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海绵钛中镁的测定,原采用达旦黄比色法。不但操作繁琐费时,还需用氰化钾掩蔽铜镍的影响。改用原子吸收法后,试样用氢氟酸溶解,饱和硼酸络合氟离子,在不分离基体钛的条件下直接测定海绵钛中镁。钛和共存元素的干拢用硝酸锶消除。硼酸、氢氟酸不影响镁的测定。方法灵敏度高,操作简便快速,回收率在94%以上。本法与用法测定的结果一致。
Determination of sponge titanium in magnesium, the original use of daddy yellow colorimetry. Not only cumbersome and time-consuming operation, but also need to use potassium cyanide masking the impact of copper and nickel. After changing to atomic absorption method, the sample is dissolved in hydrofluoric acid and the boric acid is saturated with boric acid to directly measure the magnesium in the sponge titanium without separating the base titanium. Titanium and coexisting elements of dry stripping with strontium nitrate. Boric acid, hydrofluoric acid does not affect the determination of magnesium. The method has the advantages of high sensitivity, simple and rapid operation, and the recovery rate is over 94%. This method is consistent with the result of usage.