3. Precautions when using test tube racks:

3. Precautions when using test tube racks:-MasterLi, Xitoy zavodi, etkazib beruvchi, ishlab chiqaruvchi

Precautions when using test tube racks

1. Do not place objects heated to red-hot on the test tube rack – to avoid burning it.

2. Place the rinsed tube upside down on a tube rack to drain the water from the tube as soon as possible.

3. Keep the tube rack clean to prevent contamination of the rinsed tube.