Concentration mass volume

Capture efficiency can also be measured by first estimating workspace emission rates and local exhaust emissions. The local exhaust emission rate equals the duct concentration (mass/volume) multiplied by the duct flow rate (volume/time). The workspace emission rates can be calculated using appropriate mass balance models and measured ventilation rates and workspace concentrations. Capture efficiency is the ratio of duct emission rate to total emission rate (duct plus workspace). ... 

Microorganism Influent Concentration - mass/ volume- influent... 

X2 = aeration basin microorganism concentration - mass/ volume X3 = Secondary Effluent microorganism concentration - mass/ volume Xr = Recycle and Wasted Solids Concentration V2 = Aeration Basin Volume... 

The state of a system is defined by its properties. Extensive properties are proportional to the size of the system. Examples include volume, mass, internal energy, Gibbs energy, enthalpy, and entropy. Intensive properties, on the other hand, are independent of the size of the system. Examples include density (mass/volume), concentration (mass/volume), specific volume (volume/mass), temperature, and pressure. 

Concentration Versus Mass Flow Rate. The most common type of chromatographic detector is one that produces a signal that is proportional to the concentration (mass/volume) of analyte. Typical examples are given in Table 1. The concentration to which the detector responds is the concentration of an analyte in the detector cell, and therefore the volume of the detector cell is important. Generally small cell volumes are desirable,... 

Standards can be expressed in various units, such as a load (mass/unit area), a dose (mass/body mass), or a concentration (mass/volume mass contaminant/mass soil). The use of a unit depends on the environmental compartment under consideration. We might consider the amount of pollution in water (a concentration), the consequences of equilibrium uptake by (or exposure to) a human (a dose), or the acceptable uptake by an ecosystem under steady conditions (the loading). The choice of unit depends on the point in a cycle or pollutant linkage at which we set the standard, as illustrated in Figure 3.1. 

It obviously applies that m /ms =gj/gs = qjqs>g and q denoting mass fractions and mass concentrations (mass/volume). If molar proportions of the components under analysis are to be determined, the peak areas have to be multiplied by the respective molar response factors the following relationships between molar (superscript n) and mass specific response factors hold ... 

You have learned about several different ways in which chemists express concentration mass/volume, mass/mass, and volume/volume percent parts per million and parts per billion and molar concentration. The Concept Organizer above summarizes what you have learned in this chapter so far. 

The units of S are concentration, mass/volume = m/l. The total mass of substrate is KS, where V is the volume of the vessel if F is the flow rate (the rate of the pump operating the chemostat) then the parameter D is defined as F/V. Rewriting the equation just displayed for the mass of the substrate in the vessel yields... 

Cj concentration of surface sites for chemisorption, sites/area Q total enzyme concentration, mass/volume... 

Cas surface concentration of adsorbate, sites/area Cis surface concentration of i, typically molecules or mols/area Cl C3 constants defined in equation (ii). Illustration 3.4 c constant defined in equation (3-20a) biomass concentration, mass/volume culture... 

Ci and F are, respectively, the ith species concentration (mass/volume) and flux (mass/surface time) t is time... 

The liquid that comes off the column is called the eluent. A detector with a flow cell is placed downstream to measure the concentration (mass/volume) of the polymer in the eluent. A differential refractometer is most commonly used to measure... 

C = polymer concentration, mass/volume Cg = adsorbed polymer concentration, mass/volume pore space... 

---