Used in laboratory, according to varying sizes, long, hollow, cylindrical, ordinary or special glass material, tube.
Test tubes: Long, hollow, cylindrical glass materials in which chemical reactions are carried out or solutions are placed. The fire resistant ones are made of pyrex glass.
Centrifuge tubes: are used for separating the different phases in the mixture, are made of pressure-resistant glass, conical, cylindrical, graded and with or without cap.
what is a test tube used for
In heating or boiling tests, the tube should never be filled more than ¼. Because the liquid may overflow during boiling. Using a wooden tong to warm up is the most convenient way. If there is no tongs near the mouth of the tube, the thumb is on the top and the middle finger is at the bottom.
should be kept at an angle. In tube heating tests, the mouth of the tube should not be directed towards the person or someone else. Accidentally overflowing or gushing fluids can be harmful. The flame should be kept close to the tops of the liquid as the tube can easily leap out when heated from the bottom. In order to prevent the tube from cracking during heating, it should be gently rocked or rotated continuously like fingers between the fingers.