The Use And Precautions Of The Dropper

The dropper is a technological product, which is divided into a fat belly dropper and a common dropper, which is composed of a rubber nipple and a pointed glass tube.
It is divided into fat belly dropper and common dropper. It consists of a rubber nipple and a pointed glass tube. Aspirate or add a small amount of reagent, and aspirate the supernatant to separate the precipitate.
When adding drops, the dropper should be kept vertically above the container, avoid tilting, avoid standing upside down, not extending into the container, and not touching the container wall. In addition to drawing the solution, the tip of the tube should not touch other utensils to avoid contamination by impurities. You can't use one pipe for two purposes.
Ordinary droppers need to be cleaned after use, but special droppers cannot be cleaned, and special tubes are required. Just put them back into the original reagent bottle after use.
When using it, don't just pinch it with your thumb and index finger, but pinch it with your middle finger and ring finger.
1. When using the dropper, pinch the rubber nipple tightly with your fingers to drive out the air in the dropper, then put the dropper into the reagent bottle, let go of your finger, and the reagent will be inhaled.
2. After taking the liquid, the dropper should keep the rubber head above, and do not lay it flat or upside down to prevent the solution from flowing back and corroding the rubber head.
3. When dropping the liquid, it should be suspended above the beaker, do not touch the wall of the beaker, so as not to stain the dropper or cause contamination of the reagent.
4. Do not put the dropper on the test bench or other places, so as not to stain the dropper.
5. The used dropper should be rinsed with clean water immediately for reuse.
6. It is strictly forbidden to use the dropper that has not been cleaned to draw other reagents (the dropper on the dropper bottle should not be rinsed with water).