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El-Kimary EI, Korany MA, Issa AE, Basuny MG. Green Multiplex Chromatographic Determination of Nine Penicillin Antibiotics Residues in Industrial Air Dust and Wastewater Environmental Samples. J Chromatogr Sci 2023; 61:644-655. [PMID: 35523719 DOI: 10.1093/chromsci/bmac036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Indexed: 08/22/2023]
Abstract
Determination of penicillin residues in different industrial effluents including wastewater and air samples is important to prevent exposure to residual amounts of penicillin and the development of antibiotic resistance. A green high performance liquid chromatography (HPLC) method coupled with diode array detection has been developed and validated for multiplex determination of nine penicillin antibiotics in the industrial air dust and wastewater environmental samples of penicillin facility in addition to the monitoring of facility surface cleaning. Separation was performed on C18 column with gradient elution of methanol and phosphate buffer (pH 4) at a flow rate of 1.5 mL min-1 and ultra violet (UV) detection at 220 nm. Low limits of detection were achieved (0.1-0.3 μg mL-1) indicating good sensitivity of the proposed. The method was applied for ensuring the efficiency of cleaning validation after worst-case selection. Recovery studies of the studied penicillins from fortified stainless steel and polycarbonate surfaces and swabs were between 91.91 and 100.22% with relative standard deviation 0.11-1.79%. The presence of any of the studied penicillins in wastewater samples from penicillin plant drainage was checked. Also, total air dust concentration (mg m-3) and % of penicillin active material residues in air dust were calculated from the area of the exposed group in suspension, tablet and vial production lines. The proposed method can be recommended for routine analysis of air and wastewater environmental samples for the detection of penicillin antibiotics at low levels as well as monitoring of facility surface cleaning with high accuracy and precision.
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Affiliation(s)
- Eman I El-Kimary
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Alexandria University, El-Messalah, Alexandria 21521, Egypt
| | - Mohammed A Korany
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Alexandria University, El-Messalah, Alexandria 21521, Egypt
| | - Ahmed E Issa
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Alexandria University, El-Messalah, Alexandria 21521, Egypt
| | - Mohamed G Basuny
- Pharco Pharmaceutical Industrial Company, Quality Control Department, Alexandria 23511, Egypt
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Kayali Z, Obaydo RH, Alhaj Sakur A. Spider diagram and sustainability evaluation of UV-methods strategy for quantification of aspirin and sildenafil citrate in the presence of salicylic acid in their bulk and formulation. Heliyon 2023; 9:e15260. [PMID: 37123917 PMCID: PMC10130774 DOI: 10.1016/j.heliyon.2023.e15260] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/30/2023] [Accepted: 03/31/2023] [Indexed: 04/09/2023] Open
Abstract
The cutting-edge combination of aspirin (ASA) and sildenafil citrate (SIC) has been presented as a suggested dosage form for the treatment of thin endometrium and erectile dysfunction, particularly in patients with cardiovascular diseases. However, ASA is highly sensitive to degradation into its major deterioration product, known as salicylic acid (SA). Consequently, it is eminently essential to evolve approaches for the synchronous quantification of ASA and SIC in the presence of SA. The main objective of this work is to develop three approaches for the synchronous quantification of ASA and SIC in the presence of SA in their commixtures and suggested formulations without any prior separation. Three green UV-methods were employed for the synchronous quantification, namely: Dual Wavelength in Ratio Spectra (DW-RS), Advanced Amplitude Centering (AAC), and Double Divisor of Ratio Difference Derivative (DDRD-D1). In DW-RS and AAC two-wavelength manipulation was used for resolution, while in DDRD-D1 only an appropriate wavelength for the synchronous quantification of the triplex commixture was used. All approaches can be able to resolve the highly interfering spectrum of the three components presented in the triplex commixture. Good linearity was inspected in the range of 20.0-100.0, 5.0-50.0, and 4.0-60.0 μg/mL for the ASA, SIC, and SA, respectively. All developed approaches have been advocated in accordance with ICH guidelines. All results from these approaches are presented and statistically reconciled with the proclaimed HPLC method, with no considerable differences. Furthermore, the approaches' eco-friendliness was predestined by Analytical Greenness (AGREE), and the complex GAPI. Moreover, the sustainability of the used solvent was evaluated by Green Solvents Selecting Tool (GSST); in addition, the greenness of the solvent was evaluated by Greenness Index tool with a spider diagram. The suggested UV-methods may be employed for routine quality control studies of the suggested formulations ASA & SIC since they were considered sustainable, economical, and effective.
