
could be reused for over 50 h and has been applied successfully to the determination of sulfur dioxide in air.
Received: 21 October 1997 / Revised: 23 February 1998 / Accepted: 26 February 1998 |
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