[Histonet] Checking the endpoint of decalcification[Scanned]

Kemlo Rogerson Kemlo.Rogerson <@t> elht.nhs.uk
Wed Feb 16 03:02:47 CST 2005

I would assume that if you can use the sodium salt (NaOCOCOONa) then you use
the potassium salt (KOCOCOOK.H2O) as the cation has both the same valency
and does do anything.

The anion appears exactly the same but the potassium salt is attached to a
water molecule. The potassium salt is more toxic than the sodium equivalent.


-----Original Message-----
From: Maxim [mailto:maxim_71 <@t> mail.ru] 
Sent: 15 February 2005 15:56
To: histonet <@t> lists.utsouthwestern.edu
Subject: [Histonet] Checking the endpoint of decalcification[Scanned]

Dear Histonetters!
For checking the endpoint of decalcification is traditionally used 5%
solution sodium oxalate or ammonium oxalate. Solubility in 100 ml water
for sodium oxalate 3,7v/w, but for ammonium oxalate forms accordingly
4,5 v/w. Thereby, we get the saturated solutions of these salts.
Why to this effect do not use potassium oxalate? His solubility in
100 ml water forms 26,4w/v. Can be therefore that in solution is got
too high concentration oxalate and this test not will so be sensitive?
Or this there is else some explanation?
Thank you.
Maxim Peshkov, HTL
Department of biopsy and cytological research
Pathological and anatomical bureau
mailto:maxim_71 <@t> mail.ru

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