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Abdelazim AH, Abdel-Fattah A, Osman AOE, Abdel-Kareem RF, Ramzy S. Spectrophotometric Quantitative Analysis of Aspirin and Vonoprazan Fumarate in Recently Approved Fixed-Dose Combination Tablets Using Ratio Spectra Manipulating Tools. J AOAC Int 2023; 106:490-495. [PMID: 36264114 DOI: 10.1093/jaoacint/qsac128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 09/11/2022] [Accepted: 10/13/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Low-dose aspirin (ASP) is prescribed to millions of people around the world as a secondary preventative strategy for the majority of significant cardiovascular events; however, it carries a substantial risk of gastric ulcer and bleeding. Cabpirin® tablets, which include low-dose ASP and vonoprazan fumarate (VON), are approved in Japan for the treatment of acid-related diseases in patients who require a low dose of ASP but are at risk of ASP-associated gastric ulcers. OBJECTIVE This paper describes the first published quantitative analytical approaches for the determination of ASP and VON. METHOD The normal ultraviolet absorption spectra of ASP and vonoprazan overlap significantly. The ratio spectra of the studied drugs were created and manipulated by ratio difference (RD) and first derivative of ratio spectra approaches. In the RD approach, the differences in the amplitude values between 229 and 283 nm enabled the quantitative analysis of ASP, and the differences in the amplitude values between 255 and 212 nm enabled the quantitative analysis of vonoprazan. In the first derivative of the ratio spectra approach, the created ratio spectra of each drug were transformed to the first-order derivative. ASP could be determined selectively at 237.40 nm without interference from vonoprazan. Moreover, vonoprazan could be determined selectively at 244 nm without interference from ASP. RESULTS The applied approaches were validated according to the ICH guideline, with good results. Linear correlations were obtained for ASP and vonoprazan over concentration ranges of 2-25 and 1-10 µg/mL, respectively. CONCLUSIONS The described methods were optimized, validated, and applied for determination of the studied drugs in the synthetic mixtures and in pharmaceutical tablets without interferences. HIGHLIGHTS Two spectrophotometric ratio spectra manipulating approaches were developed for the determination of the ASP and vonoprazan in their pharmaceutical combination tablets.
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Affiliation(s)
- Ahmed H Abdelazim
- Al-Azhar University, Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, 11751 Nasr City, Cairo, Egypt
| | - Ashraf Abdel-Fattah
- Al-Azhar University, Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, 11751 Nasr City, Cairo, Egypt
| | - Ayman O E Osman
- Al-Azhar University, Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, 11751 Nasr City, Cairo, Egypt
| | - Rady F Abdel-Kareem
- Al-Azhar University, Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, 11751 Nasr City, Cairo, Egypt
| | - Sherif Ramzy
- Al-Azhar University, Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, 11751 Nasr City, Cairo, Egypt
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Elkady EF, Fouad MA, Mozayad AN. Application of Box-Behnken experimental design and response surface methodology for selecting the optimum RP-HPLC conditions for the simultaneous determination of methocarbamol, indomethacin and betamethasone in their pharmaceutical dosage form. BMC Chem 2022; 16:114. [PMID: 36510282 PMCID: PMC9743662 DOI: 10.1186/s13065-022-00908-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 11/29/2022] [Indexed: 12/14/2022] Open
Abstract
