{"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":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"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\":1,\"journal\":{\"name\":\"Accounts of Chemical Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":16.4000,\"publicationDate\":\"2024-06-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Accounts of Chemical Research\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10953-024-01384-6\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10953-024-01384-6","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","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:
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.