Description
Introduction：
It is a glass instrument used to measure liquids. A graduated cylinder is an instrument that measures the volume of a liquid. Specifications are expressed in terms of the maximum capacity (mL) of all measurements, commonly used are 10 mL, 25 mL, 50 mL, 100 mL, 250 mL, 500 mL, 1000 mL, etc. The scales on the outer wall are all in mL, each cell of a 10 mL graduated cylinder represents 0.2 mL, and each cell of a 50 mL graduated cylinder represents 1 mL. It can be seen that the larger the measuring cylinder and the thicker the pipe diameter, the smaller the accuracy, and the greater the reading error caused by the deviation of the sight line.
Feature:
1. Color：Clear glass
2. Material: Boro3.3 glass
3. Bottom：Free standing bottom
4. Packing:144pcs/ctn
5. Application:It is used for laboratory.
Using:
1.general use
There are also graduated pipettes, pipettes and droppers used to measure the volume of liquids, both of which are more accurate than graduated cylinders. However, a pipette can only measure a fixed amount of solution at a time, and a graduated pipette can measure the required scale amount, while a dropper is more complicated to use and has relatively poor accuracy. It is generally used for rough pipetting, such as color developer. , buffer, etc.
2.Special Purpose
①Measure the volume of solid: first take a certain amount of water in the measuring cylinder, and record the initial reading, then add solid material to the measuring cylinder, and then record the final reading, the difference in volume is the volume of the solid.
②Measure the volume of the gas: the volume of the liquid entering the measuring cylinder is approximately the volume of the generated gas..
Pay attention:
1. Cannot be used as a reaction vessel
2. Can not be heated
After we wash things, we like to put them in the oven to dry, but the measuring cylinder is a glassware, and heating will deform it, which will affect its accuracy. Especially repeated long-term heating, high temperature heating.
3. Can not dilute concentrated acid and concentrated alkali
Especially corrosive liquids. In addition, although glass is an inert material, it is not without activity. Certain strong acids and bases, especially strong bases, can still corrode it. Therefore, long-term storage or long-term use of graduated cylinders is also inaccurate.
4. Can not store medicine
A graduated cylinder is a measuring device, not a container, and is not suitable for storing liquids.
5. Can not take heat solution
Inaccurate if measuring hot or cold liquids.
