Storage solution for PH meter.

Storage solution for PH meter.

Post by Fran?ois Chaine » Sat, 14 Oct 2000 04:00:00



     Hi all.
     I just joint back the group lately and want to thank all of you
for the wonderful help we found in here.
    All the answer that I'am looking for just come in with out asking!
A lot of info about TA and PH which I realy needed.
  But here I have two opinions from mi supplyers:
Is it ok to keep the ph meter electrode in a ph 7 buffer solution
for storage?  Ore should I get a storage solution?

  Thank.
Fran?ois.

 
 
 

Storage solution for PH meter.

Post by joe_sa.. » Sun, 15 Oct 2000 10:02:53


Storage solutions are nice, but the pH 7 buffer is fine also.  Just
never store them in distilled water.  I am reviewing a pH meter FAQ I
wrote a while ago, I hope to repost it soon.

Regards
Joe


Quote:
>      Hi all.
>      I just joint back the group lately and want to thank all of you
> for the wonderful help we found in here.
>     All the answer that I'am looking for just come in with out asking!
> A lot of info about TA and PH which I realy needed.
>   But here I have two opinions from mi supplyers:
> Is it ok to keep the ph meter electrode in a ph 7 buffer solution
> for storage?  Ore should I get a storage solution?

>   Thank.
> Fran?ois.

Sent via Deja.com http://www.deja.com/
Before you buy.

 
 
 

Storage solution for PH meter.

Post by Dewey & Lucy Thompso » Mon, 16 Oct 2000 04:00:00


Quote:
>   But here I have two opinions from mi supplyers:
> Is it ok to keep the ph meter electrode in a ph 7 buffer solution
> for storage?  Ore should I get a storage solution?

Storage solution is generally preferred, however buffer 7 is the second best
alternative.  In fact some Hanna instruction paklets say to use the pH 7
buffer as storage.

never use water.

dewey

 
 
 

Storage solution for PH meter.

Post by Tom » Mon, 16 Oct 2000 04:00:00




Quote:
> >   But here I have two opinions from mi supplyers:
> > Is it ok to keep the ph meter electrode in a ph 7 buffer solution
> > for storage?  Ore should I get a storage solution?

> Storage solution is generally preferred, however buffer 7 is the second
best
> alternative.  In fact some Hanna instruction paklets say to use the pH 7
> buffer as storage.

> never use water.

That's good advice.  Storage solution is simply 3 to 4 normal potassium
chloride solution.  Dissolve 22 to 29 grams of KCl in 100 ml of distilled
water, and you have it.

Tom S

 
 
 

Storage solution for PH meter.

Post by Fran?ois Chaine » Mon, 16 Oct 2000 04:00:00


 Thank all. In fact, my pH meter is made by Hanna but dont have
the instruction.
   So I will go with the pH 7 solution since the cap that go over my pH
electrode only contain a few drops of liquide, it's a pain to buy a full
container of storage solution.
  I suppose there is expire date for that to?
  Thank.
Fran?ois.


Quote:



> > >   But here I have two opinions from mi supplyers:
> > > Is it ok to keep the ph meter electrode in a ph 7 buffer solution
> > > for storage?  Ore should I get a storage solution?

> > Storage solution is generally preferred, however buffer 7 is the second
> best
> > alternative.  In fact some Hanna instruction paklets say to use the pH 7
> > buffer as storage.

> > never use water.

> That's good advice.  Storage solution is simply 3 to 4 normal potassium
> chloride solution.  Dissolve 22 to 29 grams of KCl in 100 ml of distilled
> water, and you have it.

> Tom S

 
 
 

Storage solution for PH meter.

Post by Jeff Jerneg » Tue, 17 Oct 2000 04:00:00


Hmmm.  I have a Kenco portable model pH meter I got from Presque Isle,
and it came with a small storage solution bottle attached to the
probe, and no instructions for replacement solutions.  

The pH of the storage solution provided with the Kenco model 8514
Stick is 3.70 - nowhere near the ph7 Buffer.

As pH meter manufacturers may have different probe construction, and
therefore different storage solution requirements.  Does anyone know
what storage solution is recommended for the Kenco?

Jeff Jernegan
Maury Island Vineyards


Quote:
>>   But here I have two opinions from mi supplyers:
>> Is it ok to keep the ph meter electrode in a ph 7 buffer solution
>> for storage?  Ore should I get a storage solution?

>Storage solution is generally preferred, however buffer 7 is the second best
>alternative.  In fact some Hanna instruction paklets say to use the pH 7
>buffer as storage.

>never use water.

>dewey

Please send e-mail replies to address below

---------------
 Jeff Jernegan
---------------
email replies to:
jernegan at aa.net

 
 
 

Storage solution for PH meter.

Post by Dewey & Lucy Thompso » Tue, 17 Oct 2000 04:00:00


Quote:
> Hmmm.  I have a Kenco portable model pH meter I got from Presque Isle,
> and it came with a small storage solution bottle attached to the
> probe, and no instructions for replacement solutions.

> The pH of the storage solution provided with the Kenco model 8514
> Stick is 3.70 - nowhere near the ph7 Buffer.

> As pH meter manufacturers may have different probe construction, and
> therefore different storage solution requirements.  Does anyone know
> what storage solution is recommended for the Kenco?

Jeff:  I suspect that Kenco has you storing pH electrodes in buffer 4.  I
probably should have mentioned that above.  First choice, storage solution.
Second choice, buffer 7 or buffer 4.  It depends upon which reference you
read.  The Fisher Scientific FAQ on pH electrodes says in one place to use
buffer 4 for long term storage, in another place it says use buffer 7.  I
think it matters little as long as you don't use straight water.

Personally, I use buffer 7 because I have a big bottle of that and a small
bottle of buffer 4.................Interesting rationale we humans use
sometimes.

Below is the link to their FAQ for those interested.  If you want to know
anything about pH probes, this is probably the definitive place.  I don't
personally know what type of probe the kenco uses, but I betcha that it's
covered in this:

http://www1.fishersci.com/support/faq_labequip.jsp#meters

Dewey

 
 
 

Storage solution for PH meter.

Post by David Ree » Wed, 18 Oct 2000 09:58:45


On Mon, 16 Oct 2000 17:40:22 -0500, "Dewey & Lucy Thompson"
I've been told before to store the probe in a solution with a STABLE
pH near where most of the measurements we make are. So I store mine in
a pH 4 solution. Dunno whether it does any good or not.

David Reece

Quote:
>Jeff:  I suspect that Kenco has you storing pH electrodes in buffer 4.  I
>probably should have mentioned that above.  First choice, storage solution.
>Second choice, buffer 7 or buffer 4.  It depends upon which reference you
>read.  The Fisher Scientific FAQ on pH electrodes says in one place to use
>buffer 4 for long term storage, in another place it says use buffer 7.  I
>think it matters little as long as you don't use straight water.

>Personally, I use buffer 7 because I have a big bottle of that and a small
>bottle of buffer 4.................Interesting rationale we humans use
>sometimes.