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在南方不少高山地区,作化探普查时,次生晕效率低,分散流条件不理想,应该说水化学方法更有效,但至今尚缺适于现场分析的方法。为使离子选择电极法运用于野外水化学现场分析,我们试制了一种适于流动体系的带有测量池和外盐桥的复合氟电极装置。实践证明,本装置可代替氟电极法测定中的氟离子选择电极、测量池、电磁搅拌器和琼脂盐桥所组成的测试系统。本装置消耗试液少,没有死角,易于清洗,盐桥接液点与指示电极保持固定的距离减小了参比电极的流动液界电位。本装置配以DD-2型电极电位仪
In many mountainous areas in the south, for the purpose of geochemical survey, the secondary halo efficiency is low and the conditions of dispersed flow are not ideal. It should be said that the water chemistry method is more effective. However, there is still no suitable method for on-site analysis. In order to make use of the ion-selective electrode method in the on-site field chemical analysis of water chemistry, we developed a composite fluorine electrode device with a measuring cell and an external salt bridge for the flow system. Practice has proved that the device can replace the fluorine electrode method to determine the fluoride ion selective electrode, measuring cell, electromagnetic stirrer and agar salt bridge composed of the test system. The device consumes less test solution, has no dead ends and is easy to clean. The distance between the salt bridge contact point and the indicator electrode keeps the liquid potential of the reference electrode reduced. This device is equipped with DD-2 electrode potentiometer