| 光谱学与光谱分析 |
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| Determination of Iron(Ⅲ) in Chinese Herbal Medicine and Tea Based on Fluorescence Quenching of 2,4-Dichro-Phenylfluorone |
| DAI Gang, AODENG Gao-wa |
| Institute of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China |
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Abstract A new spectrofluorimetric method for the determination of trace amount of Fe(Ⅲ) has been developed. This method is based on the fluorescence quenching of 2,4-dichro-phenylfluorone due to the formation of complex Fe(Ⅲ)-DCIPF. In pH 5.2-5.9 buffer solution, Fe(Ⅲ) and DCIPF react on each other to form a red complex. Its composition was established by method of continuous variations and molar-ratio as Fe(Ⅲ)∶DCIPF =1∶4, the excitation and emission wavelengths were found to be 282 and 560 nm, respectively. There is a linear relationship in the range 4-24 ng·mL-1 for Fe(Ⅲ). This method is simple and rapid, and has been applied to the determination of trace iron in Chinese herbal medicine and tea samples with satisfactory results．
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Received: 2003-02-16
Accepted: 2003-06-06
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Corresponding Authors:
DAI Gang
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| Cite this article: |
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DAI Gang,AODENG Gao-wa. Determination of Iron(Ⅲ) in Chinese Herbal Medicine and Tea Based on Fluorescence Quenching of 2,4-Dichro-Phenylfluorone [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(07): 848-850.
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| URL: |
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http://www.gpxygpfx.com/EN/Y2004/V24/I07/848 |
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