Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1997-04-17
1999-11-02
Le, Long V.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
422 81, 422 8201, 436149, 436163, 436180, 204403, 204416, 204433, G01N 27333
Patent
active
059764651
ABSTRACT:
Analyzers determine the concentration of a test substance by measuring the change of pH in a sample liquid after reaction of the test substance with a reactant. The analyzers have a tube connected between first and second microcapillary pH electrodes. In a first embodiment, the tube functions as a reaction chamber by having a reactant immobilized on a wall of the tubing or confined within the tubing. In a second embodiment, the reactant and test substance are mixed upstream relative to the first and second microcapillary pH electrodes, with the tubing serving as a delay circuit for a kinetic measurement. Output signals of the microcapillary flow-through electrodes are used to determine a change in pH, the change in pH being indicative of the concentration of the test substance.
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patent: 5192509 (1993-03-01), Surjaatmadja et al.
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Luzzana Massimo
Rossi Bernardi Luigi
Le Long V.
Universita Degli Studi Di Milano
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