四类两亲性表面活性剂在纳摩尔水平的固相萃取和分光光度法测定：环境应用

IF 5.6 1区化学 Q1 CHEMISTRY, ANALYTICAL

Talanta Pub Date : 2025-07-10 DOI:10.1016/j.talanta.2025.128575

Jim Grisillon , Laurie Michel , Julien de Barry , Barbara Nozière , Julien Dron , Anne Monod , Fabien Robert-Peillard

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引用次数: 0

摘要

表面活性剂是天然的和人为的化合物，通常存在于所有环境隔间中，由于其表面活性特性，可以影响云的形成。本研究基于石墨化炭黑吸附剂固相萃取（SPE）方法和优化的商用离子对试剂和液-液萃取分光光度法，建立了4类两亲性表面活性剂的灵敏、选择性定量新方法。在SPE步骤中使用的顺序洗脱可以分别定量阳离子、非离子、弱阴离子和强阴离子表面活性剂。对分光光度法检测各类表面活性剂的方法进行了优化。建立了一种用甲苯胺蓝制备强阴离子表面活性剂的新方法，并对现有的用亚甲基蓝和硫氰酸铁制备弱阴离子和非离子表面活性剂的方法进行了显著改进。阳离子型、非离子型、弱阴离子型和强阴离子型表面活性剂的检出限分别为0.08、0.076、0.91和0.20 nmol。根据阴离子基团的酸度，提出了一种区分合成表面活性剂（强酸）和生物表面活性剂（弱酸）的分类方法。研究人员还解决了过滤过程中干扰物质和损失的相关问题，并证明了一种新的聚乙烯滤块过滤方法可以提高气溶胶分析中表面活性剂的回收率，所有类型表面活性剂的回收率都在80%以上。该方法适用于实际环境样品，包括海水和淡水样品，气溶胶提取物和云水。表面活性剂在所有样品中都被成功检测到，水样品的总浓度在12.1 nM到495nm之间，气溶胶样品的总浓度在48.4 pmol m - 3到443 pmol m - 3之间。阴离子表面活性剂是所有环境基质的主要成分，但在一些样品中也检测到低浓度的阳离子和非离子表面活性剂。

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Quantification of four classes of amphiphilic surfactants by solid phase extraction and spectrophotometric detection at nanomolar levels: environmental applications

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Quantification of four classes of amphiphilic surfactants by solid phase extraction and spectrophotometric detection at nanomolar levels: environmental applications

Surfactants are natural and anthropogenic compounds commonly found in all environmental compartments and can influence cloud formation due to their surface-active properties. In this work, a new method for the sensitive and selective quantification of 4 different classes of amphiphilic surfactants was developed, based on a new solid-phase extraction (SPE) procedure with a graphitized carbon black sorbent and optimized spectrophotometric methods using commercial ion-pair reagents and liquid-liquid extraction. The sequential elution used in the SPE step enabled separate quantification of cationic, non-ionic, weak anionic and strong anionic surfactants. The spectrophotometric methods of detection of all classes of surfactants were optimized. A new method was developed for strong anionic surfactants using Toluidine blue O. Significant improvements were also made to existing methods for weak anionic and non-ionic surfactants using methylene blue and iron thiocyanate, respectively. Limits of detection of 0.08, 0.076, 0.91 and 0.20 nmol were achieved for cationic, non-ionic, weak anionic and strong anionic surfactants, respectively. A classification according to the acidity of the anionic group was proposed to distinguish synthetic surfactants (strong acids) from biosurfactants (weak acids). Issues related to interfering species, losses during filtration steps were also addressed, and a new filtration method with polyethylene frits was demonstrated to improve surfactants recoveries for aerosol analysis, with recoveries above 80 % for all types of surfactants. The procedure was applied to real environmental samples, including seawater and freshwater samples, aerosols extracts, and cloud water. Surfactants were successfully detected in all samples, with total concentrations between 12.1 nM and 495 nM for aqueous samples and between 48.4 pmol m⁻³ and 443 pmol m⁻³ for aerosol samples. Anionic surfactants were found to be the major constituents in all environmental matrices, but low concentrations of cationic and non-ionic surfactants were also detected in several samples.

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来源期刊

Talanta 化学-分析化学

CiteScore

12.30

自引率

4.90%

发文量

861

审稿时长

29 days

期刊介绍： Talanta provides a forum for the publication of original research papers, short communications, and critical reviews in all branches of pure and applied analytical chemistry. Papers are evaluated based on established guidelines, including the fundamental nature of the study, scientific novelty, substantial improvement or advantage over existing technology or methods, and demonstrated analytical applicability. Original research papers on fundamental studies, and on novel sensor and instrumentation developments, are encouraged. Novel or improved applications in areas such as clinical and biological chemistry, environmental analysis, geochemistry, materials science and engineering, and analytical platforms for omics development are welcome. Analytical performance of methods should be determined, including interference and matrix effects, and methods should be validated by comparison with a standard method, or analysis of a certified reference material. Simple spiking recoveries may not be sufficient. The developed method should especially comprise information on selectivity, sensitivity, detection limits, accuracy, and reliability. However, applying official validation or robustness studies to a routine method or technique does not necessarily constitute novelty. Proper statistical treatment of the data should be provided. Relevant literature should be cited, including related publications by the authors, and authors should discuss how their proposed methodology compares with previously reported methods.