Sensitive Spectrofluorimetric Determination of Cytochrome c with Spirocyclic Rhodamine B Hydrazide in Micellar Medium |
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Authors: | Yehua Shen Xiao-Feng Yang Yao Wu Cong Li |
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Institution: | (1) Department of Chemistry, Northwest University, Xi’an, 710069, China |
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Abstract: | A new spectrofluorimetric method for the determination of cytochrome c using spirocyclic rhodamine B hydrazide (RBH) as fluorogenic
reagent in the presence of sodium dodecylbenzene sulfonate (SDBS) surfactant micelles was developed. The method was based
on the reaction of cytochrome c with RBH, a colorless, nonfluorescent spirolactam of rhodamine B in SDBS micelles to give
highly fluorescent rhodamine B and hence led to a large increase in fluorescence intensity. The dynamic range and detection
limit for the determination of cytochrome c are 4.0–120 ng ml−1 and 0.87 ng ml−1 (3σ), respectively. The optimal conditions for the detection of cytochrome c were evaluated and the possible detection mechanism
was also discussed. |
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Keywords: | Cytochrome c Rhodamine B hydrazide SDBS Spectrofluorimetry |
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