After reaction has completed, each of the discretely injected gas volumes emerge from the sample tube unchanged and the detected peaks are constant in area. The quantity of molecules chemisorbed is the difference between the total amount of reactant gas injected and the sum amount that did not react with the active sites of the sample as measured by the detector. The quantity of each pulse of reactant gas is determined by an injection loop on an electrically operated valve. Three loops of different sizes are provided with the analyzer. Pulse Chemisorption Plot Signals produced by successive injections of equal volumes of adsorptive gas onto the sample.
Peaks represent unabsorbed analysis gas.
The AutoChem 2910 automatically stops data collection when two or more peaks exhibit the same area, an indication of saturation. Table of Reduced Data from a Pulse Chemisorption Analysis Signals produced by successive injections of equal volumes of adsorptive gas onto the sample. Peaks represent unabsorbed analysis gas. The AutoChem 2910 automatically stops data collection when two or more peaks exhibit the same area, an indication of saturation.