The properties, features and areas of application of carbon quantum dots are described. Due to the wide range of radiation and ease of use, quantum dots are promising as labels for visualization of results in test systems. The choice of microfluidic technology for use in test systems is substantiated, its advantages over classical methods are discussed. The algorithm for manufacturing a microfluidic device (MFD) from polydimethylsiloxane by the soft lithography method is described in detail. The synthesis of a stable emulsion of carbon quantum dots is implemented. The optimal synthesis parameters are selected: speed and pressure. The resulting emulsions are analyzed, conclusions are made about the possibility of their use in test systems.