Do you know about safety in a laboratory?

Question

I need help in a question for my safety worksheet. This is to keep for ourselves so it won't be graded or anything. Later on this week we will have a quiz on it though!

01. What should you use to draw liquid into a pipet?

Thank you very much!

Answer 1

you use a pipet bulb, which you squeeze and then place on top of the pipet to suck up a liquid.  

Answer 2

suction, but not from your mouth! I've seen versions of this question... but the main thing your teacher is looking for is probably how to never use your mouth to draw liquid into a pipet. that's what is says on the flinn sci sheet anyway! Hope that helps, good luck!

Answer 3

The humble pipette has since spawned many astoundingly advanced offspring. Nevertheless, each and every one of them is as much of a glorified turkey baster as the last, operating on the same general principle of pressure exchange. Walk into any molecular genetic or microbial lab and you'll find them, scattered across the bench-top like cutlery at a picnic or perched on elaborate plastic racks. Generally, pipettors are hand-operated. Those dispensing small volumes (usually ranging from 0.1 microliters to 1 milliliter) go for around one hundred US dollars each. Pipettors for larger volumes use an exchangable graduated column and range from cheap plastic versions to mega-pricey electric ones.

Holding a pipettor upside down while it contains liquid is extremely bad. Although there is really only one way to hold a pipettor, most people steady it with their other hand near the tip when doing delicate operations, like loading a well. Frequently, a tiny bit of fluid is left in the tip after dispensing -- if you need to be finicky, you should touch the tip against the container wall and let capillary action do its thing.