Fluorescence resonance energy transfer disposable sensor for copper(II)

Cano-Raya, C.; Fernández-Ramos, M.D.; Capitán-Vallvey, L.F.

doi:10.1016/j.aca.2005.09.011

Cited by 41 publications

(22 citation statements)

References 34 publications

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“…The detection limit of the biosensor was calculated to be 0.95 μM by using 3S b /m criteria, where m is the slope of the calibration curve and S b is the standard deviation of the responses (n = 10) from 2.5 μM Cu 2+ . Table 1 shows a comparison of analytical parameters such as the linear range and detection limit of some sensors and biosensors developed for copper assay [27,28] and [32][33][34][35][36][37][38][39][40]. The biosensor offers attractive properties compared to some of previous studies such as high sensitivity, a wide linear range (2.5 μM-20.0 μM), and low detection limit (0.95 μM).…”

Section: Linear Range Of the Biosensormentioning

confidence: 98%

Do copper ions activate tyrosinase enzyme? A biosensor model for the solution

Akyılmaz

Yorganci

Asav

2010

Bioelectrochemistry

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Section: Linear Range Of the Biosensormentioning

confidence: 98%

Do copper ions activate tyrosinase enzyme? A biosensor model for the solution

Akyılmaz

Yorganci

Asav

2010

Bioelectrochemistry

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“…9 On the basis of fluorescence quenching, a number of fluorescence molecular sensors of Cu(II) have been developed during the last several years. [10][11][12] However, no previously published papers have mentioned about Cu(II) determination using natural porphyrins.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence Quenching of Pheophytin‐a by Copper(II) Ions

Ming-bo

Chen

et al. 2009

Chin. J. Chem.

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A method was developed for determination of Cu(II) ions quantitatively by measuring fluorescent intensity of pheophytin-a (Pheoa) solution. The Pheoa was obtained by de-intercalation of magnesium from the porphyrin ring of chlorophyll-a (Chla) extracted from fresh spinach leaves. Its two UV-Vis absorption peaks at 505 and 535 nm in acetone solution have been observed but disappeared when the acetone solution of Pheoa was mixed with a Cu(II) ion aqueous solution. A fluorescence quenching phenomenon was thus observed when the acetone solution of Pheoa was mixed with an aqueous solution of Cu(II) ions. However, other physiologically relevant cations rarely caused any quenching fluorescence of Pheoa under the same experimental conditions. Kinetics of the fluorescence fading process was investigated by measuring the effects of Cu(II) ion concentration, reaction time and reaction temperature on the fluorescence intensity of the Pheoa acetone solution. An activation energy of (10±1) kJ•mol -1 was estimated from Arrhenius empirical relation assuming that the interaction between the Pheoa and the Cu(II) ions was the first order reaction. The calibration graph obtained with the fluorescence was linear over the Cu(II) concentration range of 8.0×10-5 -8.0×10 -7 mol•dm -3 with a detection limit of 8.0×10 -7 mol•dm -3 for Cu(II)ion.

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“…Several methods have been already developed for the determination of copper ion with its own advantages and limitations. Measurement techniques include cathodic stripping voltammetry [1,3], anodic stripping voltammetry [2], chemiluminescence (CL) [4], ion-selective electrode [5], ion chromatography [6], atomic absorption spectroscopy [7][8][9], atomic emission spectrometry [10] and fluorescence [11].…”

Section: Introductionmentioning

confidence: 99%