Trace level detection of the azo base of organic dye by surface-enhanced Raman spectroscopy

IF 2.7 3区化学 Q2 CHEMISTRY, ANALYTICAL

Vibrational Spectroscopy Pub Date : 2024-11-01 DOI:10.1016/j.vibspec.2024.103750

Geraldine Jara , Rodrigo Sánchez-González , Camila F. Olguín , Carolina P. Candia , Jorge Pavez , Carlos P. Silva , Elizabeth Imbarack

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Abstract

Water pollution with synthetic pigments is becoming an emerging problem due to the potential damage to aquatic sources and its consequences for flora, fauna, and human health. Currently, techniques to detect the presence of these pollutant pigments in water reach concentrations of µg/L and require pretreatment to detect them. In this work, we present a quick and easy methodology to determine the presence of the basic unit used in textile pigments, 4-(pyridin-4-yldiazenyl)phenyl-amine (4-PDPA), in a synthetic seawater matrix and a real one from the coast of the city of Valparaíso, Chile, using Surface Enhanced Raman Spectroscopy (SERS). Colloidal gold was used as the active surface, spectra corresponding to the pigment profile were recorded without pretreatment of the matrix used, and the pigment was detected at concentrations 0.00198 µg/L up to two orders of magnitude lower than current methods (0.0198 µg/L).

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表面增强拉曼光谱法检测有机染料偶氮碱的痕量水平

由于合成色素对水生资源的潜在损害及其对动植物和人类健康的影响，水污染正在成为一个新出现的问题。目前，检测水中这些污染物色素的技术达到µg/L的浓度，并且需要预处理才能检测到它们。在这项工作中，我们提出了一种快速简便的方法来确定纺织颜料中使用的基本单元4-（吡啶-4-基二氮基）苯基胺（4- pdpa）在合成海水基质和来自智利Valparaíso城市海岸的真实海水基质中的存在，使用表面增强拉曼光谱（SERS）。采用胶体金作为活性表面，在不进行基质预处理的情况下记录了与颜料谱相对应的光谱，在0.00198 µg/L的浓度下检测到的颜料比目前的方法（0.0198 µg/L）低两个数量级。

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来源期刊

Vibrational Spectroscopy 化学-分析化学

CiteScore

4.70

自引率

4.00%

发文量

103

审稿时长

52 days

期刊介绍： Vibrational Spectroscopy provides a vehicle for the publication of original research that focuses on vibrational spectroscopy. This covers infrared, near-infrared and Raman spectroscopies and publishes papers dealing with developments in applications, theory, techniques and instrumentation. The topics covered by the journal include: Sampling techniques, Vibrational spectroscopy coupled with separation techniques, Instrumentation (Fourier transform, conventional and laser based), Data manipulation, Spectra-structure correlation and group frequencies. The application areas covered include: Analytical chemistry, Bio-organic and bio-inorganic chemistry, Organic chemistry, Inorganic chemistry, Catalysis, Environmental science, Industrial chemistry, Materials science, Physical chemistry, Polymer science, Process control, Specialized problem solving.