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1. WO1999009404 - METHOD AND APPARATUS FOR AUTOMATIC ANALYSIS

Publication Number WO/1999/009404
Publication Date 25.02.1999
International Application No. PCT/AU1998/000642
International Filing Date 13.08.1998
Chapter 2 Demand Filed 19.01.1999
IPC
G01N 27/403 2006.1
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
26by investigating electrochemical variables; by using electrolysis or electrophoresis
403Cells and electrode assemblies
G01N 35/00 2006.1
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
35Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/-G01N33/148; Handling materials therefor
CPC
G01N 27/4168
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
26by investigating electrochemical variables; by using electrolysis or electrophoresis
416Systems
4166measuring a particular property of an electrolyte
4168Oxidation-reduction potential, e.g. for chlorination of water
G01N 35/00029
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
35Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
00029provided with flat sample substrates, e.g. slides
Applicants
  • USF FILTRATION AND SEPARATIONS GROUP INC. [US]/[US] (AllExceptUS)
  • MAXWELL, Ian, Andrew [AU]/[AU] (UsOnly)
  • BECK, Thomas, William [AU]/[AU] (UsOnly)
  • HODGES, Alastair, McIndoe [AU]/[AU] (UsOnly)
Inventors
  • MAXWELL, Ian, Andrew
  • BECK, Thomas, William
  • HODGES, Alastair, McIndoe
Agents
  • BALDWIN SHELSTON WATERS
Priority Data
PO 855813.08.1997AU
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR AUTOMATIC ANALYSIS
(FR) TECHNIQUE D'ANALYSE AUTOMATISEE ET DISPOSITIF AFFERENT
Abstract
(EN) A method for estimating the concentration of a reduced (or oxidised) form of a redox species in a liquid comprises contacting an area of a first electrode (2) with a sample (5) of the liquid, contacting the sample (5) with a second electrode (2) spaced apart from the first (2), applying a potential between the electrodes while the electrodes are sufficiently closely spaced that reaction products formed at each electrode diffuse to the other electrode while the potential is applied, measuring or estimating a value indicative of the change in current as a function of time and a value indicative of the steady state current, and determining from said volume, said current as a function of time, and said steady state current the concentration of reduced (or oxidised) form of the species in the liquid sample.
(FR) Cette technique, permettant d'évaluer la concentration dans un liquide d'une forme réduite ou oxydée d'une espèce redox, consiste à mettre en contact une zone d'une première électrode (2) et un échantillon (5) d'un liquide, puis à mettre en contact cet échantillon (5) avec une seconde électrode (2) distincte de la première (2) et à appliquer un potentiel entre les électrodes alors que celles-ci sont suffisamment proches. Les produits réactionnels formés à chaque électrode diffusent d'une électrode à l'autre lorsque le potentiel est appliqué. On mesure alors une valeur indicative des modifications du courant en fonction du temps et d'une valeur représentative du courant en régime permanent ou on l'estime, ce qui permet d'établir une détermination du courant en fonction du temps et, à partir de ce courant en régime permanent, de déterminer la concentration dans l'échantillon de liquide de la forme réduite ou oxydée de l'espèce.
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