Fast detection of sodium tripolyphosphate using gold nanoflowers coated with luminol and chitosan as a chemiluminescent probe

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• 作者：Jiayan Du ; Yi He
• 关键词：Chemiluminescence ; STPP ; Gold nanomaterial ; Transmission electron microscopy ; Aggregation ; Food analysis
• 刊名：Microchimica Acta
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：184
• 期：2
• 页码：563-568
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Nanochemistry; Nanotechnology; Characterization and Evaluation of Materials; Analytical Chemistry; Microengineering;
• 出版者：Springer Vienna
• ISSN：1436-5073
• 卷排序：184

文摘

The authors report on a fast chemiluminescence (CL) assay for the food additive sodium tripolyphosphate (STPP). It is based on the use of gold nanoflowers (AuNFs) bifunctionalized with luminol and chitosan that act as a CL probe and a molecular recognitions systems because chitosan can bind STPP. In the absence of STPP, the luminol-chitosan-AuNF CL system is triggered by addition of H₂O₂ and Co(II) ions. However, on addition of STPP, modified AuNFs bind STPP and aggregate. This suppresses CL. Under optimized conditions, the system responds to STPP in the 0.7 to 700 μM concentration range, and the limit of concentration is as low as 0.5 μM. This is lower than that of other analytical techniques for STPP. The method was applied to the determination of STPP in (spiked) ham samples, and recoveries ranged from 98% to 107% with a relative standard deviation of <5.0%.