The dropper is a scientific and technological product, which is divided into fat belly dropper and common dropper, and is composed of a rubber nipple and a pointed glass tube.
There are fat belly droppers and common droppers.It is composed of a rubber nipple and a pointed glass tube.
purpose
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Graduated dropper
Suck or add a small amountreagentAnd absorb the supernatant to separate the precipitate.
matters needing attention
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During dripping, the dropper shall be kept perpendicular to the top of the container to avoid tilting. It is forbidden to stand upside down, stretch into the container, or touch the container wall.In addition to absorbing solution, the tube tip shall not contact other objects to avoid contamination by impurities.Do not use one tube for two purposes.
The ordinary dropper needs to be cleaned after use, while the special dropper cannot be cleaned. It needs to be used by the special dropper. After use, it can be put back to the original reagent bottle.
When using, do not hold it with your thumb and forefinger, but use your middle finger andring fingerClamp.
usage method
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1. When using the dropper, squeeze the rubber nipple with your finger to drive out the air in the dropper, then put the dropper into the reagent bottle, release your finger, and the reagent will be inhaled.
2. The dropper after taking the liquid shall keep the rubber head above, and shall not be placed horizontally or upside down to prevent the solution from flowing back and corroding the rubber head.
3. When dropping liquid, it should be suspended above the beaker. Do not touch the beaker wall to avoid contaminating the dropper or reagent.
4. Do not put the dropper on the test bench or other places to avoid contamination of the dropper.
5. The used dropper shall be immediately washed with clean water for reuse.
6. It is forbidden to use an unwashed dropper to absorb other reagents（DropperDo not flush the dropper on the.
