A novel chemiluminescent method for the determination of salicylic acid in bactericidal solutions.
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 2.5x10(-9) g mL(-1). It is applicable to the determination of salicylic acid in the concentration range of 4.0x10(-9)-1.1x10(-6) g mL(-1). The relative standard deviation (RSD) is 0.85% for 4.0x10(-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(1delta(g))O2(1sigma(g)-).
Cui
Hua
H
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, People's Republic of China. hcui@ustc.edu.cn
Li
Shifeng
S
Li
Feng
F
Sun
Yugang
Y
Lin
Xiangqin
X
D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D017022:Flow Injection Analysis; D008163:Luminescent Measurements; D020156:Salicylic Acid / Q000032:analysis*; D012680:Sensitivity and Specificity; D012996:Solutions
D000900:Anti-Bacterial Agents; D012996:Solutions; D020156:Salicylic Acid