Traditional methods to physically characterize delivery systems

Abstract This chapter provides an overview of the traditional methods used to physically characterize delivery systems in the form of emulsions. Firstly, it reviews methods that are commonly used to study liquid interfaces such as pendant drop tensiometry and Langmuir monolayers. Secondly, it shows methods for physical characterization of emulsions such as droplet size and electrophoretic mobility. Finally, the use of atomic force microscopy to physically characterize interfaces and measure forces between emulsion droplets is presented. As a result, the chapter offers a combined overview of the link between molecular, interfacial, and colloidal properties of possible routes to control stability and delivery via interfacial engineering.