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An accurate and simple method of measuring relative mass spectrometric sensitivities An ~nderstanding of the nature of the chemical processes occuring in dynamic, reactlve, gaseous systems, such as hydrocarbon flames and chemical lasers requires knowledge of the chemical species that actually exist· in these sys~ems.This paper reports th~ design and use of a flow-type reactor tube which is passed thro~gh the ion source of a mass spectrometer permitting the components of a reactlDg gas phase system to be extracted adiabatically through a 10 ,." orifice into the ion source for analysis. The procedure for drilling this orifice with a focused CO 2 laser is presented, together with data which indicate that the reactive species extracted from a flame zone are representative of those existing within the reactive system.

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