Tufts College

Tufts University

Leland Stanford Junior University

Northeastern University

O. I. Corporation, Inc.

Samuel P Kounaves

Gregory T Kovacs

Geoffrey Davies

Albert Robbat, Jr

Melissa A Nolan

Christopher W Storment

The invention disclosed is a total organic carbon (TOC) analyzer comprised of an electrochemical cell comprising a diamond-film electrode doped with boron or other conductivity inducing material. The diamond-film electrode is the working electrode and carries out the oxidation of TOC to produce carbon dioxide. The apparatus further comprises sensors for detecting the carbon dioxide produced. Such sensors include but are not limited to a tunable diode laser and/or ion-selective electrode. The invention also discloses a method for measuring TOC in an aqueous solution using a total organic carbon analyzer.

Total organic compound (TOC) analyzer

The invention disclosed is a total organic carbon (TOC) analyzer comprised of an electrochemical cell comprising a diamond-film electrode () doped with boron or other conductivity including material. The diamond-film electrode is the working electrode and carries out the oxidation of TOC to produce carbon dioxide. The apparatus further comprises sensors for detecting the carbon dioxide produced. Such sensors include but are not limited to a tunable diode laser () and/or ion-selective electrode (). The invention also discloses a method for measuring TOC in an aqueous solution using a total organic carbon analyzer.

Total organic carbon (TOC) analyzer

An ultramicroelectrode is disclosed which includes a) a silicon substrate; b) a silicon oxide insulating layer; c) a titanium adhesion layer; d) an iridium layer; e) a gold bond pad layer; f) a titanium adhesion layer; and g) a silicon dioxide insulating layer. In a preferred embodiment, the f) and g) layers have been partially or totally removed. Preferably, the ultramicroelectrode of the invention does not include mercury.

Microfabricated array of iridium microdisks

An electrode assembly for use in quantifying the levels of various metals in an aqueous solution. In one embodiment, the electrode assembly comprises a substrate, the substrate being a silicon chip upon which a layer of silicon dioxide has been grown. A plurality of gold bond pads and gold interconnect traces are deposited by microphotolithography onto the silicon dioxide layer. An array of iridium deposits are then patterned by microphotolithography onto the interconnect traces at predefined locations. A passivation layer is deposited by plasma enhanced chemical vapor deposition over the finished metallization to electrically insulate it from external solutions. Plasma etching is then used to expose at least a portion of each of the iridium deposits. Just prior to analytical use, one or more of the exposed iridium elements are electroplated with mercury. The present invention is also directed to a field deployable sensor including the above-described electrode assembly.

Electrode assembly including iridium based mercury ultramicroelectrode

A novel method for making metals and homogeneous metal alloys comprises the steps of (a) providing a polymetallic complex of the general formula

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Winchester, MA, United States of America

Samuel P Kounaves