text: The second stage is the oxidation of the carbon in the remaining sample in the form of carbon dioxide (CO) and other gases. Modern TOC analyzers perform this oxidation step by several processes:
  * High temperature combustion
  * High temperature catalytic oxidation (HTCO)
  * Photo-oxidation alone
  * Thermo-chemical oxidation
  * Photo-chemical oxidation
  * Electrolytic oxidation