Analytical system for analyzing CO2 content of a fluid

摘要

A total carbon dioxide analyzer system has a reaction chamber that includes a tube and a piston mounted for sliding movement in the tube to change the volume of the chamber. A valve coupled to the chamber has a sample inlet port and a reagent inlet port, and is movable between a first state in which the sample inlet port is connected to the chamber, a second state in which the reagent inlet port is connected to the chamber, and a third state in which the reaction chamber is sealed. A system controller coordinately operates the valve and moves the piston to increase the volume of said chamber to draw sample into the chamber for mixing with an acid reagent in the chamber, and then seals the chamber and increases the volume of the chamber to facilitate the release of carbon dioxide. A transducer then senses the pressure of carbon dioxide in the reaction chamber.