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Bekele H, Yohannes W, Megersa N. A Highly Selective Analytical Method Based on Salt-Assisted Liquid-Liquid Extraction for Trace-Level Enrichment of Multiclass Pesticide Residues in Cow Milk for Quantitative Liquid Chromatographic Analysis. Int J Anal Chem 2023; 2023:1754956. [PMID: 37810912 PMCID: PMC10558272 DOI: 10.1155/2023/1754956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 09/09/2023] [Accepted: 09/20/2023] [Indexed: 10/10/2023] Open
Abstract
In this study, a simple, inexpensive, selective, and fast salting-out assisted liquid-liquid extraction (SALLE) technique coupled with high-pressure liquid chromatography-diode array detection (HPLC-DAD) was developed for the extraction, preconcentration, and analysis of trace level seven multiclass pesticide residues in pasteurized and raw cow milk samples. The significant factors that affect the extent to which the target analytes are extracted, such as the type of extraction solvent and its volume, the type and concentration of salting-out salts, the pH of the solution, and the extraction time, have been investigated. Under optimum conditions, the correlation coefficient (r2) was obtained within a range of 0.9982-0.9997 for a broad linear range concentration of 2-1500 ng·mL-1. Reliable sensitivity was achieved with limits of detection (LODs) and limits of quantification (LOQs) ranging from 0.58-2.56 ng·mL-1 and 1.95-8.51 ng·mL-1, respectively. While precision with interday and intraday in terms of relative standard deviations (RSDs) was observed in the range of 1.97 - 7.88% and 4.52 - 8.04%, respectively. The results of the precision studies reveal that good repeatability and reproducibility (RSDs <9) were achieved, thus showing a low variability extraction of the developed method. Finally, the proposed and validated approach was effectively used to extract and determine pesticide residues in real milk matrices; however, the target analytes were not detected in all samples.
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Affiliation(s)
- Habtamu Bekele
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
| | - Weldegebriel Yohannes
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
| | - Negussie Megersa
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
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Alqarni MH, Shakeel F, Mahdi WA, Foudah AI, Aljarba TM, Alshehri S, Ghoneim MM, Alam P. A Greener Stability-Indicating High-Performance Thin-Layer Chromatography Approach for the Estimation of Topiramate. MATERIALS (BASEL, SWITZERLAND) 2022; 15:1731. [PMID: 35268960 PMCID: PMC8911037 DOI: 10.3390/ma15051731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 02/20/2022] [Accepted: 02/22/2022] [Indexed: 12/23/2022]
Abstract
Despite various reported analytical methods for topiramate (TPM) analysis, greener analytical approaches are scarce in literature. As a consequence, the objective of the current research is to design a normal-phase stability-indicating high-performance thin-layer chromatography (SI-HPTLC) methodology for TPM analysis in marketed tablet dosage forms that is rapid, sensitive, and greener. TPM was derivatized densitometrically and analyzed at 423 nm in visible mode with anisaldehyde-sulfuric acid as the derivatizing agent. The greener SI-HPTLC technique was linear in the 30-1200 ng band-1 range. In addition, the suggested SI-HPTLC methodology for TPM analysis was simple, rapid, cheaper, precise, robust, sensitive, and environmentally friendly. The greener SI-HPTLC method was able to detect TPM along with its degradation products under acid, base, and oxidative degradation conditions. However, no TPM degradation was recorded under thermal and photolytic stress conditions. TPM contents in commercial tablet dosage forms were recorded as 99.14%. Using 12 different principles of green analytical chemistry, the overall analytical GREEnness (AGREE) score for the greener SI-HPTLC method was calculated to be 0.76, confirming the proposed normal-phase SI-HPTLC method's good greener nature. Overall, these results demonstrated that the suggested SI-HPTLC technique for TPM measurement in pharmaceutical products was reliable and selective.
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Affiliation(s)
- Mohammed H. Alqarni
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.H.A.); (A.I.F.); (T.M.A.)
| | - Faiyaz Shakeel
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (F.S.); (W.A.M.); (S.A.)
| | - Wael A. Mahdi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (F.S.); (W.A.M.); (S.A.)
| | - Ahmed I. Foudah
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.H.A.); (A.I.F.); (T.M.A.)
| | - Tariq M. Aljarba
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.H.A.); (A.I.F.); (T.M.A.)
