在实验工作里,水银的用途很多。为某些特殊用途,需用非常純潔的水銀。在一系列的化学清潔处理之後,一般是將水銀放在真空里蒸餾幾次。一般蒸餾水銀的設备都需要隨時用手調節水銀面的高度。工作量虽少,但却要牵制住一个人。为多次蒸餾就要将一次蒸餾过的水銀注入第二套里去。若只有一套设备,則必須將一批水銀蒸餾一次以後,用已蒸餾过的水銀续入,代替未蒸餾过的水銀。最初的二次蒸餾出来的水銀,因为混有一次蒸餾的,必須再蒸餾一次。同样,二次蒸餾完备後,蒸餾第三次時,仍然要將最初的一部份重蒸。如此对時間和电的損失都很大。最嚴重的是:水銀可以使人慢性中毒。除了採取措施保障工作人員 In experimental work, mercury has many uses. For some special purposes, use very pure mercury. After a series of chemical cleaning processes, mercury is typically distilled in a vacuum several times. General equipment for the distillation of mercury need to manually adjust the height of the mercury surface. Although the workload is small, but it must contain a person. For multiple distillation will be a distillation of mercury into the second set to go. If there is only one set of equipment, then a batch of mercury must be distilled once, with distilled mercury added to replace the undistilled mercury. The first secondary distillation of mercury, because mixed with a distillation, must be distilled again. Similarly, the second distillation is complete, the third distillation, still have to re-steamed the first part. So the loss of time and electricity are great. The most serious is: mercury can make people chronic poisoning. Except to take measures to protect the staff