Many microporous materials (such as carbons, zeolites, and molecular sieves) retain helium in their pore structures after being exposed to helium. The helium penetrates deep into the pores and takes a long time to diffuse from the material.
A study was performed in which analyses were performed on a microporous carbon cloth exhibiting typical helium retention. The isotherm examples in this application note show the effect of using different run conditions to eliminate or minimize the helium retention effect.
Many microporous materials (such as carbons, zeolites, and molecular sieves) retain helium in their pore structures after being exposed to helium. The helium penetrates deep into the pores and takes a long time to diffuse from the material.
A study was performed in which analyses were performed on a microporous carbon cloth exhibiting typical helium retention. The isotherm examples in this application note show the effect of using different run conditions to eliminate or minimize the helium retention effect.
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