Ronald,

NO NO NO!!!! do not use copper tubing as the hot steam will put copper into the
distilled water.

When I bought my spectrophotometer the first test that they suggested was to
check the DW for copper.

The only materials that are acceptable are 316 stainless steel, pyrex  glass
(borosilicate glass), or quartz, that is if you want pure DW.

Then you will have a reasonable DW but it will be loaded with nitrogen. To solve
that one needs an argon atmosphere in the still.


"Ole Bob"




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