There is a need to develop techniques to control the processing of nanometer scale particles to generate new materials. While batch processes have been used in the past, the disadvantages of these batch reactions demand that new avenues be explored. Using microfluidic devices to carry out the same chemistry continuously is one way to circumvent some of these disadvantages. We are interested in using the polyol process, a well documented batch reaction, in the synthesis of gold particles in a continuous single phase microfluidic channel network. The goal of this work is to determine the polydispersity of the particle distribution as a function of the residence time in a single phase microfluidic network. The impact of separating nucleation and growth mechanisms on particle size distributions is discussed and compared to the product in batch reactions.