Abstract: Liquid sample collection devices, systems, and methods. In one example, the system includes a liquid collection device, a cap for the liquid collection device, and a sealed reagent liquid container installed in the cap, in which depressing the cap relative to the liquid collection device unseals the reagent liquid container. In another example, the system includes a liquid collector and a collection chamber in which the collection chamber holds a reagent in a sealed condition and the liquid collector is actuable to disrupt a sealing membrane associated with the collection chamber. In another example, the system includes a liquid collector and a collection chamber in which the liquid collector holds a reagent in a sealed condition and in which the liquid collector is actuable to drain the reagent from the liquid collector into the collection chamber.

Abstract: The basis of this invention consists of the formation of microemulsions from a polar antioxidant-rich fraction in an oily medium, specifically in edible oils. These microemulsions are characterized in that their stability and homogeneity makes them suitable to incorporate them in different foods or pharmaceutical products. The most novel factor of this invention is that the critical micellar concentration (CMC) is attained by vacuum elimination of the excess polar solvent, which is the antioxidant matrix, leaving part of this solvent in the microemulsion, acting as co-surfactant.