Abstract
This paper describes the gas analysis of oxygen flowing through a silver permeation membrane into an ultrahigh vacuum system. The initially contaminated silver emits gases such as hydrogen sulfide, sulfur dioxide, and carbon oxides more copiously than oxygen during the first hour of operation. After the initial conditioning of the membrane, high purity oxygen is obtained. The ultrahigh vacuum system shows long term effects of early exposure to sulfur bearing gases even after several hours of bakeout.

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