#### The Mathematics Behind Partial Pressure Gas Blending

2 mix). In EAN, oxygen is used to displace (or dilute) the amount of nitrogen. We know that the total pressure of the mix is the sum of the pressures of the component gases; in this case, the component gases are air and oxygen (Figure 1.3). For some desired pressure (denoted P D) of a particular EANx mix (denoted M D), we know that: P D M D = P