Method and apparatus for conducting flow analysis

Details Method and apparatus for conducting flow analysis Method and apparatus for conducting flow analysis

1983-06-29

1987-07-14

Marcus, Michael S.

Chemistry: analytical and immunological testing

Automated chemical analysis

With a continuously flowing sample or carrier stream

204403, 204409, 422 68, 422 81, 422103, 436151, 436 74, 436 79, G01N 3508, G01N 2740

Patent

active

046802703

ABSTRACT:
A single sampling tube is inserted into a whole blood sample contained in a sample cup, and the blood introduced into a switch-valve and a first channel without being diluted. The switch-valve has a volumetric section. In the first channel are arranged a plurality of ion-sensing electrodes, and downstream from these electrodes, a sample position sensor. The blood is led up to where the sample position sensor is located, at which point it fills the volumetric section and the ion sensing electrode channels. The sample Na.sup.+, K.sup.+, Cl.sup.-, and Ca.sup.++ are detected in this state. After the switch-valve switches, the flow within the volumetric section is forced towards a photometer positioned in a second channel by a reagent solution. The blood is diluted while passing through a reaction coil, during which time enzymes in the blood give rise to enzyme reactions with the reagents. The absorbance of the reaction solution is measured by the photometer.

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