| |
 |
| Author |
Message |
|
|
|
Tue Sep 08, 2009 6:55 pm  |
I bought Demineralised water yesterday as thats all was down in the laudry isle.
So is this the same as distilled water as I am wanting to use this for the vitamin c toner receipe.
Thanks  _ |
|
|
|
|
|
Tue Sep 08, 2009 8:20 pm |
Hi Pal,
I'm sure someone more knowledgeable will chime in, but while the two are different, I think demineralised water is okay for DIY. According to wikipedia, distilled water:
involves boiling the water and then condensing the steam into a clean container, leaving most solid contaminants behind. Distillation produces very pure water but also leaves behind a leftover white or yellowish mineral scale on the distillation apparatus, which requires that the apparatus be frequently cleaned. Distillation does not guarantee the absence of bacteria in drinking water; unless the reservoir and/or bottle are sterilized before being filled, and once the bottle has been opened, there is a risk of presence of bacteria
For many applications, cheaper alternatives such as deionized water are used in place of distilled water.
Whereas deionised water:
also known as demineralized water, is water that has had its mineral ions removed, such as cations from sodium, calcium, iron, copper and anions such as chloride and bromide. Deionization is a physical process which uses specially-manufactured ion exchange resins which bind to and filter out the mineral salts from water. Because the majority of water impurities are dissolved salts, deionization produces a high purity water that is generally similar to distilled water, and this process is quick and without scale buildup. However, deionization does not significantly remove uncharged organic molecules, viruses or bacteria, except by incidental trapping in the resin. Specially made strong base anion resins can remove Gram-negative bacteria.
It then goes onto to say:
Deionized water is very often used as an "ingredient" in many cosmetics and pharmaceuticals where it is sometimes referred to as "aqua" on product ingredient labels. This use again owes to its lack of potential for causing undesired chemical reactions due to impurities.
So I think it's an okay substitution. I found (in Aus), that demineralised water was easily found in supermarkets, but for distilled I'd have to rely on the local chemist ordering some in and then decanting some into a bottle for me (and charging!). And while I can't claim to understand the science-y differences between the two, it seems that any advantages re sterility that distilled water may have over demineralised would be rendered nil given all the decanting and mixing and exposure to air that occurs with DIY. Also, if demineralised is already being used in cosmetics... it should be suitable.
However, somebody with a science background maybe able to shed more light? Hope this helps.
Lee |
|
|
|
|
|
Wed Sep 09, 2009 12:23 am |
Hi Chessestoastie
Thanks so much for your detailed reply. I also posted the same question on another site and was given pretty much the same advise that it would be a suitable subsitute for what I am wanting if for. She also worked in a lab so I am comfortable with that... so I guess your right also:) Once again thanks for talking out the time to post so much info.
Cheers |
|
|
|
|
| Tue Feb 11, 2025 9:18 am |
If this is your first visit to the EDS Forums please take the time to register. Registration is required for you to post on the forums. Registration will also give you the ability to track messages of interest, send private messages to other users, participate in Gift Certificates draws and enjoy automatic discounts for shopping at our online store. Registration is free and takes just a few seconds to complete.
Click Here to join our community.
If you are already a registered member on the forums, please login to gain full access to the site. |
|
 |
|
|
