Bis-tris-propane: temp. coeff. (dpKa/dT) ??

[Uwe Kaerst]

In article <322DF927.7352 at ibex.ca>, achim at ibex.ca says...
>
>Hi all,
>
>I am looking for the temperature coefficient(s) [dpKa/dT] of the
>buffer-substance
>'bis-tris-propane' = 1,3-bis[tris(hydroxymethyl)methylamino]propane 
>for some enzyme kinetic experiments.  
>
>According to the supplier (Sigma) it has the pKa-values:
>pKa1=6.8 and pKa2=9.0 at T=25C.
>
>Sigma doesn't know the dpKa/dT-value(s) either.
>Can anybody help ?
>
>
>Thanks,
>
>Achim

Hi Achim,

I found the following information in a booklet from Calbiochem:
pKa 1 = 6.8 at 20 C, dpKa/C = -0.016

Uwe

-- 
Uwe Kaerst
Dept. Enzymology
GBF  - Gesellschaft fuer Biotechnologische Forschung
Mascheroder Weg 1
D-38124 Braunscheig, Germany
Tel:  +(49) 531 6181 318
Fax: +(49) 531 2612313
EMAIL: kaerst at gbf-braunschweig.de
          
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