Structural design and research of combined microfluidic chips for pesticide residue detection

doi:10.1016/j.sbsr.2025.100918

Structural design and research of combined microfluidic chips for pesticide residue detection

2025-11-14

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DOI：10.1016/j.sbsr.2025.100918

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• The diffusion coefficient used in this study was 1e-10 m2/s. When the Reynolds number was equal to 1, the mixing index reached 0.9549. At low Reynolds numbers, compared with some other scholars, the diffusion coefficient we used is smaller. Or, at the same diffusion coefficient, our mixing index is higher. • The research proceeded through five steps: microfluidic chip structure design, simulation modeling, chip preparation, mixing test, and chemical experiment verification. The entire process systematically studied the mixing performance of the helical microfluidic chip. • The research results show that the designed microfluidic chip exhibits excellent and stable mixing performance within the low Reynolds number range. This provides an important theoretical basis and technical support for the development of low-cost, high-performance and highly reliable rapid pesticide residue detection devices. It is of great significance for promoting the practical application of microfluidic technology in environmental monitoring, biomedicine and other fields. • Based on the data results obtained from the simulation modeling, visualized mixing experiments and data-based chemical experiments were used for verification. Both indicated that the helical microfluidic chip has excellent mixing performance, making the research more scientific and reasonable, and more persuasive.

Keywords:

Microfluidics

3D printing

Modular

Complex cross-section

Pesticide residue testing

Structural design and research of combined microfluidic chips for pesticide residue detection

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