Cheapest way to get/make DI water?

[EddieM]

Does anyone have tips regarding the cheapest (and easiest) way to get or make DI water?

[Giovanni Lostumbo]

This was discussed recently in the thread: "What equipment can we
develop?"
https://groups.google.com/group/diybio/browse_thread/thread/5f0556ea2c843285/625b14cf6ff311f6?hl=en&q=#625b14cf6ff311f6
Check the bottom. At Tesco in the car battery section and aquarium
stores.
I discused some ideas for reverse osmosis, etc.

[Giovanni Lostumbo]

and "or camping supply stores
and such as well. "

On Jan 5, 5:44 pm, EddieM <Ed...@moler-steven.org> wrote:

[Giovanni Lostumbo]

the first page where it's first mentioned is accessed by clicking
(older)
https://groups.google.com/group/diybio/browse_thread/thread/5f0556ea2c843285/f0b38bac275ec279?hl=en&

On Jan 5, 5:50 pm, Giovanni Lostumbo <giovanni.lostu...@gmail.com>
wrote:

[Tito Jankowski]

Many grocery stores have distilled water. I've bought it at Safeway
(Safeway brand distilled water) for simple science use. As far as I
know, distilled water is equivalent or purer than deionized (DI)
water.

Tito

On Wed, Jan 5, 2011 at 9:44 AM, EddieM <Ed...@moler-steven.org> wrote:
> Does anyone have tips regarding the cheapest (and easiest) way to get or
> make DI water?
>

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[Jay Woods]

Dig a hole in the ground about 2 gallons deep.
Put enough dirt back in the hole to make a barrier across the
bottom of the hole; one side should be about 1 gallon in size,
the other should be about 1 qt in size.
Put a 1 sq yard sheet of black plastic across the hole and sink it
to the bottom of the hole so that it hangs up the sides and
across the ground.
Put a 1 sq yard sheet of clear/translucent plastic across the
hole.
Anchor the edges of the clear plastic around the hole.
Put a 2 oz stone on the clear plastic centered over the 1 qt
side.
Let the sun shine.

[EddieM]

Thanks all for the suggestions  and pointers. Distilled water from the grocery store is simple and easily accessible... as long as one can trust the quality. I'll go with that for now. Cheers!

[Nathan McCorkle]

I think an RO system runs about $150 - $250... and is good for lots of gallons

an ohmmeter will also give you a measure of the ions in solution,
(http://en.wikipedia.org/wiki/TDS_meter), which could be important if
you were doing electroporation or microfluidics

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--
Nathan McCorkle
Rochester Institute of Technology
College of Science, Biotechnology/Bioinformatics