チオシアン酸水銀(II)法による岩石中の塩素定量法の改良とDodoman系岩石中の塩素の定量

概要

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The improved analytical method of chloride in rocks with mercury (II) thiocyanate has been studied. The effect of coexisting salts from the flux on the photometric determination of total chloride has been hitherto neglected, but in practice it is significant in high chloride concentration range. By reason of the effect the calibration curve has to be prepared by use of the same amounts of salts as these from the flux. The linearity of the calibration curve is improved by adding much more amounts of mercury (II) thiocyanate than that in the conventional method. The milky turbidity, which disturbs the determination of water soluble chloride in some rocks, can be removed by use of a membrane filter. The analytical results of chloride in East African Dodoman rocks formed probably about three billion years ago are also given.
山梨大学の論文