DEVELOPMENT OF THE SYSTEM FOR ACCURATE MEASUREMENT OF CARBON DIOXIDE DISSOLVED IN SEA AND STUDY ON THE CLARIFICATION OF SPECIES OF DISSOLVED CARBON DIOXIDE

本课题研制了一种新的精确测量海水中溶解的二氧化碳（CO_2）和空气中存在的二氧化碳的仪器，用于分析各种溶解的二氧化碳，确定海洋和空气中CO_2的分布平衡。结果总结如下：1。高效气体扩散装置的研制。一种管状微孔聚四氟乙烯膜用于气体CO_2的分离，该膜安装在气体扩散装置中，不需要任何胶水。高灵敏度CO_2检测系统的研制。用不同的酸性染料对CO_2的显色反应进行了研究，发现甲酚红的显色效果最好。此外，还合成了几种新型染料，并对其进行了现场检测。在所合成的试剂中，4-（2,4-二硝基苯基偶氮）-1-萘酚-5-磺酸效果最好。该系统与新开发的试剂一起用于便携式fia。无二氧化碳水制备系统的研制。该系统由离子交换柱和泵组成，采用不含CO_2的纯净水对水中总二氧化碳进行灵敏测定。总CO_2测定系统的研制。该系统由双柱塞泵、六路进样器、反应线圈、检测器和本研究新研制的气体扩散装置组成。进一步，开发了一种单盒便携式FIA系统；该系统使用12V电池，数据存储在存储卡或笔记型个人电脑中。利用该系统可实现海洋和空气中CO_2的现场分析。海洋和空气中二氧化碳分布平衡的研究。利用便携式FIA可在现场快速达到平衡，并利用总浓度和平衡常数对溶解的CO_2进行了分析。少

In this project, a new apparatus for accurate measurement of carbon dioxide (CO_2) dissolved in sea water, as well as CO_2 present in air, was developed to analyze various species of dissolved carbon dioxide and to determine the distribution equilibrium of CO_2 between sea and air. The results are summarized as follows.1. Development of high-efficiency gas diffusion unit. A tubular microporous PTFE membrane was found to be very useful for the separation of gaseous CO_2, and was installed in the gas diffusion apparatus without any glue.2. Development of highly sensitive detection system for CO_2. The coloration reaction for the sensitive detection of CO_2 was investigated by using various kinds of acidic dyes : Cresol Red was found to be the best. Furthermore, new kinds of dyes were synthesized and examined for the on-site measurement. Of the reagents synthesized, 4- (2,4-dinitrophenylazo) -1-naphthol-5-sulfonic acid was the best of all. This system with the newly developed reagent was … More used for the portable FIA.3. Development of the system for the preparation of non-carbon-dioxide water. The system was assembled with ion exchange columns and a pump, and the purified water without CO_2 was used for the sensitive determination of total carbon dioxide in water.4. Development of systems for the determination of total CO_2. The system was assembled using a double-plunger pump, a six-way injector, a reaction coil, a detector and the gas-diffusion apparatus newly developed in this study. Further, a one-box portable FIA system was developed ; the system worked with a 12V battery, and the data was stored in memory cards or a note-type personal computer. By using this system, on-site analysis of CO_2 in sea and air could be achieved.5. Study on the distribution equilibrium of carbon dioxide between sea and air. The equilibrium could be achieved rapidly on site with the portable FIA,and each species of dissolved CO_2 was analyzed using the total concentration and the equilibrium constants. Less