基于分子印迹技术检测纺织品中的辛基酚

Detection of octylphenol in textiles based on molecularly imprinted technology

基于TiO2和聚苯胺分子印迹材料组装了一种新型电化学传感器,用来检测纺织品中的辛基酚。以辛基酚为模板分子,与苯胺和纳米TiO2通过化学反应合成分子印迹复合物。将复合物修饰在丝网印刷电极上,在1.3 V电位下通过恒电位扫描除去模板分子辛基酚,获得大量微腔,实现对目标分子辛基酚的特异性识别。差分脉冲伏安法在0.56 V下的响应可用于辛基酚浓度测定,线性范围为5.0×10^-8~4.0×10^-5 mol/L,检测限为8.36×10^-9 mol/L。该传感器用于纺织品样品检测,加标回收率为90%~100%;用于阳性样品检测,与传统GC-MS法相比,结果一致性高,准确度好。

A new electrochemical sensor based on TiO2 and polyaniline molecularly imprinted material was developed,which was used to detect octylphenol in textiles.Molecularly imprinted composite was synthesized with octylphenol as modelling molecular by chemical reaction of aniline and nano-TiO2.The composites were modified onto screen-printed electrode and octylphenol molecules were excluded by potentiostatic sweeping at the constant potential of 1.3 V.A large number of microcavity were obtained to realize the specific recognition of octylphenol.The modified screen-printed electrode had a strong differential pulse voltammetry response at 0.56 V,which could be used for the detection of octylphenol with a linearly proportional concentration range of 5.0×10^-8~4.0×10^-5 mol/L and a detection limit of 8.36×10^-9 mol/L.The sensor was used for the detection of textile samples,and the standard recovery rate was 90%~100%.Compared with the traditional GC-MS method,the results of the sensor were consistent and accurate.