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一、前言微量锑的测定,以往采用碘化钾法,罗丹明B法,甲基紫法,结晶紫法其中碘化钾法的灵敏度较差,罗丹明B法则干扰元素较多,近年来一些资料上介绍了利用孔雀绿作显色剂的方法,其效果均较前几种方法为佳,我们在试验后也发现以孔雀绿法测定锑不但再现性好,灵敏度高,干扰的元素较少,且可在不分离铁的情况下测定锑,因此我们将耐磨铸铁中锑的测定改用不分离直接比色的方法,且对锑在显色前氧化与还原的条件进行了一些试验,并到出了一些结论,其试验如后:
Preface The determination of trace antimony, the past, the use of potassium iodide method, rhodamine B method, methyl violet method, crystal violet method which potassium iodide method of sensitivity is poor, Rhodamine B law interfere with more elements in recent years, some information on the introduction The use of malachite green as a developer method, the effect is better than the previous methods are better, we also found after the test to determine the antimony with malachite green not only reproducible, high sensitivity, less interference elements, and can be Antimony is measured without separation of iron. Therefore, we changed the determination of antimony in wear-resistant cast iron to the method of non-separation and direct colorimetric, and carried out some tests on the conditions of oxidation and reduction of antimony before color development. Some conclusions, the test as follows: