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Topic: calibration question  (Read 6965 times)

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Offline abcc

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calibration question
« on: October 25, 2006, 03:31:21 AM »
Why do we need to have calibration of a pipette in analytical expertment ???
what's the problem of the pipette ???
Can some1 explain to me in a little bit detail :-[
thxthxthxthxthxthx
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Offline Borek

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Re: calibration question
« Reply #1 on: October 25, 2006, 12:21:44 PM »
There is no such thing as absolutely precise glassware.
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Offline abcc

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Re: calibration question
« Reply #2 on: October 25, 2006, 06:48:30 PM »
Quote from: Borek on October 25, 2006, 12:21:44 PM
There is no such thing as absolutely precise glassware.
what do you mean "precise" ???
thickness ? volume ?
thx
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Offline Borek

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Re: calibration question
« Reply #3 on: October 26, 2006, 03:03:25 AM »
Quote from: abcc on October 25, 2006, 06:48:30 PM
what do you mean "precise" ???
thickness ? volume ?

Precise as in "ideal". Just because there is some volume mentioned on pipette doesn't mean it will really measure this volume. It will measure (assuming perfect technique is used) volume that lies somewehere in the range given volume +/- pipette accuracy.
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Offline abcc

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Re: calibration question
« Reply #4 on: October 26, 2006, 08:49:27 PM »
Quote from: Borek on October 26, 2006, 03:03:25 AM
Quote from: abcc on October 25, 2006, 06:48:30 PM
what do you mean "precise" ???
thickness ? volume ?

Precise as in "ideal". Just because there is some volume mentioned on pipette doesn't mean it will really measure this volume. It will measure (assuming perfect technique is used) volume that lies somewehere in the range given volume +/- pipette accuracy.
THX ;)
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