Asked by poonam
A reference solution is to be prepared
with 5 PPM parabenzopyrene
(molecular weight = 252). The quantity
of parabenzopyrene required for
preparing one litre 5 PPM solution is
with 5 PPM parabenzopyrene
(molecular weight = 252). The quantity
of parabenzopyrene required for
preparing one litre 5 PPM solution is
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