TOTAL ORGANIC CARBON ANALYZER

A total organic carbon analyzer (1) including a combustion unit (21) configured to combust a liquid sample in the presence of a heated oxidation catalyst (212), a liquid supply unit (10) configured to switch between a measurement target liquid sample and pure water to supply to the combustion unit (21), and a carbon dioxide amount measurement unit (24) configured to measure an amount of carbon dioxide generated in the combustion unit (21), the total organic carbon analyzer (1) further comprising:a start operation reception unit (31) configured to receive a predetermined start operation by a user;a device activation processing unit (32) configured to execute activation processing of activating the combustion unit (21) and the carbon dioxide amount measurement unit (24) when the start operation reception unit (31) receives a start operation; anda blank measurement execution unit (33) configured to, after a predetermined time elapses from the start of the startup process or after it is detected that the combustion unit (21) reaches a predetermined temperature and the carbon dioxide amount measurement unit (24) is in a stable state, start a pure water measurement operation of supplying the pure water from the liquid supply unit (10) to the combustion unit (21) and measuring the amount of carbon dioxide in the carbon dioxide amount measurement unit (24), and perform control of repeatedly executing the pure water measurement operation until measured values of the amount of carbon dioxide in a latest predetermined multiple rounds fall within a predetermined range.