Li Li Na, Li Nian Bing, Luo Hong Qun
School of Chemistry and Chemical Engineering, Southwest China Normal University, Chongqing, 400715, China.
Anal Sci. 2005 Aug;21(8):963-6. doi: 10.2116/analsci.21.963.
A simple, sensitive and rapid flow-injection chemiluminescence method has been developed for the determination of ferulic acid based on the chemiluminescence reaction of ferulic acid with potassium permanganate in a nitric acid medium. A strong chemiluminescence signal was observed when ferulic acid was injected into an acidic potassium permanganate solution in a flow-cell. The present method allowed the determination of ferulic acid in the concentration range of 6.0 x 10(-6) to 2.0 x 10(-4) mol l(-1); the detection limit (3sigma) for ferulic acid was 9.6 x 10(-8) mol l(-1). The relative standard deviation was 1.0% for 11 replicate analyses of 2.0 x 10(-4) mol l(-1) ferulic acid. The proposed method was applied to the determination of ferulic acid in real samples with satisfactory results. Moreover, the reaction mechanism of the chemiluminescence system was primarily considered.
基于阿魏酸与高锰酸钾在硝酸介质中的化学发光反应，开发了一种简单、灵敏且快速的流动注射化学发光法用于测定阿魏酸。当将阿魏酸注入流通池中的酸性高锰酸钾溶液时，观察到强烈的化学发光信号。本方法可测定浓度范围为6.0×10⁻⁶至2.0×10⁻⁴ mol·L⁻¹的阿魏酸；阿魏酸的检测限（3σ）为9.6×10⁻⁸ mol·L⁻¹。对2.0×10⁻⁴ mol·L⁻¹阿魏酸进行11次重复分析，相对标准偏差为1.0%。该方法应用于实际样品中阿魏酸的测定，结果令人满意。此外，还初步探讨了化学发光体系的反应机理。
