Method and apparatus for measuring dissolved organic carbon in water

摘要

Apparatus and method for measuring dissolved organic carbon in water utilize an oxidation chamber wherein the dissolved organic carbon is ionized, and a separate measuring chamber, and an oxygen-containing gas is pumped between the two chambers. The process water to be measured is used as both the reference water and sample. The apparatus comprises an oxidation chamber (10) having an an ultraviolet lamp (46) disposed within the interior of said oxidation chamber for irradiating dissolved organic carbon present in said water sample thereby producing carbon dioxide; a measuring chamber (16); means (12) for intro­ducing said sample water into said oxidation chamber and said measuring chamber; a gas transmission loop (18) connecting said oxidation chamber with said measuring chamber; means (26, 34) for taking at least a portion of the carbon dioxide produced in said oxidation chamber from said oxidation chamber through said gas transmission loop to said measuring chamber; and means for measuring the amount of carbon dioxide in said measuring chamber, said amount of carbon dioxide being representative of the amount of organic carbon introduced into said apparatus.