使用疏水性天然深共晶溶剂和智能手机检测表面活性剂

IF 3.5 Q2 CHEMISTRY, ANALYTICAL
Vagner Bezerra dos Santos, Lucas B. Ayres, Helayne Santos de Sousa, Carlos D. Garcia and Willian Toito Suarez
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引用次数: 0

摘要

我们报告了一种检测环境水样中表面活性剂的绿色方法的优点。该方法基于使用疏水性天然深共晶溶剂(NADES)来提取表面活性剂与亚甲基蓝形成的复合物。然后使用智能手机测量有机相中的颜色强度,从而确定表面活性剂的浓度。在优化条件下,将等分的 100 µL NADES 与 15 mL 水混合,然后静置 5 分钟(使两相分离)。该方法可定量检测十二烷基硫酸钠(SDS),作为烷基表面活性剂的替代物,检测范围为 0.010 mg L-1 至 0.600 mg L-1,检测限为 2.0 µg.L-1。除了可以简单地替代传统方法(需要氯仿和分光光度计)外,该方法还具有废物产生少、耗电量低、分析时间快等优点,并且与现场分析通常使用的塑料用品(如比色皿、移液管、吸头等)完全兼容。通过测量各种地表水样本,证明了该方法的适用性,并计算出该方法的总体绿色得分率为 96%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Detection of surfactants using a hydrophobic natural deep eutectic solvent and smartphone†

Detection of surfactants using a hydrophobic natural deep eutectic solvent and smartphone†

We report on the advantages of a green method to detect surfactants in environmental water samples. The approach is based on the use of a hydrophobic natural deep eutectic solvent (NADES) to extract the complexes formed by the surfactants and methylene blue. The concentration of the surfactant is then determined by measuring the color intensity in the organic phase using a smartphone. Under optimized conditions, an aliquot of 3 mL of the NADES was mixed with 15 mL of water, and then allowed to settle (to enable the separation of the two phases) for 5 min. The procedure allowed quantification of sodium dodecyl sulfate (SDS), as a proxy for alkyl surfactants in the range from 0.010 mg L−1 to 0.600 mg L−1, with a detection limit of 2.0 μg L−1. Besides being a simple alternative to the traditional method (which requires chloroform and a spectrophotometer), the proposed approach offers low waste generation, low power-consumption, and fast analysis time, and is fully compatible with the plastic supplies (e.g. cuvettes, pipettes, tips, etc.) typically used for on-site analysis. The applicability of the approach was demonstrated by measuring various surface water samples and the overall green score of the method was calculated to be 96%.

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CiteScore
2.30
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