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在化学分析工作中,时常遇到沉淀附着在器皿上,唯一的方法就是用淀帚将它扫下来,淀帚上的沉淀由洗瓶吹到滤纸上,再等它滤完。这样的手续要费十分钟,而且有时淀帚的橡皮破裂了,将沉淀夹在缝中,以至结果不正确。现在有个改良的方法,只须一分钟就能完成,而且没有夹住沉淀的危险。沉淀洗净后,从漏斗上取下,将滤纸上不
In the chemical analysis work, often encounter the sediment attached to the vessel, the only way is to use a broom to sweep it down, sediment on the broomstick blowing bottle onto the filter paper, and then wait it filtered. It takes ten minutes for such a procedure to take place, and sometimes the rubber of the broomstick ruptures and the sediment is caught in the seams so that the result is not correct. There is an improved method, which can be accomplished in just a minute, without the danger of pinching the sediment. After the precipitate is washed, remove it from the funnel, and leave it on the filter paper