Simeprevir (SPV) is a powerful antihepatitis C virus agent that was newly introduced into the pharmaceutical market. We here established and validated an easy, simple, and sensitive spectrofluorimetric method for its estimation at λ 427 nm (λ 337 nm). The suggested procedure was based on two times enhancement in the original emission of SPV through modifying its microenvironment in buffered aqueous solution by adding Triton X-100. The relationship between the concentration of SPV and the observed fluorescence intensity was linear in the range 0.06-1.0 μg ml with a correlation coefficient of 0.9997. The limits of detection and quantitation were 21 and 64 ng ml , respectively. The present method was effectively applied to quantify SPV content in pharmaceutical tablets and human plasma spiked with the drug with no interference from tablet excipients or plasma components.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/bio.3739 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Highly Sensitive Spectrofluorimetric and Colorimetric Quantitation of Neomycin Using Nanosilver-Fluorescein Hybrid: A Comprehensive Assessment of Greenness and Blueness.
Luminescence
January 2025
Pharmaceutical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
Two versatile yet simple methods, colorimetric and spectrofluorimetric, were utilized for the quantitation of nonchromophore neomycin using silver nanoparticles modified with fluorescein. Fluorescein was excited at 485 nm (emission at 515 nm); when it is deposited on the surface of silver nanoparticles, its fluorescence intensity at 515 nm is quenched. Neomycin restores the fluorescence level at 515 nm by displacing fluorescein from nanoparticle binding sites.
View Article and Find Full Text PDFGreen Assessment of Sensitive Spectrofluorimetric Methods for Simultaneous Estimation of Formoterol Fumarate and Fluticasone Propionate Using a Micelle-Mediated Approach.
J Fluoresc
January 2025
Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr Al-Aini Street, Cairo, 11562, Egypt.
Highly sensitive spectrofluorimetric methods were developed for the quantitative estimation of formoterol fumarate dihydrate (FFD) and fluticasone propionate (FP) in both authentic raw materials and marketed dosage forms using a micellar-enhanced spectrofluorimetric approach. The proposed methods are based on the determination of FP in the presence of FFD using the first derivative emission spectrofluorimetry. The peak amplitude of the emission spectra of the formed micellar fluorescence was measured at 465 nm after excitation at 236 nm (λ max of FP).
View Article and Find Full Text PDFDevelopment of a Novel Synchronous Spectrofluorimetric Method Coupled With Chemometric Modelling for Ultrasensitive Analysis of Tenofovir and Dolutegravir With Implication for Pharmacokinetic Studies.
Luminescence
January 2025
Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt.
This study introduces a novel synchronous spectrofluorimetry coupled with chemometric tools for the determination of tenofovir and dolutegravir antiretroviral drugs. Utilizing partial least squares regression (PLS) fine-tuned by genetic algorithm as variable selection tool, the developed models demonstrate greater sensitivity, cost-effectiveness, and reduced environmental impact compared to traditional HPLC methods. The model's validation was further confirmed using external validation in addition to QC samples as per ICH M10 guidelines, which yielded high accuracy ranged between 94.
View Article and Find Full Text PDFDevelopment and Validation of a Green Spectrofluorimetric Method for Nateglinide Quantification: Utilizing AR87 as a Probe With Box-Behnken Optimization and Quantum Mechanical Calculations.
Luminescence
January 2025
Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt.
In this study, a sensitive and selective spectrofluorimetric method was developed for the determination of the antidiabetic drug nateglinide based on its reaction with the xanthene dye acid red 87 (AR87). A fluorescence quenching process was observed for the AR87 at 545 nm upon the addition of nateglinide, which was exploited for the quantitative analysis. The reaction mechanism was investigated using quantum mechanical calculations suggesting a transfer between the electron-rich AR87 and the electron-deficient nateglinide.
View Article and Find Full Text PDFApplication of a nucleophilic substitution rection for spectrofluorimetric quantification of ketamine in pharmaceutical and plasma matrices.
Sci Rep
December 2024
Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Nasr City, 11751, Cairo, Egypt.
Ketamine is a dissociative anesthetic drug that is abused by teenagers and young adults, commonly for recreational purposes in dance clubs, to generate euphoria and dissociation, and sometimes employed as a date-rape drug. Herein, a highly sensitive, and environmentally friendly spectrofluorimetric method was developed for detection of ketamine in pharmaceutical and plasma samples. The technique is based on a nucleophilic substitution reaction occurring between ketamine and NBD-Cl (4-chloro-7-nitrobenzo-2-oxa-1,3-diazole), resulting in the formation of a fluorescent derivative that exhibits detectability at a remarkable level.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!