Fluorescence enhancement of rhodamine B as a tool for the determination of trace and ultra-trace concentrations of bismuth using dispersive liquid–liquid microextraction

Al-Saidi, Hamed M.; El-Bindary, A.A.; El‐Sonbati, A.Z.; Abdel-Fadeel, M.A.

doi:10.1039/c5ra27764g

Cited by 16 publications

(3 citation statements)

References 29 publications

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“…Using fluorescence enhancers, such as CMC the fluorescence intensity of RCNP product increased by a factor of about 100% . This encouraged us to develop a simple, sensitive and selective spectrofluorometric method for the determination of CNP commercial tablets and drops.…”

Section: Introductionmentioning

confidence: 99%

Spectrofluorometric determination of clonazepam in dosage forms: Application to content uniformity testing and human plasma

et al. 2017

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The present paper describes a developed and validated simple, highly sensitive and cost-effective spectrofluorometric method for determination of clonazepam (CNP). The proposed method depends on forming a highly fluorescent product through the reduction of CNP with Zn/HCl. The produced fluorophore exhibits a strong fluorescence at λ 350 nm after excitation at λ 250 nm. The use of carboxymethylcellulose (CMC) greatly enhanced the fluorescence intensity of the produced fluorophore to the extent of about 100%. Calibration curve showed good linear regression (r > 0.9998) within test ranges of 20-400 ng ml with a lower detection limit of 0.67 ng ml and lower quantification limit of 2.22 ng ml upon using CMC. The method was successfully applied to the analysis of CNP in its pharmaceutical formulations and the results were in agreement with those obtained using a reference method. Furthermore, the content uniformity testing of the tablets was also performed. The application of the proposed method was extended to determine CNP in spiked human plasma sample as a preliminary investigation and the results were satisfactory.

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Section: Introductionmentioning

confidence: 99%

Spectrofluorometric determination of clonazepam in dosage forms: Application to content uniformity testing and human plasma

et al. 2017

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“…Fluorescent sensors based on organic dyes are particularly suited for the analysis of Hg 2+ ion and other cations [4][5][6]. This type of sensor includes an ion recognition unit (ionophore) which triggers modification of the fluorescence features of an organic fluorophore.…”

Section: Introductionmentioning

confidence: 99%

Sub-ppb mercury detection in real environmental samples with an improved rhodamine-based detection system

Singh

Coulomb

Boudenne

et al. 2021

Talanta

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A new procedure is described for the determination of Hg 2+ ions in water samples. A Rhodamine based fluorescent sensor was synthesized and the experimental conditions were specifically optimized for application to environmental samples, which requires low detection limits and high selectivity in competitive experiments with realistic concentrations of other metal ions. Incorporation of a Rhodamine-6G fluorophore to a previously described sensor and optimization of the buffer system (detection with acetic acid at pH 5.25) enabled significant enhancement of the sensitivity (detection limit = 0.27 µg.L -1 ) and selectivity. The optimized procedure using high-throughput microplates has been applied to tap and river waters with good results.

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“…On the other hand, arising from the abundant energy lever configuration, the fluorescence property of bismuth based materials is also widely discussed in the optics and materials fields. − Especially, the luminescence phenomenon makes it possible to act as a fluorescence imaging probe. − Compared with the X-ray CT, the fluorescence imaging causes little harm to the human body and could be conducted multiple times within a short time, which is more preferred to the demand for tracing of tumor metastasis. − Due to the complementary advantages of each technology, the multimode imaging can improve the diagnosis accuracy. − However, the large density of the Bi also makes it hard to disperse in the hydrophilic solvent, which is the main challenge for its bioapplication. From this concern, tailoring materials to nanoscale with small size such as nanoparticles, quantum dots, and nanoclusters is regarded as an effective way.…”

Section: Introductionmentioning

confidence: 99%

Bismuth Nanoparticles with “Light” Property Served as a Multifunctional Probe for X-ray Computed Tomography and Fluorescence Imaging

Dong

et al. 2018

Chem. Mater.

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The development of the advanced imaging probe holds the key to the achievement of target imaging and metastasis tracing. The bismuth based nanoprobe has been regarded as the most promising X-ray computed tomography probe due to its largest X-ray attenuation coefficient. Accordingly, the bismuth nanoparticles with controllable size distribution and light weight have been fabricated through a one pot synthesis strategy. The surface modification can be easily conducted with the polyethylene glycol to make the nanoparticles hydrosoluble and biocompatible. More importantly, the Bi nanoparticles can be excited by light to conduct excitation wavelength dependent emission in the visible (Vis) and near-infrared (NIR) region, which makes it possible to utilize it for fluorescence imaging. Under the detection of the multimode CT/fluorescence imaging, the long circulation time of the Bi nanoparticles and its specific accumulation at the liver and intestine can be visually displayed. The facile and large scale preparation method, unique luminescence property, and multimode imaging function endow the Bi nanoparticles with promising applications in clinical diagnosis.

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Fluorescence enhancement of rhodamine B as a tool for the determination of trace and ultra-trace concentrations of bismuth using dispersive liquid–liquid microextraction

Abstract: The present work describes a simple, sensitive, selective, and eco-friendly spectrofluorimetric method for bismuth determination in wastewaters and dyed scalp hair.

Cited by 16 publications

References 29 publications

Spectrofluorometric determination of clonazepam in dosage forms: Application to content uniformity testing and human plasma

Spectrofluorometric determination of clonazepam in dosage forms: Application to content uniformity testing and human plasma

Sub-ppb mercury detection in real environmental samples with an improved rhodamine-based detection system

Bismuth Nanoparticles with “Light” Property Served as a Multifunctional Probe for X-ray Computed Tomography and Fluorescence Imaging

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