question about making sodium ortho-vanadate stock solution

Dr Engelbert Buxbaum via (by engelbert_buxbaum At
Wed Dec 13 10:11:50 EST 2006

Z.L. K wrote:

> I checked some online recipes about how to make sodium ortho-vanadate
> stock solution, some talk about pH-ing the solution first after the
> reagents completely dissolve in water, which would then turn to yellow
> after pH-ing to 10, then the solution needs to be boiled to get rid of
> this color, this process (pH-ing then boiling) need to be repeated a

For which purpose do you need the solution? For phosphate determination
boiling is not required.

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