question about making sodium ortho-vanadate stock solution

[Z.L. K]

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
few cycles until the color is gone after pH to 10. However, some other
recipes do not mention this at all. Since quite a significant amout of
recipes I checked online emphasize this step, and I really don't want
to make a wrong solution for my experiment, I would like to ask if
anybody knows why one needs to (or IF one needs to) pH-ing and boiling
the solution when preparing sodium ortho-vanadate stock? I came across
to a line online saying this would help to activate the chemical
compound, however all the websites I checked, including vendor
websites who sell this compound, do not mention anything regarding
this either. Thanks if you can help me to straight this out!