Spectrofluorimetric determination of trace amount of coenzyme II using ciprofloxacin–terbium complex as a fluorescent probe

Bian, Weiwei; Wang, Yusheng; Zhu, Xiaojing; Jiang, Chongqiu

doi:10.1016/j.jlumin.2005.08.013

Cited by 8 publications

(4 citation statements)

References 23 publications

(22 reference statements)

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“…The effect of flow rate is another important parameter in CL detection. Since in this method, the time consumed to transfer the reactive species into the sample cell has played a critical role to collect the maximum emitted light [25]. Hence, the flow rates between 1.0 and 4.5 ml/min were studied, while equal flow rates were maintained in each channel of both pumps.…”

Section: Flow Ratementioning

confidence: 99%

CL sensitisation of tris‐(bipyridyl) ruthenium (II) – cerium (IV) reaction system by AgNPs for determination of GFX

Wabaidur

Alam

2018

IET nanobiotechnol.

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The flow injection combined with tris-(bipyridyl) ruthenium (II)-cerium (IV) chemiluminescence (CL) method based on the sensitisation of silver nanoparticles (AgNPs) has been established for the quantitative analysis of gatifloxacin (GFX). AgNPs were synthesised using the reaction between ammonia gas and silver nitrate solution and was used to increase the CL intensity of the proposed system. The enhancement of CL intensity was linear with the concentration of GFX added. Effects of different experimental parameters were studied. Under the optimal conditions, the linear relationship was established between the concentration range of 1.4 × 10-4.5 × 10 M, with the correlation coefficient (r) 02E9999. The limit of detection was found to be 4.6 × 10 M. The relative standard deviation obtained was 3.2% for six replicate measurements of GFX (1.2 × 10 M). The proposed CL method was applied to the commercial drug and the result was in agreement with the labelled amount. The technique was further adopted to the analysis of GFX in spiked urine samples. Negligible interference was found (variation in CL intensity <5%) from a few common foreign excipients applied in preparation of pharmaceutical drug. The comparative results with a few reported methods indicates that the proposed method is more sensitive than other methods..

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Section: Flow Ratementioning

confidence: 99%

CL sensitisation of tris‐(bipyridyl) ruthenium (II) – cerium (IV) reaction system by AgNPs for determination of GFX

Wabaidur

Alam

2018

IET nanobiotechnol.

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“…The time taken to transfer the excited product into the flow cell is critical for maximum collection of the emitted light [38] . In order to achieve maximum CL intensity, total flow rates between 1 and 4.5 ml/min were tested with equal flow rates in each channel of both pumps.…”

Section: +mentioning

confidence: 99%

Flow Injection Determination of Moxifloxacin using Silver Nanoparticles with Tris(2,2-Bipyridyl)Ruthenium(III)-Ce(IV) Chemiluminescence Detection

Wabaidur¹,

Alam²,

ALOthman³

et al. 2017

pharmaceutical-sciences

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Wabaidur and Alam: Moxifloxacin Analysis using Ru(bipy) 3 2+-Ce(IV) Chemiluminescence System Silver nanoparticles were synthesized and applied to sensitize Ru(bipy) 3 2+-Ce(IV) chemiluminescence system for the quantitative estimation of moxifloxacin. Prior to the experiment, silver nanoparticles were prepared using the well-reputed aqueous-gaseous phase reaction between ammonia and solution of silver nitrate. The utilization of silver nanoparticle was found to have enhanced effect on the weak chemiluminescence intensity of Ru(bipy) 3 2+-Ce(IV) system. Additionally, the enrichment of the intensity was linearly proportional to the concentration of target compound. The effects of different experimental parameters were checked to obtain best results. Under the ideal experimental conditions, the linearity of the proposed method was obtained over the moxifloxacin concentration range of 5.6×10 -9 -2.2×10 -6 M with the correlation coefficient (r 2 ) value 0.9998. The detection limit was found to be 1.5×10-9 M and the relative standard deviation calculated from five replicate measurements was 2.1%. The interference from various foreign species for the analysis of moxifloxacin was tested since they may suppress or enhance the chemiluminescence signal. The obtained quality parameters and no significant interference effect on the intensity confirm that the method is reproducible, simple and could be applied for the successful evaluation of moxifloxacin in commercial tablet and human urine.

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“…3, it can be elucidated that energy transfer occurred easily between LVX and Tb(III) because of the strong spectral overlap between the FL spectra of the donor, LVX, and the excitation spectra of the acceptor, Tb (III). It is well reported that the coordination number of Tb(III) is generally eight (19). Therefore, it can be suggested that there are unfilled sites on Tb(III).…”

Section: Spectral Characteristicsmentioning

confidence: 99%

Gold nanoparticles‐based fluorescence enhancement of the terbium–levofloxacin system and its application in pharmaceutical preparations

et al. 2011

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A sensitive fluorescence (FL) technique is proposed for the determination of levofloxacin (LVX). The method is based on the fact that the weak FL signal of the Tb(III)-LVX system is strongly enhanced in the presence of gold nanoparticles. Gold nanoparticles were prepared by the citrate reduction of HAuCl(4) and characterized by transmission electron microscopy (TEM). Levofloxacin and Tb(III) ion form a fluorescence complex in aqueous solution, and its maximum emission wavelength was found at 545 nm. Optimal conditions for the formation of the levofloxacin-Tb(III) complexes were studied. Levofloxacin was detected by measuring the FL intensity, which increases linearly with the concentration of LVX in the range 6.2 × 10(-10)-2.6 × 10(-8) mol/L. Recovery of the target analytes was > 96% with good quality parameters: linearity (r(2) > 0.996), limit of detection (LOD) and limit of quantification (LOQ) values 2.1 × 10(-10) mol/L and 7.2 × 10(-10) mol/L, and run-to-run and day-to-day precisions with relative standard deviations (RSDs) around 3%. Thus, the proposed method can be successfully applied to the routine determination of levofloxacin in pharmaceutical preparations.

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Spectrofluorimetric determination of trace amount of coenzyme II using ciprofloxacin–terbium complex as a fluorescent probe

Cited by 8 publications

References 23 publications

CL sensitisation of tris‐(bipyridyl) ruthenium (II) – cerium (IV) reaction system by AgNPs for determination of GFX

CL sensitisation of tris‐(bipyridyl) ruthenium (II) – cerium (IV) reaction system by AgNPs for determination of GFX

Flow Injection Determination of Moxifloxacin using Silver Nanoparticles with Tris(2,2-Bipyridyl)Ruthenium(III)-Ce(IV) Chemiluminescence Detection

Gold nanoparticles‐based fluorescence enhancement of the terbium–levofloxacin system and its application in pharmaceutical preparations

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