The shape, purpose and usage of watch glass
【Shaping】A circular glass dish with rounded edges and chamfered edges.[ Lab Watch Glass,Watch Glass Lab,45mm Watch Glass,Watch Glass All Sizes,Watch Glass All Sizes Suppliers ]
【Usage】Wash and dry the watch glass before use. The watch glass has a wide range of uses, but no matter what kind of instrument it is used instead, it must be used in accordance with the method of use of various instruments. For example, for gas cell identification, attach two watch glasses to the surface glass with a test paper soaked in a reagent using a flat synthetic gas chamber that has been ground, and place the identified compound on the lower one. On the watch glass, heat up if necessary, observe the gas generated in the reaction, and identify the gas from the color change of the reagent. For example, when observing white sediment or turbidity, put a piece of black paper on the bottom wall of the watch glass, and the white product can be clearly seen. If you make various instrument covers, just use its arc shape to put it on the mouth of the instrument and put it firmly, but you should pay attention to choosing the watch glass according to the caliber of the instrument. Generally, the diameter of the watch glass should be 1cm larger than the diameter of the instrument, so it is more convenient to use. If you make a beaker lid, choose watch glasses of different diameters according to the capacity of the beaker.
[Use] It is produced with hard glass, suitable for quantitative analysis in laboratories. For example, in biochemical analysis, two watch glasses are used to synthesize a culture chamber for suspension drop culture experiments. Observe the white precipitation, trace dissolution, evaporation, etc. in the gas chamber reaction.
The watch glass can be used as the cover of the beaker, evaporating dish, crystallization dish, funnel and other instruments to prevent dust from falling in and keep the material pure during operation. During sublimation operation, it is used to prevent the alienation of the material, so that the alienated material stays at the bottom of the watch glass. When weighing corrosive substances, it can replace the weighing pan of the balance.[ Lab Watch Glass,Watch Glass Lab,45mm Watch Glass,Watch Glass All Sizes,Watch Glass All Sizes Suppliers ]
Post time: Nov-16-2021
