Citation: Hui Chen, Li Li, Min Zhou, Yong Jun Ma. Flow-injection chemiluminescence determination of tryptophan using galangin-potassium permanganate-polyphosphoric acid system[J]. Chinese Chemical Letters, ;2008, 19(2): 203-206. doi: 10.1016/j.cclet.2007.10.050 shu

Flow-injection chemiluminescence determination of tryptophan using galangin-potassium permanganate-polyphosphoric acid system

College of Chemistry and Chemical Engineering, Gansu Key Laboratory of Polymer Materials, Northwest Normal University, Lanzhou 730070, China

Received Date: 27 August 2007

Fund Project: We are grateful to Natural Scientific Foundation of Gansu province, China (No. 3ZS051-A25-097) and Scientific Research Foundation of Gansu Administration of Education, China (No. 0501-07) for supporting the research work.

A high sensitive flow-injection chemiluminescence (FI-CL) method for the determination of tryptephan has been developed.The method is based on the chemiluminescence reaction of galangin-potassium perrnanganate-tryptophan in polyphosphoric acid (PPA) media.Under the optimized conditions, tryptophan was determined in the range 0.05-10 μg/mL with the detection limit (3σ) of 5.0×10^-3 μg/mL.The relative standard deviation (RSD) was 1.0% for 11 replicate determinations of 1.0 μg/mL tryptophan.Three synthetic samples were determined selectively with recoveries in the range from 99.6% to 102.0% in the presence of other amino acids.
- Chemiluminescence,
- Flow-injection,
- Galangin,
- Potassium permanganate,
- Tryptophan
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