Chemistry: analytical and immunological testing – Including sample preparation – Liberation or purification of sample or separation of...
Patent
1989-03-30
1990-03-27
Richman, Barry S.
Chemistry: analytical and immunological testing
Including sample preparation
Liberation or purification of sample or separation of...
436 52, 436 53, 436 54, 436 55, 436165, 436167, 436168, 436172, 436909, 422 52, 422 86, 422 88, 422 91, 422 56, 422 89, 422 98, 55 16, 55158, G01N 118
Patent
active
049120514
ABSTRACT:
A system for detecting analytes in air or aqueous systems includes a permeation absorption preconcentrator sampler for the analytes and analyte detectors. The preconcentrator has an inner fluid-permeable container into which a charge of analyte-sorbing liquid is intermittently injected, and a fluid-impermeable outer container. The sample is passed through the outer container and around the inner container for trapping and preconcentrating the analyte in the sorbing liquid. The analyte can be detected photometrically by injecting with the sorbing material a reagent which reacts with the analyte to produce a characteristic color or fluorescence which is detected by illuminating the contents of the inner container with a light source and measuring the absorbed or emitted light, or by producing a characteristic chemiluminescence which can be detected by a suitable light sensor. The analyte can also be detected amperometrically. Multiple inner containers may be provided into which a plurality of sorbing liquids are respectively introduced for simultaneously detecting different analytes. Baffles may be provided in the outer container. A calibration technique is disclosed.
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Fisher Robert J.
Glenn Hugh W.
Kummert Lynn M.
Moser William R.
Richman Barry S.
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