Temperature programming high-speed

HIGH-SPEED TEMPERATURE PROGRAMMING 5.11.1 Limitations of Convection Ovens... 

FIGURE 5.24 High-speed temperature-programmed separation of a 20-component pesticide mixture without stop-flow operation (a), with a 2-s-wide stop-flow pulse to separate components 2 and 3 and (c), and with two stop-flow pulses to separate component pairs 2,3 and 10,11. Components are 1, a-BHC 2, P-BHC 3, y-BHC, 4, 8-BHC 5, heptachlor 6, aldrin 7, heptachlor epoxide 8, a-chlordane 9, y-chlordane 10, 4,4 -DDE 12, dield-rin 13, endrin 14, 4,4 -DDD 15, endosulfan II, 16, 4,4 -DDT 17, endrin aldehyde 18, metoxychlor 19, endosulfan sulfate 20, impurity 21 endrin ketone. 

In addition to the high-pressure assembly, the modified system incorporates a new real-time data collection system coupled with a PC based computer. Experimental parameters, such as the valve firing sequence and the reactor temperature-control program, can be set from the computer. Reactants are introduced through two high-spe pulse valves or two continuous feed valves that are fed by mass flow controllers. In high-speed transient response experiments, the QMS is set at a particular mass value and the intensity variation as a function of time is obtained. In steady-flow experiments. 

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