Rapid detection of contaminants for the purpose of sensitive and quantitative monitoring of environmental hazards is an essential first step in realizing the avoidance of human health risks. In this regard, we present a fast and simple electrochemical method of detecting di-n-butyl phthalate (DBP) from river water samples using a phthalic acid group specific aptamer modified on a gold nanoparticle (AuNP) functionalized graphene oxide nano-platelet (GO) and ionic liquid (IL) nanocomposite. Here, the IL/GO nanocomposite allows an enhanced interaction with phthalate esters, thereby increasing the sensitivity of the sensor surface. The proposed sensor showed a wide linear dynamic range from 0.14 pg mL⁻¹ to 0.35 ng mL⁻¹ and from 0.35 ng mL⁻¹ to 7 ng mL⁻¹ with a detection limit of ≤0.042 pg mL⁻¹, which were evaluated using standard, analytical grade DBP; the limit of quantification was determined using different concentrations of DBP in DI water in comparison with gas chromatography-mass spectroscopy (GC/MS) values. The proposed sensor was used to monitor the DBP concentrations in river water samples collected from various locations across South Korea. The quantitative data from the measurements in comparison with standard GC/MS values were then used to ascertain the human health risk posed by the daily consumption of these river waters.

中文翻译：

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用于韩国河流水域风险评估的 DBP 增塑剂的简单超灵敏电化学检测

快速检测污染物以对环境危害进行灵敏和定量监测是实现避免人类健康风险的重要第一步。在这方面，我们提出了一种快速简单的电化学方法，使用在金纳米颗粒 (AuNP) 官能化氧化石墨烯纳米片 ( GO ) 和离子液体 (IL) 纳米复合材料。在这里，IL/GO 纳米复合材料可以增强与邻苯二甲酸酯的相互作用，从而提高传感器表面的灵敏度。^{所提出的传感器显示出从 0.14 pg mL -1}到 0.35 ng mL ^-1和 0.35 ng mL ^-1的宽线性动态范围至 7 ng mL ^-1，检测限≤0.042 pg mL ^-1，使用标准分析级 DBP 进行评估；使用去离子水中不同浓度的 DBP 与气相色谱-质谱 (GC/MS) 值进行比较来确定定量限。拟议的传感器用于监测从韩国各地收集的河水样本中的 DBP 浓度。然后将测量的定量数据与标准 GC/MS 值进行比较，以确定这些河水的日常消耗对人类健康构成的风险。