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用重量测定方法测定含铝在99.5%以上的纯铝,其主要缺点是操作繁复,花费时间,而且由煆烧而成的白色氧化铝又极易吸收空气中的水分,所以分析所得的结果就不能十分准确,往往有超过100%的现象。此外煆烧氧化铝需要1400℃的高温,一般条件较差的化验室使用酒精喷灯,是不能满足这个要求的,因此对於测定含量在99.5%以上的纯铝常感困难。采用容量测定方法就可以避免上述方法的缺点。我们采用了一个又简单、又迅速、又准确的容量测定方法来测定纯铝的含量,结果非常满意。我们曾经作过许多次测定,准确性很高,每次均不超
The main disadvantage of the determination of pure aluminum containing more than 99.5% aluminum by the gravimetric method is that the operation is complicated and time-consuming, and the white alumina made from the burnt oxide can easily absorb the moisture in the air. Therefore, the analysis results Can not be very accurate, often more than 100% of the phenomenon. In addition, burning alumina requires 1400 ℃ high temperature, poor general laboratory alcohol burner, can not meet this requirement, so for the determination of content of more than 99.5% pure aluminum often feel difficult. The use of capacity measurement method can avoid the shortcomings of the above method. We adopted a simple, rapid and accurate volumetric determination of the content of pure aluminum, the results are very satisfactory. We have done many measurements, the accuracy is high, each time not super