PURPOSE: A method for measuring water concentration in ammonia is provided to perform analysis of water in a low concentration range of 10 ppm or less in ammonia gas and liquefied ammonia in a simple and convenient manner. CONSTITUTION: A method and apparatus for measuring a water concentration in ammonia, comprises using ammonia having a water concentration of 10 ppm or less as a reference gas, introducing the ammonia at a constant flow rate into a multi-reflection long optical path gas cell, and measuring infrared absorption intensity of water on at least one measurement wave number in the range of from 3,500 to 4,000 cm-1, from 2,600 to 3,100 cm-1, or from 1,900 to 2,400 cm-1 at which infrared absorptions of ammonia and water do not overlap.
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机译：目的：提供一种用于测量氨中水浓度的方法，以简便的方式对氨气和液化氨中10ppm或以下的低浓度范围的水进行分析。构成：一种用于测量氨中水浓度的方法和设备，包括使用水浓度为10 ppm或更低的氨作为参考气体，以恒定的流量将氨引入多反射长光程气室，在至少一个测量波数上测量水的红外吸收强度，该测量波数在3,500至4,000 cm -1，2,600至3,100 cm -1或1,900至2,400 cm -1的范围内氨和水的红外吸收不重叠。
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