{"title":"水样中痕量六价铬离子的灵敏分光光度测定:基于合成/表征的特定任务离子液体的简单快速均质溶剂/原位溶剂形成微萃取法","authors":"Mehdi Hosseini, Seyyed Mehdi Khoshfetrat","doi":"10.1007/s10953-024-01384-6","DOIUrl":null,"url":null,"abstract":"<div><p>The preconcentration of uranium VI (U(VI)) at trace levels in some real water and wastewater samples and its determination by spectrophotometry using a homogeneous solvent-based microextraction method, specifically in-situ solvent formation microextraction, were investigated. This microextraction method uses a unique task-specific ionic liquid (IL) as the specific complexing agent and/or extracting phase. A pyrrolidinium-based IL modified with (E)-5-(bromomethyl)-2-(pyridin-2-yldiazenyl) phenol as a task-specific IL (E)-1-(3-hydroxy-4-(pyridin-2-yldiazenyl) benzyl)-1-methylpyrrolidinium bromide (TSIL/Br) was successfully synthesized and characterized by <sup>1</sup>HNMR and FTIR analyses. TSIL/Br chelated with U(VI) ions in the aqueous phase to form a hydrophilic [U(VI)-TSIL/Br<sub>2</sub>] complex with high efficiency. It was then converted to a hydrophobic [U(VI)-TSIL/(NTf<sub>2</sub>)<sub>2</sub>] complex through a counter-ion agent, such as bis(trifluoromethanesulfonyl)imide (<span>\\(\\text{NTF}_2^-\\)</span>) for separation from the aqueous solution phase. This process eliminates the need for a separate complexing agent, because TSIL/Br acts simultaneously as both a complexing agent and an extracting solvent. In brief, the conditions of the microextraction process must be optimized for the analysis of real water samples. Under the optimum conditions, a preconcentration factor, detection limit, quantification limit, linear dynamic range, and relative standard deviation of 218, 1.62 ng·mL<sup>−1</sup>, 5.42 ng·mL<sup>−1</sup>, 20.0–450.0 ng·mL<sup>−1</sup>, and 2.47% (<i>n</i> = 10, 20 ng·mL<sup>−1</sup>) were obtained, respectively. Finally, to assess the method’s ability, it was successfully employed to determine the U(VI) ion content in various real water, wastewater and reference material samples.</p></div>","PeriodicalId":666,"journal":{"name":"Journal of Solution Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Sensitive Spectrophotometric Determination of U(VI) Ion at Trace Level in Water Samples: A Simple and Rapid Homogenous Solvent-Based/In-Situ Solvent Formation Microextraction Based on Synthesized/Characterized Task-Specific Ionic Liquid\",\"authors\":\"Mehdi Hosseini, Seyyed Mehdi Khoshfetrat\",\"doi\":\"10.1007/s10953-024-01384-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The preconcentration of uranium VI (U(VI)) at trace levels in some real water and wastewater samples and its determination by spectrophotometry using a homogeneous solvent-based microextraction method, specifically in-situ solvent formation microextraction, were investigated. This microextraction method uses a unique task-specific ionic liquid (IL) as the specific complexing agent and/or extracting phase. A pyrrolidinium-based IL modified with (E)-5-(bromomethyl)-2-(pyridin-2-yldiazenyl) phenol as a task-specific IL (E)-1-(3-hydroxy-4-(pyridin-2-yldiazenyl) benzyl)-1-methylpyrrolidinium bromide (TSIL/Br) was successfully synthesized and characterized by <sup>1</sup>HNMR and FTIR analyses. TSIL/Br chelated with U(VI) ions in the aqueous phase to form a hydrophilic [U(VI)-TSIL/Br<sub>2</sub>] complex with high efficiency. It was then converted to a hydrophobic [U(VI)-TSIL/(NTf<sub>2</sub>)<sub>2</sub>] complex through a counter-ion agent, such as bis(trifluoromethanesulfonyl)imide (<span>\\\\(\\\\text{NTF}_2^-\\\\)</span>) for separation from the aqueous solution phase. This process eliminates the need for a separate complexing agent, because TSIL/Br acts simultaneously as both a complexing agent and an extracting solvent. In brief, the conditions of the microextraction process must be optimized for the analysis of real water samples. Under the optimum conditions, a preconcentration factor, detection limit, quantification limit, linear dynamic range, and relative standard deviation of 218, 1.62 ng·mL<sup>−1</sup>, 5.42 ng·mL<sup>−1</sup>, 20.0–450.0 ng·mL<sup>−1</sup>, and 2.47% (<i>n</i> = 10, 20 ng·mL<sup>−1</sup>) were obtained, respectively. Finally, to assess the method’s ability, it was successfully employed to determine the U(VI) ion content in various real water, wastewater and reference material samples.</p></div>\",\"PeriodicalId\":666,\"journal\":{\"name\":\"Journal of Solution Chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2024-06-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Solution Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10953-024-01384-6\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Solution Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10953-024-01384-6","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Sensitive Spectrophotometric Determination of U(VI) Ion at Trace Level in Water Samples: A Simple and Rapid Homogenous Solvent-Based/In-Situ Solvent Formation Microextraction Based on Synthesized/Characterized Task-Specific Ionic Liquid
The preconcentration of uranium VI (U(VI)) at trace levels in some real water and wastewater samples and its determination by spectrophotometry using a homogeneous solvent-based microextraction method, specifically in-situ solvent formation microextraction, were investigated. This microextraction method uses a unique task-specific ionic liquid (IL) as the specific complexing agent and/or extracting phase. A pyrrolidinium-based IL modified with (E)-5-(bromomethyl)-2-(pyridin-2-yldiazenyl) phenol as a task-specific IL (E)-1-(3-hydroxy-4-(pyridin-2-yldiazenyl) benzyl)-1-methylpyrrolidinium bromide (TSIL/Br) was successfully synthesized and characterized by 1HNMR and FTIR analyses. TSIL/Br chelated with U(VI) ions in the aqueous phase to form a hydrophilic [U(VI)-TSIL/Br2] complex with high efficiency. It was then converted to a hydrophobic [U(VI)-TSIL/(NTf2)2] complex through a counter-ion agent, such as bis(trifluoromethanesulfonyl)imide (\(\text{NTF}_2^-\)) for separation from the aqueous solution phase. This process eliminates the need for a separate complexing agent, because TSIL/Br acts simultaneously as both a complexing agent and an extracting solvent. In brief, the conditions of the microextraction process must be optimized for the analysis of real water samples. Under the optimum conditions, a preconcentration factor, detection limit, quantification limit, linear dynamic range, and relative standard deviation of 218, 1.62 ng·mL−1, 5.42 ng·mL−1, 20.0–450.0 ng·mL−1, and 2.47% (n = 10, 20 ng·mL−1) were obtained, respectively. Finally, to assess the method’s ability, it was successfully employed to determine the U(VI) ion content in various real water, wastewater and reference material samples.
期刊介绍:
Journal of Solution Chemistry offers a forum for research on the physical chemistry of liquid solutions in such fields as physical chemistry, chemical physics, molecular biology, statistical mechanics, biochemistry, and biophysics. The emphasis is on papers in which the solvent plays a dominant rather than incidental role. Featured topics include experimental investigations of the dielectric, spectroscopic, thermodynamic, transport, or relaxation properties of both electrolytes and nonelectrolytes in liquid solutions.