From: Yu rei (nanocrystals2003@yahoo.co.jp)
Date: 05/26/03-10:31:28 PM Z
I agree with the 20 drops to the mL.
but be careful about pipettes (pippets?) they are not all
the same and even the same one may deliver different sized
drops depending upon a couple of factors it would seem!
And anyway remember, for many applications, accuracy is
usually less important than precision (repeatability).
Last drop: When it is important, test everything!
Ray
--- Art Chakalis <achakali@gcfn.org> $B$+$i$N%a%C%;!<%8!'(B
> > In all of my previous work with alternative
> printing I have been
> > quite content to carry out measurement with the
> cc or ml, even down
> > to 0.1 cc or ml with syringes. Now, in doing a
> little reading on
> > Pt/Pd printing I see that the drop appears to be
> the unit of
> > measurement. So how much is a drop? Is there such
> a thing as a
> >standard drop?
> >
> > Sandy
>
>
> --
> Sandy,
>
> I have always used 20 drops = 1 cc for water based
> upon college chem labs
> (recent stuff . . . just a few decades ago).
>
> Before sending this note I checked several
> conversion tables and none of
> them show a conversion factor for 'drops'. The
> volume/size of a drop would
> certainly be dependent upon the surface tension and
> density of the fluid and
> would likely be affected by the shape of the dropper
> tip.
>
> The use of drops does seem a bit inane as compared
> to an accurate pipette.
>
> Art
>
>
>
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