How to open a dropper bottle

When dripping, the dropper should be kept perpendicular to the top of the container, avoid tilting, do not stand upside down, do not extend into the container, and do not touch the wall of the container. In addition to sucking the solution, the tip of the tube should not touch other utensils to avoid contamination by impurities. It cannot be used for two purposes.

Ordinary droppers need to be cleaned when they are used up, but special droppers cannot be cleaned, they need to be used for special tubes, and they can be put back into the original reagent bottle after use.

When using, don't just use your thumb and index finger to pinch, use your middle finger and ring finger to pinch.

1. When using the dropper, pinch the rubber nipple with your fingers to drive out the air in the dropper, then insert the dropper into the reagent bottle, release your finger, and the reagent will be inhaled.

2. After taking the liquid, the dropper should keep the rubber head above, do not lay it flat or upside down, to prevent the solution from flowing back and corroding the rubber head.

3. When adding liquid dropwise, it should be suspended above the beaker, and do not touch the wall of the beaker, so as not to contaminate the dropper or cause contamination of the reagents.

4. Do not put the dropper on the test bench or other places to avoid contamination of the dropper.

5. The used dropper should be rinsed with clean water immediately for reuse.