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[Determination of sulfur dioxide in traditional Chinese medicine by derivative fluorometry]
Yue Peng1, Xue-Lian Li, Ling Yin
1Laboratory Constructed by PRC and Sichuan Province in Systematically Research and Development Utilization of Traditional Chinese Medicine Resources, Department of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China. youwell-done@163.com
Objective:
To establish a derivative fluorometry method for the determination of sulfur dioxide residues in traditional Chinese medicine.
Method:
The optimal derivation condition was established. The fluorescence intensity was detected at excitation wavelength of 321 nm, and emission wavelength of 384 nm.
Result:
A linear relationship was obtained between the fluorescence intensity and the addition of reference substance in the range of 0.999 7-17.99 nmol with a correlation coeffient of 0.999 9, and the average recovery was 102.3% with RSD 4.6%.
Conclusion:
This method is simple and sensitive with quick and correct result. It can provide a reference for the determination of sulfur dioxide residues in traditional Chinese medicine.
