Introduction to measuring cylinder

A measuring cylinder is a measuring device used in the laboratory. It is mainly made of glass, and a few (especially large ones) are made of transparent plastic. The purpose is to quantitatively measure liquids by volume. One of the measuring instruments used to measure a certain volume of liquid. Graduating cylinders generally have low accuracy. It cannot be used as a reactor, it must not be heated, and it cannot be used to prepare solutions or dilute solutions. [1]
It is a vertical cylindrical shape with a mouth on one side of the upper edge for easy pouring. There are wide feet on the lower part for stability. The volumetric range is engraved on the cylinder wall for the user to read the volume. The maximum measured volume ranges from a few milliliters to several liters. The cylinder wall is printed with scales from bottom to top. When observing the reading, the experimenter should pay attention to the fact that the line of sight needs to be level with the lowest point of the concave liquid surface (or the highest point of the convex liquid surface) of the liquid.
effect
general purpose
Containers used to measure liquid volume include graduated pipettes, pipettes and droppers, the first two of which are more accurate than measuring cylinders. However, a pipette can only take a fixed amount of solution at a time. A graduated pipette can measure the required amount. A dropper is more cumbersome to use and has poor accuracy. It is generally used for rough pipetting, such as chromogenic reagents. , buffer, etc.
Special Purpose
1. Measure the volume of the solid: First, take a certain amount of water in the measuring cylinder and record the initial reading, then add solid matter to the measuring cylinder, and then record the final reading. The volume difference is the volume of the solid. 2. Measure the gas volume: The volume of liquid entering the graduated cylinder is approximately the volume of gas generated.
Graduating cylinder specifications
Generally there are 5mL, 10mL, 25mL, 50mL, 100mL, 250mL, 500mL, 1000mL and other specifications.