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配制合金铝时,加入精炼剂和变质剂,这些成份中通常含有氯离子(氯化钠和氯化钾)。虽然在高温下不会参予金属反应,但是合金中的镁,有可能与之生成镁的氯化物形式存在。氯化银浊度法测氯离子是简便的方法。但如何保持沉淀的颗粒大小前后一致,是测定成败的关键。本文针对这问题作了浓度比例,保护胶体,硝酸银用量,硝酸根浓度及放置时间等试验。并将分析结果作了数理统计处理。一试验方法取一定量氯标准液(0～100微克)于25毫升量瓶
In the preparation of aluminum alloy, adding refining agents and modifiers, these ingredients usually contain chloride (sodium chloride and potassium chloride). Although at high temperatures will not participate in the metal reaction, but the alloy of magnesium, magnesium and magnesium may be generated in the form of chloride. Chloride chloride turbidity method is a simple method. But how to keep the pellet size consistent is the key to success. This paper made a concentration ratio for this issue, the protective colloid, the amount of silver nitrate, nitrate concentration and placing time and other tests. The results of the analysis were processed by mathematical statistics. A test method to take a certain amount of chlorine standard solution (0 to 100 micrograms) in 25 ml volumetric flask