G - Physics – 01 – N
Patent
G - Physics
01
N
354/30
G01N 35/08 (2006.01)
Patent
CA 1306300
APPARATUS AND METHOD FOR ANALYSIS OF LIQUID SAMPLES Abstract A fluid injection analysis apparatus (10) and method has a liquid stream (13) and a detector (12) and a computer (11) which operates to observe properties in the composition of the fluid stream and compare detected data from observed samples with standards and in accordance with parameters established by calibration calculate the characteristics of the observed samples. An integral but segmented liquid stream (13) flows through the analysis system (10) to provide liquid segments of observed sample and reagent. A detector (12) scans data from the samples at the interface between these segments and information relating to the composition at the interface is analyzed by a mathematical model that permits comparison of the detected data from successively observed samples with standards and thus determines the characteristics of the samples. The information includes values such as electrical conductivity, concentrations, and compo- sitions of the samples and the operation rapidly and precisely analyzes and records multiple samples. The segmented integral liquid stream (13) is fashioned by step pulsing of discrete segments of reagents and samples and transporting the discrete segments to a detector (12). The analysis system (10) is driven by a vacuum assembly (16) and valves (23a, 28b, 28c, 28d and 36) are opened to draw samples and reagents into tubing (14) and form the segments in the absence of air so that the respective sample and reagent segments interface with each other. A plurality of source tanks (20) provide the liquid samples and reagents for the segmented, integral liquid stream (13) and the vacuum assembly (16) creates a force which forms and drives the samples and reagents through conduit means (21), (23), (27), (14) and 138) to the detector (12). The detector (12) is positioned between the source tanks (20) and the vacuum assembly 16 so that stream (13) is passed through the detector (12) to the vacuum assembly (16).
537505
Davidson David L.
Gubisch Roland W.
Hauer Harold
Parrent George B. Jr.
Hercules Incorporated
Macrae & Co.
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