Patent ID: 6623974
Filing Date: 2003-09-23
Classification: B01J,C02F,G01N,Y10T

Abstract:
A total organic carbon analysis method for a liquid carrying a suspension of organic matter utilizing ozone and hydroxyl radicals in an analyser including a reactor vessel and a plurality of fluid inlet and outlet valves comprising;introducing beads of an inert material into the reactor vessel; sampling the liquid; delivering the sample to the reactor vessel; adding an acid to lower the pH of the liquid; stripping off inorganic carbon as carbon dioxide and measuring carbon dioxide to give a value for total inorganic carbon present; adding a base liquid having hydroxyl ions to increase the pH of the liquid; adding ozone through a reactor inlet to form hydroxyl radicals and oxidize organic material in the liquid to carbon dioxide; cutting off the ozone; lowering the pH of the sample; stripping off carbon dioxide and measuring carbon dioxide to give a value of total organic carbon present; and periodically introducing a metallic catalyst into the reactor vessel to coat the beads.