[RASMB] density meter accuracy/precision

[Stephen Eyles]

Hi AUCers.

We are contemplating purchasing a densitometer to more accurately  
determine densities of our buffer solutions for AUC.
What precision/accuracy is really necessary?  I know the de facto  
standard instrument seems to be the Anton Paar DMA5000 but is this  
overkill?  Aside the significant extra expense, is there a real  
benefit to 6-decimal place measurement of density or could we do a  
reasonable job with a hand-held instrument?  Weighing known volumes on  
a balance clearly isn't cutting the mustard!

Thanks for any advice and helpful tips.

Steve

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Dr Stephen J. Eyles
University of Massachusetts - Amherst
Amherst, MA 01003, USA
eyles at polysci.umass.edu
Tel: (413) 577-1528
Fax: (413) 545-0082
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