Apparatus and method for the collection of analytes on a dermal patch
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United States of America Patent
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Aug 8, 1995
Issued Date -
N/A
app pub date -
Mar 30, 1993
filing date -
Sep 8, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention is an improved method and apparatus for collecting analytes on a dermal patch, where the patch controls the ionization state of the analyte. This can be accomplished by delivering electricity to the patch or by a buffer or other means for controlling the pH of fluids entering the patch. Analytes in perspiration can be concentrated on the patch without the occurrence of significant back-diffusion of the analytes.
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