An isocratic RP-HPLC method has been developed for the separation and determination of methocarbamol (MTL), indomethacin (IND), and betamethasone (BET) in combined dosage form using an Inertsil ODS-3v C18 (250 × 4.6 mm, 5 μm) column with UV- detection at 235 nm. Experimental design using Box-Behnken design (BBD) was applied to study the response surface during method optimization and to achieve a good separation with a minimum number of experimental runs. The three independent parameters were pH of buffer, % of acetonitrile and flow rate of the mobile phase while the peak resolution of IND from MTL and the peak resolution of BET from IND (R2) were taken as responses to obtain mathematical models. The composite desirability was employed to optimize a set of responses overall (peak resolutions). The predicted optimum assay conditions include a mobile phase composition of acetonitrile and phosphate buffer (pH 5.95) in a ratio of 79:21, v/v, pumped at a flow rate of 1.4 mL min-1. With this ideal condition, the optimized method was able to achieve baseline separation of the three drugs with good resolution and a total run time of less than 7 min. The linearity of MTL, IND, and BET was determined in the concentration ranges of 5-600 µg mL- 1, 5-300 µg mL- 1, and 5-300 µg mL- 1 and the regression coefficients were 0.9994, 0.9998, and 0.9998, respectively. The average percent recoveries for the accuracy were determined to be 100.41 ± 0.60%, 100.86 ± 0.86%, and 100.99 ± 0.65% for MTL, IND, and BET, respectively. The R.S.D.% of the intra-day precision was found to be less than 1%, while the R.S.D.% of the inter-day precision was found to be less than 2%. The RP-HPLC method was fully validated with regard to linearity, accuracy, precision, specificity, and robustness as per ICH recommendations. The proposed method has various applications in quality control and routine analysis of the investigated drugs in their pharmaceutical dosage forms and laboratory-prepared mixtures with the goal of reducing laboratory waste, analysis time, and effort.
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Affiliation(s)
- Ehab F. Elkady
- grid.7776.10000 0004 0639 9286Pharmaceutical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562 Egypt
| | - Marwa A. Fouad
- grid.7776.10000 0004 0639 9286Pharmaceutical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562 Egypt ,grid.517528.c0000 0004 6020 2309Pharmaceutical Chemistry Department, School of Pharmacy, NewGiza University, Newgiza, km 22 Cairo– Alexandria Desert Road, Cairo, Egypt
| | - Ayoub N. Mozayad
- grid.412413.10000 0001 2299 4112Pharmaceutical Chemistry Department, Faculty of Pharmacy, Sana’a University, Sana’a, Yemen
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El-Salamouni NS, Gowayed MA, Younis SE, Abdel-Bary A, Kamel MA, Labib GS. Pentoxifylline/Valsartan co-delivery in liposomal gel alters the inflammatory HMGB-1/ TLR pathway and promotes faster healing in burn wounds: A promising repurposed approach. Int J Pharm 2022; 625:122129. [PMID: 36007851 DOI: 10.1016/j.ijpharm.2022.122129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 08/06/2022] [Accepted: 08/17/2022] [Indexed: 10/15/2022]
Abstract
Burn wounds are one of the most severe complex forms of trauma. Hence, new treatment strategies that facilitate the healing process; reduce the severity and the healing time is the main concern of the health care systems. In this work, pentoxifylline-valsartan, (PTX- VAL), loaded liposomes integrated into gel were designed for the first time as a novel co-delivery carrier for the treatment of burn wounds. The objective of this work was to investigate the ability of the nano-based liposomal system to co-entrap two repurposed drugs; hydrophilic pentoxifylline and lipophilic valsartan for topical treatment of burn wounds. The impact of increasing the phospholipid amount to enhance the co-entrapment of PTX and VAL was investigated and in-vitro evaluation of the prepared formulations was conducted to choose the optimum composition with the highest entrapment of both drugs adopting a simple, reliable derivative spectrophotometric method. Structure elucidation was also performed using a transmission electron microscope. In addition, A simple selected derivative spectrophotometric method was developed for the assay of PTX-VAL novel combination. The proven selectivity, precision and accuracy assured the reliability of this analytical method. Being economic and fast makes routine application of the developed analytical method is recommended in pharmaceutical industry. The selected liposomal formulation integrated into gel matrix (PTX-VAL-LG) showed; nanometric size, acceptable entrapment efficiency of both PTX and VAL as well as sustained release profiles and thus, enhanced action.
