領(lǐng)學(xué)術(shù)科研之先,創(chuàng)食品科技之新
—— 中國食品雜志社
期刊集群
Facile SERS screening of melamine in bovine milk with 2D printed AgNPs/glass fabric filter paper as the flexible substrate
來源:導(dǎo)入 閱讀量: 96 發(fā)表時(shí)間: 2024-11-07
作者: Shiyao Wang, Yanan Zhao, Xiao Wei, Yisheng Chen
關(guān)鍵詞: 2D print; Melamine; Milk; Surface-enhanced Raman spectroscopy (SERS) flexible substrate
摘要:

Melamine is one of the most frequently detected adulterants in dairy products. The current study proposes a surface-enhanced Raman spectroscopy (SERS)-based analytical tool for fast and reliable screening of melamine in bovine milk. A hand-held Raman spectrometer was used in conjunction with a substrate composed of silver nanoparticles (AgNPs) that was 2D printed onto glass fiber (GF) filter paper. Under optimized conditions, a sensitive and fingerprint-like signal at 674 cm?1 was obtained. The AgNPs/GF substrate exhibited high sensitivity to melamine in milk down to 1.949 8 × 10?5 mg/mL, which is well below the USA and EU safety limits (2.5 × 10?3 mg/mL). Remarkably, the proposed technology was also highly reproducible, showing spot-to-spot and block-to-block variations below 3.3% and 4.9% at 674 cm?1 in Raman intensity, respectively. The characteristic peak intensity and concentration of melamine showed an acceptable linear relationship (R2 = 0.990 9) within the range of 0.000 1–1 mg/mL. Overall, the method established in this study can provide an efficient and effective method for the quantitative target screening and detection of melamine in dairy products.

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