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (F.S.); (W.A.M.); (S.A.)
| | - Mohammed M. Ghoneim
- Department of Pharmacy Practice, College of Pharmacy, AlMaarefa University, Ad Diriyah 13713, Saudi Arabia;
| | - Prawez Alam
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.H.A.); (A.I.F.); (T.M.A.)
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Deng W, Huang A, Zheng Q, Yu L, Li X, Hu H, Xiao Y. A density-tunable liquid-phase microextraction system based on deep eutectic solvents for the determination of polycyclic aromatic hydrocarbons in tea, medicinal herbs and liquid foods. Food Chem 2021; 352:129331. [PMID: 33652198 DOI: 10.1016/j.foodchem.2021.129331] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 01/24/2021] [Accepted: 02/07/2021] [Indexed: 12/24/2022]
Abstract
A novel density-tunable liquid-phase microextraction (DT-LPME) system was developed with high-density deep eutectic solvents (DESs) as extractant and low-density organic solvents as emulsifier and density regulator. DES-rich phase was induced to form in the bottom or in the top by adjusting the emulsifier amount. This system was used to directly extract polycyclic aromatic hydrocarbons (PAHs) from liquid and solid foods, and the obtained DES-rich phase was easy to be collected for quantification. The method (LPME with HPLC-fluorescence detector) has linearity (R2 > 0.9974), detection limits of 0.6-4.2 ng L-1 for liquid foods and 0.05-0.35 ng g-1 for solid foods, recoveries of 86.2-114.9%, and intra-day/inter-day RSDs below 6.6%. The method was applied to detect PAHs in real samples, and the PAHs residue was found in honey and five solid foods. The DT-LPME method is simple, fast, green and suitable for direct extraction of analytes from both liquid and solid samples.
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Affiliation(s)
- Wenwen Deng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China; National 111 Center for Cellular Regulation and Molecular Pharmaceutics, School of Bioengineering and Food Science, Hubei University of Technology, Wuhan, Hubei, China
| | - Anqi Huang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China
| | - Qutong Zheng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China
| | - Long Yu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China
| | - Xiao Li
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China
| | - Hankun Hu
- Department of Pharmacy, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China.
| | - Yuxiu Xiao
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China.
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Almeida JMFD, Damasceno Júnior E, Silva EMF, Veríssimo LM, Fernandes NS. pH-responsive release system of topiramate transported on silica nanoparticles by melting method. Drug Dev Ind Pharm 2020; 47:126-145. [PMID: 33295812 DOI: 10.1080/03639045.2020.1862171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Incorporating drugs into silica matrices by the melting method can be applied to obtain drug delivery systems because they are governed by electrostatic type interactions, hydrogen bonding and hydrophilic-hydrophobic interactions between the drug and the silica surface. the melting method is an environmentally correct tool since it is free of organic solvent, low cost and with easy execution for the incorporation of drugs in silicas. Drugs delivery systems are very important for improving the treatment of chronic diseases. Topiramate (TPM) is a potent antiepileptic used in high daily doses as it has low bioavailability. In this context, silica nanoparticles (NPS) were used as an inorganic matrix for TPM transport in (in vitro) release studies. The TPM was incorporated into the NPS by hot melt loading employing a new carrier preparation methodology (NPS/TPM) using a thermobalance (by Thermogravimetry-TG) with high temperature control system. The release study using dissolution media simulating gastrointestinal at pH 1.2 (stomach) and 7.4 (intestine), showed that NPS release TPM in a prolonged and pH-responsive manner. The drug was released at intestinal pH ensuring greater absorption, allowing fewer daily doses and less adverse effects. The kinetic study demonstrated the best fit to the zero-order model proving the pH-responsive profile of the developed system.
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Affiliation(s)
- Janiele Mayara Ferreira de Almeida
- Laboratório de Química Analítica e Meio Ambiente, Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário Lagoa Nova, Natal-RN, Brasil
| | - Elmar Damasceno Júnior
- Laboratório de Química Analítica e Meio Ambiente, Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário Lagoa Nova, Natal-RN, Brasil
| | - Elania Maria Fernandes Silva
- Laboratório de Química Analítica e Meio Ambiente, Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário Lagoa Nova, Natal-RN, Brasil
| | - Lourena Mafra Veríssimo
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal do Rio Grande do Norte, Natal-RN, Brasil
| | - Nedja Suely Fernandes
- Laboratório de Química Analítica e Meio Ambiente, Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário Lagoa Nova, Natal-RN, Brasil
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