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实验表明,γ-Fe_2O_3酸法品种磁粉中的SO_4~(2-)含量,可以用热水浸洗磁粉中的SO_3,生成H_2SO_4,再用比浊法测出。方法快速、简便、适用,结果令人满意。
The experiment shows that SO_4 ~ (2-) content in the magnetic powder of γ-Fe_2O_3 acid can be soaked in hot water to generate H_2SO_4 and then turbidimetrically measured. The method is fast, easy and suitable, the result is satisfying.