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5、汞齐有分两次加入的时候。例如使用镉汞齐定量钨时,起先镉汞齐的消耗量特别显著。为了使汞齐的消耗量减轻,而还元反应仍能充分进行起见,可先加入少量汞齐,使其在比较低酸度中反应,然后再将所需之酸量补足,使反应完全。6、还元溶液中因其他物质的影响而生成沉淀,必须在 CO_2气体中滤过时,可取一有活塞的玻质导管,一端用胶管连接于还元器下部,他端以一胶皮塞与磁制滤过坩埚连结,导
5, amalgam when there are two points to join. For example, the use of cadmium amalgam to quantify tungsten, the initial consumption of cadmium amalgam is particularly significant. In order to reduce the consumption of amalgam, but the reaction is still fully met yuan, a small amount of amalgam can be added to make it react in a relatively low acidity, and then make up the required amount of acid, so that the reaction is complete. 6, also yuan solution due to the impact of other substances and the formation of precipitation, must be filtered in CO 2 gas, it is desirable to have a piston of the glass catheter, one end of the hose connected to the lower part of the device, he end with a plastic plug and magnetic System filtration through the crucible, guide