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Angela: Do you have a picture of a pipette? (general)

posted by Zedinhim(R), 08.25.2015

Yep that’s about right, my paper clip weighs in at 0.4 gram, just under 1/2 of a gram using my jeweller’s pocket scales, my scales measures in 0.1 (1/10th) of a gram increments, that’s accurate enough for my hobby needs. Fezik the scales at your work must measure in 1/100 of gram increments, that’s like very fine. I’m curious as to why your workplace uses metric rather than imperial in the US? I’m guessing it’s the simplicity and I have read somewhere that the metric system is preferred for accuracy, I’m not so sure.
Some pipettes that I have used measure in millilitres, the tube that holds the liquid has like markers on it to indicate .5, 1, 1.5, 2 etc millilitres, and some pipettes have no indicating marks, as you have correctly said that different liquids have different weight. Having said that, the volume of 1 millilitre of pure water @ 20 degree Celsius equals exactly 1 gram, how good is that.
So I was wondering, you mentioned that at work you use a pipette to measure liquid on scales, that would mean that you would have a known tare weight of the empty pipette, fill it with liquid than weigh both liquid and pipette, then apply some liquid to wherever and then reweigh and subtract the difference. (Nah too many steps, there’s got to be an easier way.)

 


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