Mutić Sanja, Anojčić Jasmina, Vraneš Milan, Panić Jovana, Papović Snežana
Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia.
Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia.
Talanta. 2024 Jan 1;266(Pt 2):125103. doi: 10.1016/j.talanta.2023.125103. Epub 2023 Aug 22.
The rapid and sensitive voltammetric determination of organic UV filters benzophenone-3 (BP-3) and avobenzone (AVO) was performed by an ionic liquid carbon paste electrode (IL-CPE). Namely, the synthesized pyridinium-based ILs, 1-butyl-3-methylpyridinium chloride ([N-C-3CPy]Cl) and 1-ethoxyethyl-3-methylpyridinium chloride ([N-COC-3CPy]Cl) were compared as bulk CPE modifiers for BP-3 determination. [N-C-3CPy]Cl-CPE showed more favorable interactions with the target analyte, and it was tested for AVO determination, too. Cyclic voltammetric (CV) studies suggested that the irreversible electrode reaction is adsorption controlled in the case of both UV filters. Also, the square-wave adsorptive stripping voltammetric (SW-AdSV) method was optimized for quantifying selected UV filters. In the model solutions, the linear calibration curve was obtained by the SW-AdSV method in the concentration range from 0.05 to 0.89 μg mL at pH 3.0 for BP-3 (E = -0.7 V, t = 100 s), and from 0.05 to 1.77 μg mL at pH 11.98 for AVO (E = 0.2 V, t = 100 s). The evaluated limit of detection (LOD) was 0.015 μg mL in both cases, while the relative standard deviation (RSD) was lower than 1.5%. The affordable IL-based voltammetric sensor fulfills the main requirements for application in real samples due to an adequate selectivity towards selected analytes in the presence of interferents usually found in swimming pool water. Therefore, the BP-3 and AVO were quantified in a swimming pool water matrix with good repeatability and recovery. The obtained results demonstrate an excellent potential of the IL-CPEs, especially of the [N-C-3CPy]Cl-CPE, for determining selected UV filters in various real samples.
采用离子液体碳糊电极（IL-CPE）对有机紫外线过滤剂二苯甲酮-3（BP-3）和阿伏苯宗（AVO）进行了快速灵敏的伏安测定。具体而言，比较了合成的吡啶基离子液体1-丁基-3-甲基吡啶氯化物（[N-C-3CPy]Cl）和1-乙氧基乙基-3-甲基吡啶氯化物（[N-COC-3CPy]Cl）作为测定BP-3的本体碳糊电极修饰剂。[N-C-3CPy]Cl-CPE与目标分析物表现出更有利的相互作用，并且也对其进行了AVO测定测试。循环伏安（CV）研究表明，对于这两种紫外线过滤剂，不可逆电极反应均受吸附控制。此外，还对方波吸附溶出伏安法（SW-AdSV）进行了优化，用于定量测定选定的紫外线过滤剂。在模型溶液中，通过SW-AdSV法在pH 3.0时BP-3浓度范围为0.05至0.89μg/mL（E = -0.7 V，t = 100 s），以及在pH 11.98时AVO浓度范围为0.05至1.77μg/mL（E = 0.2 V，t = 100 s）获得线性校准曲线。两种情况下评估的检测限（LOD）均为0.015μg/mL，而相对标准偏差（RSD）低于1.5%。这种经济实惠的基于离子液体的伏安传感器由于对游泳池水中通常存在的干扰物存在下选定分析物具有足够的选择性，满足了在实际样品中应用的主要要求。因此，在游泳池水基质中对BP-3和AVO进行了定量，具有良好的重复性和回收率。所得结果表明IL-CPEs，尤其是[N-C-3CPy]Cl-CPE，在测定各种实际样品中选定的紫外线过滤剂方面具有出色的潜力。
