Patent ID: 9470615
Filing Date: 2016-10-18
CPC Classification: G01N

Claim Text:
1. Method for determining the permeation rate of barrier materials, wherein in a measuring chamber ( wherein in a process step (i), the measuring chamber ( the time course of this permeate concentration (c) is either determined up to the reaching of a predefinable lower switchover concentration (cvS) in the first measurement variant, with a purge time (tS) being determined in this respect, or up to the reaching of a predefinable purge time (tvS) in the second measurement variant; and in a process step (ii), on reaching the predefinable lower switchover concentration (cvS) in the first measurement variant or on reaching the predefinable purge time (tvS) in the second measurement variant, the measuring chamber ( an enriching time (tA) up to the reaching of the predefinable upper switchover concentration (cvA) being determined in the first measurement variant; and subsequently using the enriching time (tA) and using the purge time (tS) determined in process step (i) using the first measurement variant and using the course of the permeate concentration (c) determined during the purge time (tS), or the course of the permeate concentration (c) during the predefinable purge time (tvS) being determined in the process step (i) of the second measurement variant, the predefinable purge time (tvS) and the predefinable enriching time (tvA), the permeation rate (P) of the barrier element ( where t