"Philippe Lemaire \(remove oldies\)" wrote in message ...
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"Philippe Lemaire \(remove oldies\)" wrote in
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Thanks to ALL !

The answer lies somewhere between 10 and 50 per ml
with a mean at 20.

Making a self experiment is not so easy with costly
and/or dangerous products...

I just would like to improve on Ca titration using
a serynge marked 0 to 200 (= 2ml)...

Philippe

"Philippe Lemaire (remove oldies)" wrote in
message e...
Dear all,

Does anyone has an idea ?
is it really constant (when no viscosity is present) ?
Or does it depend of the hole size ?

Philippe

20 drops per ml is the the most used amount I've seen.
But those drop do vary

Doubt it'll make or break any dosing routine you might have in mind.
Regards,
Tom Barr



Thanks !

I wanted to have a better precision measuring Ca...
A first idea is to double the water and the first two reagents,
then count every drop for half the Ca concentration !

These drops being done with a "cheap" bottle I would prefer
to take the titration liquid in the 2 ml syringe and the read the
value...

Do you mean I have to be also very precise with the NaOH
quantity I put at the beginning ?

Regards,

Philippe

Well yes, but I don't think you are going to impriove to accuracy that
much doing all this.

You might count the drops with the dropper you plan on using and do
some averages of 20 drops to volume.

That would measure specifically what you are using as a ruler.
Do sevral runs to see if things are repeated well.

Regards,
Tom Barr