Chemical signal-impermeable mask

Details Chemical signal-impermeable mask Chemical signal-impermeable mask

1998-08-04

2000-10-31

Nasser, Robert L.

Surgery

Diagnostic testing

Measuring or detecting nonradioactive constituent of body...

604 20, 604304, A61B 500

Patent

active

061415731

ABSTRACT:
A chemical signal-impermeable mask is positioned in the electrolyte flow such that the mask is between a source of chemical signal and a working electrode which senses the chemical signal transported from the source (e.g., by diffusion). The configuration of the mask is such that the mask prevents substantially all chemical signal transport from the chemical signal source having a radial vector component relative to a plane of the mask and the catalytic face of the working electrode, thus allowing primarily only chemical signal transport that is substantially perpendicular to the place of the mask and the catalytic surface of the working electrode. By reducing or eliminating chemical signal radial transport toward the working electrode, the mask thus significantly reduces or eliminates edge effects. By substantially reducing edge effects created by radial transport of chemical signal, it is possible to obtain a more accurate measurement of the amount (e.g., concentration) of chemical signal that is transported from a given area of source material.

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