A trace metal analysis detector and method of operating the same to detect metals in various fluid samples using boron doped diamond working electrodes.

A trace metal analysis detector and method of operating the same to detect metals in various fluid samples using boron doped diamond working electrodes.

An electrochemical measurement system (1) includes: an insertion mechanism (4) which is capable of moving relative to a microplate (2) having a plurality of reactors which are arrayed and which contain a respective plurality of types of solutions, the plurality of types of solutions being mixtures of a plurality of types of mother liquids in different proportions; and a microelectrode unit (19) which is attached to the insertion mechanism (4) such that the microelectrode unit (19) is capable of being inserted into the plurality of types of solutions contained in the plurality of reactors.

An electrochemical measurement system (1) includes: an insertion mechanism (4) which is capable of moving relative to a microplate (2) having a plurality of reactors which are arrayed and which contain a respective plurality of types of solutions, the plurality of types of solutions being mixtures of a plurality of types of mother liquids in different proportions; and a microelectrode unit (19) which is attached to the insertion mechanism (4) such that the microelectrode unit (19) is capable of being inserted into the plurality of types of solutions contained in the plurality of reactors.

Method and system for detection and quantification of oxidizable organics in water. The method involves the partial electrolytic decomposition of the oxidizable organics in a short time frame, preferably less than five seconds, and does not involve the use of toxic reagents. The system includes an electrochemical sensor probe that, in turn, includes a boron-doped diamond microelectrode array. The system additionally includes an electronic transducer and a computing device. The system utilizes an analysis technique to convert sensor signal to a result that can be correlated with COD or BOD values obtained by standard methods. The method and system are particularly suitable for, but not limited to, use in monitoring of water quality at wastewater treatment plants. By employing the method before and after adding aerobic microorganisms to the sample, the method may be used to distinguish biologically oxidizable organics from total oxidizable organics.

Disclosed are methods of measuring moisture. Specifically, methods of measuring moisture on dry or nearly dry surfaces using an electrochemical sensor are disclosed. The method comprises applying a coating comprising an electrolyte to an electrode wherein water in the air can permeate the coating, applying a voltage to the electrode, detecting a current and, determining if the current indicates the presence of moisture. As a voltage is applied, oxygen in the water is reduced and produces a measurable signal. The method includes measuring the amount of or decrease of dissolved oxygen (in the form of water) at the surface of the electrode over time. Reduction of oxygen acts as a surrogate for water/moisture and, as such, the dryness of the surface of the electrode is calculated based on a predetermined relationship between current and dissolved oxygen (in the form of water).

A sensor for detecting lead in an aqueous solution includes a copper working electrode, a counter electrode, a power supply for applying underpotential deposition of lead onto the copper electrode from the aqueous solution, a measuring device for providing measurement of a hydrogen evolution reaction (HER) current on the Pb.sub.upd-modified electrode, and a means for correlating the degree of suppression of the HER current to Pb.sub.upd coverage to determine the lead coverage and lead concentration of the solution.

A sensor for detecting lead in an aqueous solution includes a copper working electrode, a counter electrode, a power supply for applying underpotential deposition of lead onto the copper electrode from the aqueous solution, a measuring device for providing measurement of a hydrogen evolution reaction (HER) current on the Pb.sub.upd-modified electrode, and a means for correlating the degree of suppression of the HER current to Pb.sub.upd coverage to determine the lead coverage and lead concentration of the solution.

Provided herein is a method for measuring a concentration of a metal ion in an electrodeposition solution. The method of the present disclosure can substantially reduce the interference of organic additives and different electrode conditions on voltammetric metal ion concentration measurements.

Provided herein is a method for measuring a concentration of a metal ion in an electrodeposition solution. The method of the present disclosure can substantially reduce the interference of organic additives and different electrode conditions on voltammetric metal ion concentration measurements.