Abstract.
A new flow-injection procedure has been developed for the determination of salicylic acid based on the enhancement of the chemiluminescence from the cerium(IV)–Tween 20 reaction by salicylic acid in acidic medium. The method is simple, selective and sensitive with a detection limit of 2.5×10–9 g mL–1. It is applicable to the determination of salicylic acid in the concentration range of 4.0×10–9–1.1×10–6 g mL–1. The relative standard deviation (RSD) is 0.85% for 4.0×10–7 g mL–1 salicylic acid (n=11). The method has been successfully applied to the determination of salicylic acid in bactericidal solutions. Furthermore, it is suggested that light emission from cerium(IV)–Tween 20 reaction is probably because of the formation of singlet oxygen 1O2 * and the emitter is excited oxygen molecular pairs O2(1Δg)O2(1Σg –).
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Cui, H., Li, S., Li, F. et al. A novel chemiluminescent method for the determination of salicylic acid in bactericidal solutions. Anal Bioanal Chem 372, 601–604 (2002). https://doi.org/10.1007/s00216-001-1124-7
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DOI: https://doi.org/10.1007/s00216-001-1124-7