| 摘要 |
PURPOSE:To measure continuously hydrogen sulfide with high accuracy with respect to the gas obtd. by briging an aq. soln. of hydrogen sulfide into contact with air, gaseous nitogen or carbon dioxide. CONSTITUTION:A required amt. of acid is added to the sample supplied from a metering pump 1 and thereafter the sample enters a diffuser S where the sample contacts with the air or gaseous nitrogen supplied at a specified rate to form the diffusion gas contg. hydrogen sulfide. Temp. controllers 5, 6 control the diffusion temp. and a condenser 7 condenses the moisture in the diffusion gas. The gas emitted from the condenser 7 enters a hydrogen sulfide detector D where the hydrogen sulfide is detected. The measured value having good accuracy is thus obtd. by the simple operation from the aq. soln. of low concn. contg. the hydrogen sulfide in the form of single substance, hydrosulfide ion or sulfide ion. |
