Permeation absorption sampler with multiple detection

Patent · Tue Mar 27 00:00:00 EST 1990

OSTI ID:7070738

Zaromb, S

This patent describes a system for detecting analytes in air or aqueous systems which 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.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4912051; A
• Application Number: PPN: US 7-330654A
• OSTI ID: 7070738
• Resource Relation: Patent File Date: 30 Mar 1989
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
47 OTHER INSTRUMENTATION
AIR
QUANTITATIVE CHEMICAL ANALYSIS
SAMPLERS
ABSORPTION
DESIGN
LIGHT SOURCES
MEASURING INSTRUMENTS
CHEMICAL ANALYSIS
EQUIPMENT
FLUIDS
GASES
RADIATION SOURCES
400100* - Analytical & Separations Chemistry
440800 - Miscellaneous Instrumentation- (1990-)