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Issue 9, 2014
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Study of the interaction between laevorotatory-isoleucine and a composite fluorescent probe of Pd(ii)

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Abstract

In a Kolthoff buffer solution (pH = 10.7), the fluorescence intensity of acridine red, which is quenched by Pd2+, can be enhanced by adding a certain amount of laevorotatory-isoleucine (L-isoleucine). Therefore, we have established a fluorescence spectrometry method for the detection of L-isoleucine. When the excitation slit width is 5 nm and emission slit width is 10 nm, we obtain the following results: the linear regression equation: F = −33.884 + 468.07C (mg L−1), the correlation coefficient: R = 0.9984, linear range: 0.125–1.375 mg L−1 and the detection limit: 0.00027 mg L−1. Furthermore, we calculate the association constants of Pd2+–acridine red (k1 = 1.62 × 102) and Pd2+–isoleucine (k2 = 7.04 × 102) using a spectrophotometric method.

Graphical abstract: Study of the interaction between laevorotatory-isoleucine and a composite fluorescent probe of Pd(ii)

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Supplementary files

Article information


Submitted
08 Dec 2013
Accepted
10 Feb 2014
First published
10 Feb 2014

Anal. Methods, 2014,6, 3095-3100
Article type
Paper
Author version available

Study of the interaction between laevorotatory-isoleucine and a composite fluorescent probe of Pd(II)

D. Cheng, H. Zhu and Q. Liu, Anal. Methods, 2014, 6, 3095
DOI: 10.1039/C3AY42181C

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