CONTINUOUS GAS EXTRACTOR AND CONTINUOUS ANALYZER FOR ANALYZING FREE CARBONIC ACID AND DISSOLVED INORGANIC CARBONIC ACID IN WATER USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a continuous gas extractor for continuously and instantaneously extracting all amount of gas dissolved in water and a continuous analyzer for analyzing free carbonic acid and dissolved carbonic acid in water using the gas extractor. SOLUTION: This continuous analyzer for analyzing dissolved carbonic acid in sample water is constituted of a mixing vessel 32 for mixing 0.3-10 ml/min sample water with 50-1,000 ml/min air, an extraction tube 33 which is connected to the mixing vessel and helically formed from a reaction tube made of Teflon (registered trade mark) having a 0.5-10 mm inside diameter and a >=0.5 m length and a separator 34 connected to the extraction tube 33. And a continuous gas extractor 31 for instantaneously extracting all amount of gas dissolved in sample water during discharge air, a continuous analyzer for analyzing free carbonic acid in sample water, supplying a specific amount within a range of sample water and air not containing carbon dioxide to the mixing vessel 32 and leading the exhaust air of the separator 34 through a dehumidifying device 41 to an infrared ray CO2 analyzer, and a pretreatment section adding a certain amount of acid to the sample water so as to control the pH of the sample water to 3 or less are provided.