基于土倫試劑的納米金(AuNPs)比色傳感陣列用于醛的鑒別
首發時間:2021-09-24
摘要:醛類是日常生活中最常見的污染物和致癌物質。本文報道了一種操作簡便且價格低廉的醛類的鑒別方法?;谕羵愒噭┑募{米金比色傳感器陣列與醛類物質發生反應,生成銀殼并包覆于不同配體修飾的金納米粒子上(包括牛血清白蛋白(BSA)、聚乙烯吡咯烷酮(PVP)和L-半胱氨酸(Cys)),形成銀包金的核殼結構,伴隨有從酒紅色到深黃色的顏色變化并以此鑒別出10種醛類。所提供的傳感器陣列具有很強的分辨能力,準確率和特異性均在88%以上。在最適條件下,歐氏距離與甲醛濃度在0.1~10000 uM的范圍呈現良好的線性關系。該傳感器用于蝦中甲醛含量的測定,回收率為85.8%~114.82%。納米金傳感器展現了快速識別食品中醛類化合物的潛力。
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Detection of aldehydes by gold nanoparticles colorimetric array based on Tollens\' reagent
Abstract:Aldehydes are the most common pollutants and the most possible human carcinogens in our life. Herein, we reported an easy-to-operate and low-cost method for discrimination of diverse aldehydes. The colorimetric sensor array based on Tollens\' reagent allow discrimination of ten kinds of aldehydes showing a significant color change distinct color change from wine-red to deep yellow. And it would generate Ag shells that coated onto gold nanoparticles (GNPs) functionalized with diverse ligands, (including bovine serum albumin (BSA), polyvinylpyrrolidone (PVP) and L-cysteine (Cys)), forming an Au@Ag core-shell nanoparticles in the presence of aldehydes. Provided sensor array owns great discrimination capacity of differentiating ten kinds of aldehydes by color change which accuracy and specificity were over 88%. Under optimal conditions, a good linear correlation between Euclidean distance and formaldehyde concentrations was ranged from 0.1 to 10000 uM (R2 = 0.9908). The sensor was successfully explored for the determination of formaldehyde content in shrimp with recovery of 85.8% to 114.82%. Our reliable GNPs sensor shows reliable potentiality for fast identification of aldehydes in food.
Keywords: Gold nanoparticles colorimetric sensor arrays aldehydes discrimination Tollens\' reagent
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基于土倫試劑的納米金(AuNPs)比色傳感陣列用于醛的鑒別
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