1. How to wash pipettes and suction tubes?
Both the pipette and the suction tube can be washed with tap water, then rinse with distilled oil, when it is dirty (when the inner wall is hanging with water drops), it can be washed with chromic acid washing solution.
2. What is the method of washing a pipette or pipette with a lotion?
Take the pipette or suction tube in the right hand, a tube of the lower mouth inserted in the lotion, the left hand to take the rubber suction ball, first press the air inside the ball, and then the tip of the ball in the pipette or suction tube on the upper mouth, slowly loosen the left hand finger, slowly suck the lotion into the tube until it rises above the scale, wait for a while, then release the lotion back into the original bottle.
3. How to absorb the solution with a suction tube?
Use the thumb and middle finger of the right hand to pinch the upper end of the pipette or suction tube, the tube lower mouth is inserted into the solution to be taken, the insertion should not be too shallow or too deep, too shallow will produce suction, the solution sucked into the ear wash ball to stain the solution, too deep and will be attached to the tube too much solution.
Hold the upper end of the pipette or suction tube with the thumb and middle finger of the right hand, and insert the lower mouth of the tube into the solution to be taken, the insertion should not be too shallow or too deep. If it is too shallow, it will produce suction and drain the solution into the rubber suction ball, and too deep will lead to too much solution stuck to the outside of the tube.
4. What are the precautions for using a pipette and a burette?
(1) Pipettes and suction tubes used in precision analysis are not allowed to dry in the oven;
(2) the pipette and the volumetric flasks are often used in conjunction with each other, so the relative volume of the two is often calibrated before use.
(3) In order to reduce the measurement error, the starting point should be from the top scale of the pipette every time, and the required volume should be released downwards.
Should you have any inquiries or pipettes wholesale, do not hesitate to get in touch with WUBOLAB, the laboratory glassware manufacturer.
