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How we fix the validity period of a Normal solution and
re-standardization due date
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Answer Posted / shravan kumarm
Initially we have to prepare a normal solution and to
standardise that solution against aknown fresh normal
solution.After that in particular time intervals for
examples o th day ,7 th day ,15th day and 30th day we have
to restandardise that initial normal solution against a
fresh known noramal solution each time .up to which
interval the normality of initial solution will not differ
by more than +/-0.002,that interval day we can fix it as
validityperod.In this mean time we have to consider the
physical apperaence of the solution also in to cosideration.
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