Highly selective solid phase extraction of clonazepam from water using a urea modified MOF prior to HPLC analysis
Abstract The presence of pharmaceutical pollutants, such as clonazepam (CZP), in aquatic environments poses significant risks to ecosystems and human health. This study introduces a novel solid-phase extraction (SPE) method utilizing a urea-modified metal-organic framework (MIL-101(Fe)-Urea) for the...
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Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-07127-x |
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| author | Marzieh Sharifi-Rad Asma Khoobi Mostafa Khajeh Massoud Kaykhaii Ali Reza Oveisi |
| author_facet | Marzieh Sharifi-Rad Asma Khoobi Mostafa Khajeh Massoud Kaykhaii Ali Reza Oveisi |
| author_sort | Marzieh Sharifi-Rad |
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| description | Abstract The presence of pharmaceutical pollutants, such as clonazepam (CZP), in aquatic environments poses significant risks to ecosystems and human health. This study introduces a novel solid-phase extraction (SPE) method utilizing a urea-modified metal-organic framework (MIL-101(Fe)-Urea) for the selective preconcentration and quantification of CZP in environmental water samples, then analyzed by high performance liquid chromatography analysis. The MIL-101(Fe)-Urea adsorbent was synthesized through a post-synthetic modification approach and characterized using FTIR, PXRD, SEM, BET, and EDX techniques. Key extraction parameters, including pH, adsorbent dosage, extraction/desorption times, and sample volume, were optimized to achieve maximum adsorption efficiency. Under optimal conditions, the method demonstrated excellent linearity (R2 = 0.997) within a concentration range of 20–1500 µg L−1, with a low detection limit (LOD = 0.030 µg L−1), high recovery rates (94.9–99.0%), and a relative standard deviation of 1.4%. The developed method was successfully applied to real environmental water samples, confirming its practicality for environmental monitoring. This study highlights the potential of MIL-101(Fe)-Urea as an advanced adsorbent for the analysis of pharmaceutical contaminants, contributing to the development of efficient and environmentally friendly analytical techniques for water quality assessment. |
| format | Article |
| id | doaj-art-3148579a694a485b80f3ea9c1d972d39 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-3148579a694a485b80f3ea9c1d972d392025-08-20T04:03:03ZengNature PortfolioScientific Reports2045-23222025-07-0115111810.1038/s41598-025-07127-xHighly selective solid phase extraction of clonazepam from water using a urea modified MOF prior to HPLC analysisMarzieh Sharifi-Rad0Asma Khoobi1Mostafa Khajeh2Massoud Kaykhaii3Ali Reza Oveisi4Department of Chemistry, Faculty of Sciences, University of Sistan and BaluchestanDepartment of Chemistry, Faculty of Sciences, University of Sistan and BaluchestanDepartment of Chemistry, University of ZabolDepartment of Analytical Chemistry, Faculty of Natural Sciences, Comenius University in BratislavaDepartment of Organic Chemistry, Faculty of Chemistry, Lorestan UniversityAbstract The presence of pharmaceutical pollutants, such as clonazepam (CZP), in aquatic environments poses significant risks to ecosystems and human health. This study introduces a novel solid-phase extraction (SPE) method utilizing a urea-modified metal-organic framework (MIL-101(Fe)-Urea) for the selective preconcentration and quantification of CZP in environmental water samples, then analyzed by high performance liquid chromatography analysis. The MIL-101(Fe)-Urea adsorbent was synthesized through a post-synthetic modification approach and characterized using FTIR, PXRD, SEM, BET, and EDX techniques. Key extraction parameters, including pH, adsorbent dosage, extraction/desorption times, and sample volume, were optimized to achieve maximum adsorption efficiency. Under optimal conditions, the method demonstrated excellent linearity (R2 = 0.997) within a concentration range of 20–1500 µg L−1, with a low detection limit (LOD = 0.030 µg L−1), high recovery rates (94.9–99.0%), and a relative standard deviation of 1.4%. The developed method was successfully applied to real environmental water samples, confirming its practicality for environmental monitoring. This study highlights the potential of MIL-101(Fe)-Urea as an advanced adsorbent for the analysis of pharmaceutical contaminants, contributing to the development of efficient and environmentally friendly analytical techniques for water quality assessment.https://doi.org/10.1038/s41598-025-07127-xMetal-organic frameworkSolid-phase extractionDrugEnvironmental monitoringPost-synthetic modificationBenzodiazepines |
| spellingShingle | Marzieh Sharifi-Rad Asma Khoobi Mostafa Khajeh Massoud Kaykhaii Ali Reza Oveisi Highly selective solid phase extraction of clonazepam from water using a urea modified MOF prior to HPLC analysis Scientific Reports Metal-organic framework Solid-phase extraction Drug Environmental monitoring Post-synthetic modification Benzodiazepines |
| title | Highly selective solid phase extraction of clonazepam from water using a urea modified MOF prior to HPLC analysis |
| title_full | Highly selective solid phase extraction of clonazepam from water using a urea modified MOF prior to HPLC analysis |
| title_fullStr | Highly selective solid phase extraction of clonazepam from water using a urea modified MOF prior to HPLC analysis |
| title_full_unstemmed | Highly selective solid phase extraction of clonazepam from water using a urea modified MOF prior to HPLC analysis |
| title_short | Highly selective solid phase extraction of clonazepam from water using a urea modified MOF prior to HPLC analysis |
| title_sort | highly selective solid phase extraction of clonazepam from water using a urea modified mof prior to hplc analysis |
| topic | Metal-organic framework Solid-phase extraction Drug Environmental monitoring Post-synthetic modification Benzodiazepines |
| url | https://doi.org/10.1038/s41598-025-07127-x |
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