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Application Of Thymine-Based Copolymers In The Quantification Of Organic Pollutants In Water By Sensitized Fluorescence
Microchemical Journal ( IF 4.8 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.microc.2020.104625
Julieta Ledesma , Carlos E. Boschetti , Debora M. Martino , Santiago A. Bortolato

Abstract Bio-inspired copolymers based on thymine can interact with certain organic molecules and therefore they can be used as organized media or as optical sensors for analytical determinations. Particularly, the thymine-based copolymers have a high affinity for benzo(a)pyrene (BaP) and pyrene (Pyr), two main persistent organic pollutants in water. In the present work, such interaction is applied for the development of a simple analytical method based on fluorescence enhancement of BaP and Pyr. Since BaP and Pyr fluorescence spectra are strongly overlapped, a multivariate analysis of the data is proposed. The selectivity of the method was achieved through a parallel factors analysis (PARAFAC) of excitation-emission fluorescence matrices. The method performance was tested by simultaneous determination of BaP and Pyr in water samples, without pre-concentration steps or full chromatographic resolution. Studies of recovery for both analytes added to tap and surface waters were done, obtaining results in the order of 87–115%. The analysis was performed in the presence of additional species whose signals overlap with those of the analytes. In all cases, the calculated analytical figures of merit were compared with those obtained by the reference chromatographic method. In addition, a comparison of our method with the reference one is made based on the calculation of their respective eco-scales. The quality of the achieved results indicates that a second-order advantage was reached, while our method represents a greener alternative than the reference chromatographic methodology.

中文翻译:

胸腺嘧啶基共聚物在敏感荧光定量水中有机污染物中的应用

摘要 基于胸腺嘧啶的仿生共聚物可以与某些有机分子相互作用,因此它们可以用作有组织的介质或用作分析测定的光学传感器。特别是,基于胸腺嘧啶的共聚物对苯并(a)芘(BaP)和芘(Pyr)这两种主要的水中持久性有机污染物具有高亲和力。在目前的工作中,这种相互作用被用于开发一种基于 BaP 和 Pyr 荧光增强的简单分析方法。由于 BaP 和 Pyr 荧光光谱强烈重叠,因此建议对数据进行多变量分析。该方法的选择性是通过激发-发射荧光基质的平行因子分析 (PARAFAC) 实现的。通过同时测定水样中的 BaP 和 Pyr 来测试方法性能,无需预浓缩步骤或全色谱分离。对添加到自来水和地表水中的分析物的回收率进行了研究,获得了 87-115% 的结果。分析是在信号与分析物信号重叠的其他物质存在的情况下进行的。在所有情况下,将计算出的分析品质因数与通过参考色谱方法获得的品质因数进行比较。此外,我们的方法与参考方法的比较是基于它们各自生态尺度的计算。所获得结果的质量表明达到了二级优势,而我们的方法代表了比参考色谱方法更环保的替代方案。对添加到自来水和地表水中的分析物的回收率进行了研究,获得了 87-115% 的结果。分析是在信号与分析物信号重叠的其他物质存在的情况下进行的。在所有情况下,计算出的分析品质因数与通过参考色谱方法获得的品质因数进行了比较。此外,我们的方法与参考方法的比较是基于它们各自生态尺度的计算。所获得结果的质量表明达到了二级优势,而我们的方法代表了比参考色谱方法更环保的替代方案。对添加到自来水和地表水中的分析物的回收率进行了研究,获得了 87-115% 的结果。分析是在信号与分析物信号重叠的其他物质存在的情况下进行的。在所有情况下,将计算出的分析品质因数与通过参考色谱方法获得的品质因数进行比较。此外,我们的方法与参考方法的比较是基于它们各自生态尺度的计算。所获得结果的质量表明达到了二级优势,而我们的方法代表了比参考色谱方法更环保的替代方案。分析是在信号与分析物信号重叠的其他物质存在的情况下进行的。在所有情况下,将计算出的分析品质因数与通过参考色谱方法获得的品质因数进行比较。此外,我们的方法与参考方法的比较是基于它们各自生态尺度的计算。所获得结果的质量表明达到了二级优势,而我们的方法代表了比参考色谱方法更环保的替代方案。分析是在信号与分析物信号重叠的其他物质存在的情况下进行的。在所有情况下,将计算出的分析品质因数与通过参考色谱方法获得的品质因数进行比较。此外,我们的方法与参考方法的比较是基于它们各自生态尺度的计算。所获得结果的质量表明达到了二级优势,而我们的方法代表了比参考色谱方法更环保的替代方案。
更新日期:2020-06-01
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