Process and measuring system for detection of substances emitted or perspired through the skin
AssigneesTrace Analysensysteme GmbH, Moller Feinmechanik GmbH & Co., META Mebtechnische Systeme GmbH
InventorWolfgang Kuennecke
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Abstract
The process for detection and for quantitative determination of substances emitted or perspired through the skin is derived from flow diffusion analysis. The measuring system conceived for this purpose uses a diffusion half cell through which an acceptor medium flows and which is closed by a membrane. For the duration of the measurement, the membrane is brought into contact with the skin or a closed gas volume formed over the skin. With the process and the related measuring system, the blood alcohol level can be determined with a good degree of precision indirectly via the quantity of (gaseous) ethanol emitted through the skin.
Claims13
A process for detection of a substance emitted or perspired through the skin by means of a detection system responding to samples of the substance, the process using flow diffusion analysis and comprising the steps of:
- flowing an acceptor medium to a diffusion half cell which is closed with a membrane, the membrane being adapted to be placed onto the skin of a person to be examined or brought into contact with a closed gas volume formed over the skin;
- bringing into contact the substance to be detected and the membrane;and
- feeding the acceptor medium laded with the substance to be detected to the detection system for detection of the substance.
Dependencies are inferred from the claim text.