A new method for extracting microfluidics by combining two droplets into single droplet using a mixing and diffusion-based droplet system mechanism
Abstract
A new and highly efficient method for extracting micro-sized liquids using droplet system is presented by mixing two microdroplets to form a single droplet by utilizing mixing and diffusion mechanism. This working system has the potential It is applied to a wide range of chemical and biological analysis. It is very suitable for microfluidics, has short operation time, no environmental pollution, and has a simple assembly design that can be installed anywhere in the laboratory. The main working design consists of several main components: a two-line micropump device to pump or withdraw the aqueous and organic layer through two rubber microtubes connected to two microneedles (with specific size) to generate aqueous and organic droplets. The two needles are fixed by two magnetic holders based on two graduated holders, and then the microextraction is enhanced by a micromixer to complete the mixing process. by diffusion. Several key variables affecting this microextraction were studied, including the optimal concentration of copper (II) chloride (10-4M) representing the metal ion, and the optimal concentration of diathazone solution (10-4M) representing the organic reagent solution. The effect of micropump speed (200 μl/30 s), micromixer speed (maximum), micropump type rubber tubing (Tygon E-Lab tubing 1.2 mm) was studied, and under these optimum conditions the extraction degree was (97±2%).
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