Terbium-sensitized luminescence: a selective and versatile analytical approach

Gómez‐Hens, A.; Aguilar-Caballos, M.P.

doi:10.1016/s0165-9936(01)00139-x

Cited by 43 publications

(22 citation statements)

References 95 publications

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“…The excitation wavelength used was 337.1 nm, provided by the N 2 -laser excitation source, choosing 545 nm as emission wavelength. The use of synergetic agents can remove water molecules surrounding the lanthanide ion inside its coordination sphere, allowing an enhancement of the luminescence intensity [12]. Different mixtures of TOPO, CPC, EDTA and SDS were assayed in the range 1-100 mmol L −1 for this purpose.…”

Section: Resultsmentioning

confidence: 99%

“…These features have given rise to the development of relatively sensitive and selective methods for the determination of different organic compounds, such as fluoroquinolones (FQs) [12]. The interest in the determination of FQs from an environmental point of view is due to their wide use as broad spectrum antibiotics, which generate residues that are expected to enter the environment.…”

Section: Introductionmentioning

confidence: 99%

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Determination of fluoroquinolone antibiotics by microchip capillary electrophoresis along with time-resolved sensitized luminescence of their terbium(III) complexes

2014

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We report on the time-resolved detection of the three fluoroquinolone (FQs) antibiotics ciprofloxacin (CIP), enrofloxacin (ENR) and flumequine (FLU). On addition of terbium(III) ions, the terbium(III)-FQs chelates are formed insitu in an on-capillary derivatization reaction of a microfluidic system. The laser-induced terbium(III)-sensitized luminescence of the chelates is measured at excitation/emission wavelengths of 337/545 nm. The analytes can be separated and quantified within less than 4 min. A solid phase extraction step for analyte preconcentration can be included prior to chelation and microchip capillary electrophoresis. The analytical ranges of the calibration graphs for CIP, ENR and FLU are from 10.6 to 60.0, 10.3 to 51.0, and 11.5 to 58.8 ng mL −1 , respectively, and the detection limits are 3.2, 3.1 and 3.6 ng mL −1 , respectively. The precision was established at two concentration levels of each analyte and revealed relative standard deviations in the range from 3.0 to 10.2 %. The method was applied to the analysis of FQ-spiked water samples.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination of fluoroquinolone antibiotics by microchip capillary electrophoresis along with time-resolved sensitized luminescence of their terbium(III) complexes

2014

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“…The transfer of intermolecular energy from ligands to Tb 3+ is a well-known phenomenon. [13][14][15] Tb 3+ complex with deferasirox has been previously studied by Manzoori et al 12 They reported that intense fluorescence can be generated from the Tb-Def complex. Here, we investigate Tb-Def complex formation and its fluorescence characteristics in the presence of Au and AgNPs.…”

Section: Terbium(iii) Interaction With Deferasirox In the Presence Ofmentioning

confidence: 99%

“…[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] However, a further improvement of sensitivity of these methods would allow the detection of even lower analyte concentrations. Therefore, the combination of amplification strategies with lanthanide luminescence is a highly promising approach.…”

Section: Introductionmentioning

confidence: 99%

Ag Nanoparticles-enhanced Fluorescence of Terbium-Deferasirox Complexes for the Highly Sensitive Determination of Deferasirox

Abolhasani

Naderali

2016

ANAL. SCI.

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We describe the effect of different sized gold and silver nanoparticles on the terbium sensitized fluorescence of deferasirox. It is indicated that silver nanostructures, especially 18 nm Ag nanoparticles (AgNPs), have a remarkable amplifying effect compared to Au nanoparticles. Based on this observation, a highly sensitive and selective method was developed for the determination of deferasirox. Effects of various parameters like AgNPs and Tb 3+ concentration and pH of media were investigated. Under the optimal conditions, a calibration curve was plotted as the fluorescence intensities versus the concentration of deferasirox in the range of 0.1 to 200 nmol L -1 , and detection limit of 0.03 nmol L -1 was obtained. The method has good linearity, recovery, reproducibility and sensitivity, and was satisfactorily applied for the determination of deferasirox in urine and pharmaceutical samples.

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“…Either the lanthanide ion or the ligand can thus be determined sensi- tively. Such an approach avoids the relatively low sensitivity of other phosphorimetric alternatives and has led to numerous applications in as many fields [11][12][13][14][15], especially in optical imaging-based clinical diagnostics [16,17].…”

Section: Introductionmentioning

confidence: 99%