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灵敏度检测及性能分析
基底均匀性检测及性能分析
牛奶样品中三聚氰胺的快速筛选
通信作者
Facile SERS screening of melamine in bovine milk with 2D printed AgNPs/glass fabric filter paper as the flexible substrate
Shiyao Wanga,b,1, Yanan Zhaoa,b,1, Xiao Weic, Yisheng Chena,b,*
a College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China
b Food Nutrition and Safety Institute, Shanxi Agricultural University, Taiyuan 030031, China
c School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
1 Both authors contributed equally.
*Corresponding author.
Abstract
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 1.9498×10−5 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=0.9909) within the range of 0.0001-1 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.
Reference:
WANG S Y, ZHAO Y N, WEI X, et al. Facile SERS screening of melamine in bovine milk with 2D printed AgNPs/glass fabric filter paper as the flexible substrate[J]. Food Science and Human Wellness, 2024, 13(5): 2595-2600. DOI:10.26599/FSHW.2022.9250208.
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