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Determination of L-phenylalanine by cucurbit[7]uril sensitized fluorescence quenching method |
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| Authors: | Chang Feng Li Li Ming Du Hao Wua Ying Xia Changa a Analytical Testing Center Shanxi Normal University Linfen China b School of Chemistry Materials Science China |
| Institution: | a Analytical and Testing Center, Shanxi Normal University, Linfen 041004, China;b School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, China |
| Abstract: | The determination method of L-phenylalanine（LPA） by fluorescence quenching was developed.The assay was based on the combination of the cucurbit7]uril（CB7]） with palmatine hydrochloride（PAL） reaction.In the presence of CB7],the fluorescence of PAL was quenched by LPA which can be employed to detect LPA.Under the optimal conditions,a linear range 3.63×10-8- 9.68×10-6mol/L and a detection limit 1.27×10-8mol/L of LPA were obtained.The relative standard deviation（R.S.D） was 1.8%obtained from a series of 11 standards each containing 6.05×10-6 mol/L of LPA.This paper also discusses the mechanism of fluorescence indicator probe. |
| Keywords: | L-phenylalanine Palmatine hydrochloride Cucurbit[7]uril Fluorescent probe |
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