Automated dissolved oxygen and biochemical oxygen demand analyze

Details Automated dissolved oxygen and biochemical oxygen demand analyze Automated dissolved oxygen and biochemical oxygen demand analyze

1994-11-28

1996-07-02

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

422 67, 422 681, 422 8204, 435 34, 435 39, 436 50, 7386424, 210 961, G01N 3100

Patent

active

055319602

ABSTRACT:
An automated method and apparatus for determining the dissolved oxygen (DO) content and the biochemical oxygen demand (BOD) of multiple test samples includes a sample set containing several test sample containers, a robotic arm capable of motion toward the sample set, DO probes releasibly attached to the robotic arm, and a programmable computer interfaced with the robotic arm and controlling the robotic arm. To measure the DO of test samples within the test sample containers, DO probes (which are connected to respective DO meters) are positioned adjacent a set of test sample containers and inserted within, the DO meters determine the DO within the test sample containers, the DO values are recorded by use of a programmable computer, and the DO probes are then removed from the set of test sample containers. The BOD may then be calculated by sealing the set of test sample containers, incubating the set of test sample containers for a predetermined time period, removing the seals on the set of test sample containers, and repeating the DO measurement to obtain a final DO. The BOD values of the test samples may then be calculated using the initial and final DO values.

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