1953 年 4 巻 2 号 p. 90-92
The present, author prop o sed a new procedure of chlorinitydetermination of sea water. In this method, it is required to take only 1.5 ml of sea water which is one tenth of the quantity of sample in the standard method. Consequently, the quantity of silver nitrate solution also can be reduced to one tenth. A pipette and a burette are made specially and used in this micro-method. The graduation of the burette is the same as in the Knudsen's burette, which enables us to read the chlorinity directly. The author used a mixed solution of uranin and starch as an indicator. The mean deviation of this method is about 0.01 %. Another merit of the method is to save much time, within the allowable limit of accuracy.