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Regarding the pipettes used for extraction
- Thread starter keruso
- Start date
Pipettes, while better than turkey basters, are still a hassle to use, at least for me. What I find most convenient to use is a separatory funnel. You can get one for relatively cheap and it'll make the process of extracting the NPS from your basified soup a dream compared to sucking it up manually and trying not to suck along any of the base with your NPS.
Good luck!
Good luck!
I, too, use a dispensing roto. However, when inhaling non-polar solvents, don't you use a pipette either way? Also, I don't think the Stb method can be used with aliquot funnels very well.
i preffer to use the rubber gooch bulbs, those syringe types slip and leak bad i found, they might be ok with cold water but have major issues with anything that produces any sort of fumes, not from pressure buildup, it just seems to slip. the larger ones, at 20ml or 30ml i think, also just is god awful, it looks nice but, if you are getting a cheap chinese one its going to be crap.
also, you can use a volumetric pipette, its a glass pipette with a glass bulb inside. they are used for precision measuring of fixed single values. like if you want to take exactly 20ml at an accuracy a hundred times finer than any measuring cylinder could measure.
the pipettes are very handy if you ever need to do a titration and one of the components is a liquid already diluted to an unknown degree while the other reagent is solid and can just be weighed.
the rubber pipette bulb is also compatible with much larger pipettes
the way the bulb works is, pipette goes in bottom (pic top) ,squeeze bulb while squeezing the top (bottom of pic) valve to release all air. then squeezing the bottom (top) valve causes the bulb to connect to the pipette and it sucks things up. squeezing the size arm valve lets air into the pipette to release the contents. View attachment 1740920920100.webp
View attachment 1740920658528.webp
also, you can use a volumetric pipette, its a glass pipette with a glass bulb inside. they are used for precision measuring of fixed single values. like if you want to take exactly 20ml at an accuracy a hundred times finer than any measuring cylinder could measure.
the pipettes are very handy if you ever need to do a titration and one of the components is a liquid already diluted to an unknown degree while the other reagent is solid and can just be weighed.
the rubber pipette bulb is also compatible with much larger pipettes
the way the bulb works is, pipette goes in bottom (pic top) ,squeeze bulb while squeezing the top (bottom of pic) valve to release all air. then squeezing the bottom (top) valve causes the bulb to connect to the pipette and it sucks things up. squeezing the size arm valve lets air into the pipette to release the contents. View attachment 1740920920100.webp
View attachment 1740920658528.webp
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