Abstract − Analytical Sciences, 19(12), 1643 (2003).
Flow-Injection Chemiluminescence Determination of Formaldehyde with a Bromate-Rhodamine 6G System
Baoxin LI, Meilin LIU, Zhujun ZHANG, and Chunli XU
Department of Chemistry, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an, 710062, P. R. China
In this paper, a novel flow-injection chemiluminescence (CL) system for the determination of formaldehyde is described. It is based on a strong enhance effect of formaldehyde on the weak CL emission of the reaction between potassium bromate and rhodamine 6G in a sulfuric acid medium. A possible mechanism for this CL reaction is proposed. A CL calibration graph was linear in the range of 0.8 - 200 μg l-1 and the detection limit was 0.3 μg l-1 (3σ). The relative standard deviation was less than 3% for 10 μg l-1 formaldehyde (n = 11). The method has been applied to determine formaldehyde in the air samples.
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