Flow-injection chemiluminescence determination of formaldehyde with a bromate-rhodamine 6G system. |
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| Authors: | Baoxin Li Meilin Liu Zhujun Zhang Chunli Xu |
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| Affiliation: | Department of Chemistry, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an, 710062, PR China. |
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| Abstract: | 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 microg l(-1) and the detection limit was 0.3 microg l(-1) (3sigma). The relative standard deviation was less than 3% for 10 microg l(-1) formaldehyde (n = 11). The method has been applied to determine formaldehyde in the air samples. |
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