Welcome To Huida

What should we pay attention to when using the measuring cylinder?

1. How to fill the measuring cylinder?

When filling the measuring cylinder pyrex borosilicate, hold the cylinder with your left hand to tilt it slightly, and hold the reagent bottle with your right hand to tilt the cylinder

The mouth of the bottle is close to the mouth of the measuring cylinder to allow the liquid to flow in slowly. When the amount of injection is slightly less than the required amount, put the measuring cylinder flat and use the dropper to drop to the required amount.

2. Which side should the scale of the measuring cylinder be on?

There is no “0″ scale on the measuring cylinder. Generally, the starting scale is 1/10 of the total volume. The scale needs to face people.

3. When do you read the volume of the liquid taken?

After the liquid is injected, wait for 1 to 2 minutes for the liquid to flow off the inner wall and then read the scale value. Otherwise, the reading value is too small.

4. How to read the volume of the liquid taken?

The measuring cylinder should be placed on a flat table. When observing the scale, the line of sight should be kept level with the lowest concave liquid level of the liquid in the measuring cylinder, and then the volume of the liquid taken should be read out.

5. Can the measuring cylinder be used to heat or measure superheated liquid?

Heating temperature rises, the measuring cylinder thermal expansion, volume will increase. It can be seen that the cylinder cannot be heated, nor can chemical reactions or solutions be prepared in the cylinder.

6. Do I flush the measuring cylinder with water after pouring out the liquid?

It depends on the circumstances. It is not necessary to flush the cylinder with water if the measurement is only to be accurate, as the cylinder was manufactured with the residual liquid in mind. On the contrary, if the flushing will make the volume of the larger. If you want to use the same cylinder to measure other liquids, it must be rinsed with water, to prevent contamination of impurities.

7. The problem of looking up and looking down on the cylinder

In looking at the volume of the cylinder, we look at the center point of the water surface

When looking down from the top, the point of intersection between the line of sight and the cylinder wall is on the water surface, so the reading data is too high. When looking up, the point of intersection between the line of sight and the cylinder wall is under the water surface, so the reading data is too low, so the actual measurement is too high

8. The reason why the measuring cylinder cannot be heated directly and the chemical reaction cannot be carried out in the measuring cylinder and the solution can not be configured in the measuring cylinder

A. The measuring cylinder volume is too small

B. Do not dilute or prepare solutions in the measuring cylinder, and never heat the measuring cylinder.

C. Nor in the lab equipment measuring cylinder note: for chemical reaction when the volume of the liquid, according to the volume of the measure to choose appropriate to the size of the measuring cylinder with flat bottom (otherwise it will cause greater error), smooth reading when measuring cylinder should be vertical on the desktop, and the scale of the measuring cylinder and fluid concave on the surface of the liquid in the cylinder low keep in the same horizontal plane.

D. The reaction may produce heat

Note: in general, the cylinder measuring diameter is fine, the better, because the accuracy is higher!

Huida has many years of experience in the production and processing of measuring cylinder. The product line is rich and can meet the vast majority of measuring cylinder experimental applications. Come and choose the right products for your experimental applications.