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Affiliation(s)
- Noha S El-Salamouni
- Department of Pharmaceutics & Pharmaceutical Technology, Faculty of Pharmacy, Pharos University in Alexandria, Alexandria, Egypt.
| | - Mennatallah A Gowayed
- Department of Pharmacology & Therapeutics, Faculty of Pharmacy, Pharos University in Alexandria, Alexandria, Egypt.
| | - Sameh E Younis
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Pharos University in Alexandria, Alexandria, Egypt.
| | - Ahmed Abdel-Bary
- Department of Dermatology, Venereology, Andrology and Dermatopathology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - Maher A Kamel
- Department of Biochemistry, Medical Research Institute, Alexandria University, Egypt.
| | - Gihan S Labib
- Department of Pharmaceutics & Pharmaceutical Technology, Faculty of Pharmacy, Pharos University in Alexandria, Alexandria, Egypt.
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Cheng S, Xu X, Kong X, Jiang Y, Mo L, Li M, Jin Y, Han Y, Li XL, Jin T, Min JZ. Monitoring of salicylic acid content in human saliva and its relationship with plasma concentrations. J Pharm Biomed Anal 2022; 219:114961. [PMID: 35907319 DOI: 10.1016/j.jpba.2022.114961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/18/2022] [Accepted: 07/21/2022] [Indexed: 11/25/2022]
Abstract
Aspirin is a widely used anti-inflammatory drug. It is reported that a relationship may exist between salicylic acid content in plasma and saliva after taking aspirin. This study established a rapid, convenient, and safe method to assess salicylic acid concentration in human saliva. A novel HPLC-ultraviolet detector was used to measure salicylic acid concentrations in human saliva and plasma. A C18 reversed-phase column with an aqueous solution of 0.1% trifluoroacetic acid (TFA)-acetonitrile mobile phase was used, and drug peaks were recorded at 303 nm. Salicylic acid was completely separated in saliva and plasma. Excellent linearity and correlation (r2 ≥ 0.9999) was observed between 0.1 and 2.0 μg/mL. The detection limit (S/N = 3) was 33 ng/mL, and intra- and inter-day recoveries were 103.5-113.3% and 101.1-109.5%, respectively. Salicylic acid was measured within nine hours after administration of acetylsalicylic acid tablets. A positive correlation between salicylic acid content in saliva and plasma was found (r = 0.867, p < 0.001). The proposed method was used successfully to measure salicylic acid concentration in human saliva. Meanwhile, we explored the relationship between salicylic acid levels in plasma and saliva. Saliva might replace blood for monitoring aspirin treatment. In addition, the research provides a reference for application to saliva samples.
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Affiliation(s)
- Shengyu Cheng
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, Yanji 133002, Jilin Province, China
| | - Xianglin Xu
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, Yanji 133002, Jilin Province, China
| | - Xinxin Kong
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, Yanji 133002, Jilin Province, China
| | - Yudi Jiang
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, Yanji 133002, Jilin Province, China
| | - Luxuan Mo
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, Yanji 133002, Jilin Province, China
| | - Mingxia Li
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, Yanji 133002, Jilin Province, China
| | - Yueying Jin
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, Yanji 133002, Jilin Province, China
| | - Yu Han
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, Yanji 133002, Jilin Province, China
| | - Xi-Ling Li
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, Yanji 133002, Jilin Province, China
| | - Toufeng Jin
- Department of General Surgery Yanbian University Hospital, Yanji 133002, Jilin Province, China.
| | - Jun Zhe Min
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, Yanji 133002, Jilin Province, China.
