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本文研究了用苯萃取TTA-甲基蓝-镁的络合物以比色测定微量镁的方法。TTA-甲基蓝-镁络合物的最大吸收峰在670毫微米,试剂的吸收峰在500毫微米。显色时合适的pH范围为10.1—11.4。在10毫升苯中含有0—6微克镁服从比尔定律。在酒石酸钾、EGTA、亚铁氰化钾等掩蔽剂存在下。一般常见的干扰元素可允许存在15倍以上不干扰测定。可直接应用于四氯化(?)中0.001％以上镁的测定。方法具有简便、快速的优点。
In this paper, the method of benzene extraction TTA-methyl blue-magnesium complexes for the determination of trace magnesium colorimetric method. The maximum absorption peak of TTA-methyl blue-magnesium complex is 670 nm, and the absorption peak of the reagent is 500 nm. The suitable pH range for color development is 10.1-11.4. Beer’s law is obeyed with 0-6 micrograms of magnesium in 10 milliliters of benzene. In the presence of potassium tartrate, EGTA, potassium ferrocyanide and other masking agents. Common common interference elements can be allowed to exist more than 15 times does not interfere with the determination. It can be directly applied to the determination of more than 0.001% magnesium in tetrachloride (?). The method has the advantages of simplicity and speed.