An instrument-free, integrated micro-platform for rapid and multiplexed detection of dairy adulteration in resource-limited environments

文献类型： 外文期刊

第一作者： Wang, Nan

作者： Wang, Nan;Sun, Xiaoyun;Zhang, Juan;Huang, Fengchun;Chen, Ailiang;Chen, Ying;Zhang, Jiukai

作者机构：

关键词： Dairy adulteration; Microfluidics; Lateral flow strip; Instrument-free; Multi-testing

期刊名称：BIOSENSORS & BIOELECTRONICS （ 影响因子：12.6； 五年影响因子：10.8 ）

ISSN： 0956-5663

年卷期： 2024 年 257 卷

页码：

收录情况： SCI

摘要： In dairy industry, expensive yak's milk, camel's milk, and other specialty dairy products are often adulterated with low-cost cow's milk, goat's milk and so on. Currently, the detection of specialty dairy products typically requires laboratory settings and relies on skilled operators. Therefore, there is an urgent need to develop a multidetection technology and on-site rapid detection technique to enhance the efficiency and accuracy of the detection of specialty dairy products. In this study, we introduced a fully integrated and portable microfluidic detection platform called Sector Self-Driving Microfluidics (SDM), designed to simultaneously detect eight common species-specific components in milk. SDM integrated nucleic acid extraction, purification, loopmediated isothermal amplification (LAMP), and lateral flow strip (LFS) detection functions into a closed microfluidic system, enabling contamination-free visual detection. The SDM platform used a constanttemperature heating plate, powered by a mobile battery, eliminated the need for additional power support. The SDM platform achieved nucleic acid enrichment and transfer through magnetic force and liquid flow driven by capillary forces, operating without external pumps. The standalone SDM platform could detect dairy components with as low as 1% content within 1 h. Validation with 35 commercially available samples demonstrated 100% specificity and accuracy compared to the gold standard real-time PCR. The SDM platform provided the dairy industry with an efficient, convenient, and accurate detection tool, enabling rapid on-site testing at production facilities or sales points. This facilitated real-time monitoring of quality issues during the production process, quickly identifying potential risks and preventing substandard products from entering the market.

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