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Vahidifar M, Es'haghi Z, Oghaz NM, Mohammadi AA, Kazemi MS. Multi-template molecularly imprinted polymer hybrid nanoparticles for selective analysis of nonsteroidal anti-inflammatory drugs and analgesics in biological and pharmaceutical samples. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:47416-47435. [PMID: 35182341 DOI: 10.1007/s11356-021-18308-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
The multi-template molecularly imprinted polymers reinforced with hybrid oxide nanoparticles were developed for the selective separation and determination of the trace level of naproxen (NPX), methocarbamol (MTH), and omeprazole (OMZ) simultaneously from biological and pharmaceutical samples. The polymers were constructed by magnetic core@shell molecularly imprinted polymer nanocomposite (Fe3O4/ZnO/CuO/MWCNT@MIP). An electrochemical sensor has been fabricated for this purpose. Fe3O4/ZnO/CuO/MWCNT nanocomposite was introduced to improve the electron transport capability and increase the sensor surface area, as well as enhance the electronic conductivity. The triple-template MIP-coated layer provides simultaneous selective identification of three analytes by using [Fe (CN)6]3-/4-as the redox probe. Electrochemical behavior of MTH, NPX, and OMZ on the modified electrode (Fe3O4/ZnO/CuO/MWCNT@MIP) by various techniques such as cyclic voltammetry, differential pulse voltammetry, and chronoamperometry was examined. The morphology of the modified and unmodified carbon paste electrodes was performed by scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD). The average crystal size for fabricated nanoparticles obtained by calculating the X-ray diffraction technique was 17 nm in the Scherer method. The particle size which was determined by SEM was 48 nm. Some electrochemical parameters such as the diffusion coefficient and electron transfer coefficient were determined. The effect of many variables such as the pH and scan rate was also investigated. Under optimal conditions, the sensor is designed in the linear range 5.0 nM-100 μM and 5.0 nM-100 μM and 1.0 nM-130 μM with a detection limit of 1.5 nM, 1.0 nM, and 0.7 nM for measurement OMZ, NPX, and MTH, respectively. The relative standard deviation (RSD) of the five measurements was 1.21%, 2.23%, and 2.56% for NPX, MTH, and OMZ. Finally, the designed sensor was successfully used for simultaneous detection of target analytes in the real samples; tablets, water samples, and biological samples.
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Affiliation(s)
- Mohammad Vahidifar
- Department of Chemistry, Payame Noor University (PNU), 19395-3697, Tehran, Islamic Republic of Iran
| | - Zarrin Es'haghi
- Department of Chemistry, Payame Noor University (PNU), 19395-3697, Tehran, Islamic Republic of Iran.
| | | | - Ali Akbar Mohammadi
- Department of Environmental Health Engineering, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Malihe Samadi Kazemi
- Department of Chemistry, Faculty of Sciences, Bojnourd Branch. Islamic Azad University, Bojnourd, Iran
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Encarnação T, Aguiar A, Palito C, Pais AACC, Campos MG, Sobral AJFN, Burrows HD. Development and validation of a RP-HPLC method for the simultaneous analysis of paracetamol, ibuprofen, olanzapine, and simvastatin during microalgae bioremediation. MethodsX 2020; 7:101083. [PMID: 33102154 PMCID: PMC7569217 DOI: 10.1016/j.mex.2020.101083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 09/24/2020] [Indexed: 02/06/2023] Open
Abstract
A rapid reverse phase high-performance liquid chromatography (RP-HPLC) method was developed and validated for the simultaneous quantification of paracetamol, ibuprofen, olanzapine, simvastatin and simvastatin acid in the context of microalgae bioremediation. The method was validated according to the guidelines of the US Food and Drug Administration (FDA), the International Conference on Harmonization (ICH), and Eurachem with respect to system suitability, linearity, accuracy, precision, recovery, limits of detection and quantification, ruggedness, selectivity and specificity. The estimated limits of detection and quantification were, respectively, 0.03 and 0.10 µg mL-1 for paracetamol, 0.03 and 0.09 µg mL-1 for ibuprofen, 0.04 and 0.13 µg mL-1 for olanzapine, 0.27 and 0.83 µg mL-1 for simvastantin, and 0.05 and 0.14 µg mL-1 for simvastantin acid. The inter-day and intra-day precision results were within the acceptance limit of relative standard deviation (%RSD) of less than 2, and the percentage recovery was found to be within the required limits of 80-110%. The developed method is rapid, linear, precise, robust and accurate, and has been successfully applied to the determination of the above common pharmaceutical products during microalgae bioremediation.
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Affiliation(s)
- Telma Encarnação
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - António Aguiar
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Cátia Palito
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Alberto A C C Pais
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Maria G Campos
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Abílio J F N Sobral
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Hugh D Burrows
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
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Taheri N, Alizadeh N. Vertically grown nanosheets conductive polypyrrole as a sorbent for nanomolar detection of salicylic acid. J Pharm Biomed Anal 2020; 188:113365. [DOI: 10.1016/j.jpba.2020.113365] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 04/25/2020] [Accepted: 05/11/2020] [Indexed: 11/25/2022]
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