ホウ素の分析化学的研究(第5報) : 濾紙を用いるホウ素の超微量検出法
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概要
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For detection of boron by spot test on filter paper, a paraffin ring is placed on the lifter paper for preventing the dispersion of the solution through the filter paper and for increasing the concentration of sample in unit area on the paper. The minimum limit of detection of boron by this method was 0.02γ in a solution containing boron only and the accuracy was increased 10 times more than those estimated without using the ring. This method seems to have a possibility to be applied on spot test other than boron. In boron test, oxalic and salicylic acids were the most effective in accelerating the color development of curcumin, in which oxalic acid made possible to detect 0.002γ boron (1:10, 000, 000).