Steris Inc.

Karen L Thomas

Brian E Schindly

Christopher M Fricker

David E Minerovic

Todd A Christopher

Iain McVey

Jan J Lewandowski

Michael F Jusek

Brian J DeSantis

An electrochemical sensor (A, A&prime;) is specific for the detection of peroxyacetic acid in a solution which also contains hydrogen peroxide. A potential is applied between a reference electrode ( &prime;) and a working electrode ( &prime;). A read voltage (FIG. ) is selectively pulsed across a counter electrode ( &prime;) and the working electrode. The current flowing between the working electrode and the counter electrode is dependent on the peroxyacetic acid concentration in the solution (FIG. ). By careful selection of the read voltage, the contribution of hydrogen peroxide to the current flow is virtually negligible. The sensor effectively measures peroxyacetic acid concentrations in the range generally employed in sterilization and disinfection baths (100-3000 ppm.).

Electrochemical sensor for the specific detection of peroxyacetic acid in aqueous solutions using pulse amperometric methods

An outer, first container portion (,) has a peripheral wall (,) which has an opening at a first end (,) and at a second end (,). A porous filter (,) covers the second end. An inner, second container portion (,) has a peripheral wall (,) with a region which is formed from a first material which is impermeable to the powdered reagents but is permeable to water and to solutions containing dissolved reagents. The first and second container portions are configured such that the second container portion peripheral wall abuts and is connected to the first end of the outer first container portion. The first and second container portions define a first powdered reagent receiving chamber in the first container portion for receiving a first reagent and a second powdered reagent receiving chamber in the second container portion for receiving a second reagent. The porous filter is impermeable to the first reagent but permeable to water and to solutions containing dissolved reagents.

Antimicrobial composition delivery system with an integrated filler

An outer, first cup portion having a peripheral wall which has an opening at a first end and at a second end. An inner, second cup portion having a region which is formed from a first material which is impermeable to the powdered reagents but is permeable to water and to solutions containing dissolved reagents, the first and second cup portions being configured such that the second cup portion peripheral wall abuts and is connected to the first end of the outer first cup portion, the first and second being configured such that a first powdered reagent receiving chamber is defined in the first cup portion for receiving a first reagent and a second powdered reagent receiving chamber is defined in the second cup portion for receiving a second reagent, a closure secured to and closing the second end of the outer first cup portion, the closure being impermeable to the first reagent.

Multi-compartment plastic woven mesh dry chemistry container

Growing community of inventors

Eastlake, OH, United States of America

Karen L Thomas