基于土伦试剂的纳米金（AuNPs）比色传感阵列用于醛的鉴别

ldehydes 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.