[aeacfm]

mix  i think it contain Zn , Pb & Fe is there a specific test for each cation  in the same mix or i must separate them first ? 

[Borek]

There are tests specific enough for iron and lead, I am not so sure about zinc.

[408]

define "test"...

Do you mean adding a reagent and seeing a ppt or colour change, or can you stick it in an AAS?

[aeacfm]

i mean visual test , rapid test  any test but in the same mix specific for one cation and not the other

[brain]

i mean visual test , rapid test  any test but in the same mix specific for one cation and not the other

you can directly use AAS or ICP using the same sample .
or if you want to do by titration you have to take a portion
of sample to identify the element you want
divided the same sample to parts .

[aeacfm]

unfortunately  icp has problem