Akbari Azra, Bahram Morteza, Dadashi Reza, Ehsanimehr Sedigheh
Department of Analytical Chemistry, Faculty of Chemistry, Urmia University, Urmia, Iran.
Department of Organic Chemistry, Faculty of Chemistry, Urmia University, Urmia, Iran.
J Fluoresc. 2024 Oct 23. doi: 10.1007/s10895-024-03996-z.
Benzidine is known as a toxic and highly carcinogenic substance, so its determination is an essential issue. Until now, no effective and stable fluorescent probe based on hydrogel nanocomposite has been reported for the determination of this substance. In this work, for the first time, the synthesis and use of tragacanth-poly (acrylic acid-co-acrylamide-GQD) hydrogel nanocomposite (H-GQD) as a novel, high-stable, and selective fluorescence hydrogel nanocomposite for the identification of benzidine is reported. To achieve the maximum responsiveness of this hydrogel nanocomposite to determine benzidine, various parameters such as pH, ionic strength, hydrogel nanocomposite concentration, sensitivity, and selectivity were investigated. The results of the investigations showed that the synthesized H-GQD has excellent stability, selectivity, and linearity range of 0.3 - 12 ppm with a limit of detection of 0.098 ppm. The results of the investigation of real water samples showed that the H-GQD has excellent recovery in the range of 93.3 - 106.6%. Finally, we believe that this H-GQD as a new and highly stable fluorescent probe can be a starting point for its application in various fields and industries to identify benzidine in water samples.
联苯胺是一种有毒且具有高度致癌性的物质，因此对其进行测定是一个至关重要的问题。到目前为止，尚未有基于水凝胶纳米复合材料的有效且稳定的荧光探针用于该物质的测定的报道。在这项工作中，首次报道了黄芪胶 - 聚（丙烯酸 - 共 - 丙烯酰胺 - 石墨烯量子点）水凝胶纳米复合材料（H - GQD）作为一种新型、高稳定性且选择性的荧光水凝胶纳米复合材料用于联苯胺鉴定的合成及应用。为了使这种水凝胶纳米复合材料对联苯胺的测定具有最大响应性，研究了诸如pH值、离子强度、水凝胶纳米复合材料浓度、灵敏度和选择性等各种参数。研究结果表明，合成的H - GQD具有优异的稳定性、选择性，线性范围为0.3 - 12 ppm，检测限为0.098 ppm。对实际水样的研究结果表明，H - GQD的回收率在93.3 - 106.6%范围内表现优异。最后，我们认为这种H - GQD作为一种新型且高度稳定的荧光探针，可以成为其在各个领域和行业中用于鉴定水样中联苯胺的应用起点。
