Making Pure Water for Testing Purposes

Making Pure Water for Testing Purposes

Since the water you purchase is likely to have solvents in it
and since your tap water may be polluted with heavy metals and
since your (or a store's) filtration system may be clogged, it is
important to make your own pure water.
Purchase a “filter pitcher” made of hard, opaque plastic, not
the clear or flexible variety (see Sources). Fill the pitcher with
cold tap water, only, not reverse osmosis, distilled, or any other
water, since solvents do not filter out as easily as heavy metals.
The filter should be made of carbon only. To make test substances,
use fresh water in the pitcher and pour.
If your water has lead, copper or cadmium from corroded
plumbing, the filter will clog in five days of normal use. So use
this pitcher sparingly, just for making test substances and for
operating the Syncrometer.