1) The holding method is to clamp the glass part with the middle finger and ring finger to keep it stable, and squeeze the rubber tip with the thumb and index finger to control the inhalation or dripping of the reagent.
2) When adding liquid, the glue-tip dropper should not extend into the container or touch the container. Should be suspended vertically 0.5cm above the container.
3) It cannot be placed upside down or placed flat on the desktop. Should be inserted into a clean bottle or test tube.
4) After use, wash it off with water immediately. It is strictly prohibited to absorb another reagent without washing. The dropper on the dropper bottle does not need to be cleaned.
5) The rubber cap and the glass dropper should be tightly integrated and airtight. If the rubber cap is aging, replace it in time.
6) When dripping toxic or corrosive liquid into the test tube from the plastic dropper, the tip of the dropper is allowed to touch the inner wall of the test tube.
7) The rubber tip dropper is often used in conjunction with the graduated cylinder.
8) If the dropper is equipped with a dropper, this dropper is dedicated to the dropper and cannot suck other liquids. Do not cross-use or rinse with water.