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Author Topic: Distilled water - where to buy in UK?  (Read 18620 times)

Offline jago25_98

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Distilled water - where to buy in UK?
« on: 19/04/2004 12:44:22 »
I need some distilled water, potentially lots of it, for a little contoction I'm trying to make.

 I'm told ionised water is the same. That can't be right? Ioised is just ionised, distilled has been evaporated? I think the guy who told me that is talking rubbish but I need to be sure. If something is deionised, does that mean the result is similar to distillation? - that the term 'deionised' describes the liquid, whereas distilled describes the process to form it?

 I can't seem to find anywhere on the high street that sells distilled water. It's all ionised. Assuming there's a difference, I need it to aggressively disolve the ions I'll be introducing. I can't use tap water or grit will form around what I'm introducing to the liquid.

 Sorry for such a basic question!


 

Offline neilep

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Re: Distilled water - where to buy in UK?
« Reply #1 on: 19/04/2004 13:21:10 »
I always remember purchasing ditilled water from garages....if you can 'distill' do that today then perhaps a kind word into garage persons ear may supply you with their suppliers number.....or...a quick look in google leads you to desktop distillers for drinking....could that help ?

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Offline chris

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Re: Distilled water - where to buy in UK?
« Reply #2 on: 20/04/2004 05:34:12 »
De-ionised and distilled water are the same thing - pure water - but produced a different way.

De-ionised water is usually made by passing the water through a matrix that 'captures' dissolved ions, permitting only water (H2O) molecules to pass through.

Distilled water is made by boiling water and condensing the vapour. Dissolved ions raise the boiling point and are left behind.

These products are supplied with different 'tolerances', that is, different levels of purity, which is reflected in the price. These range from cheap de-ionised water which might contain low levels of solute and may even carry micro-organisms (because it has not been handled in a sterile fashion after preparation) through to molecular biology grade water with guaranteed purity (and is made by Baxter).

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Offline Ylide

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Re: Distilled water - where to buy in UK?
« Reply #3 on: 20/04/2004 06:56:24 »
I think the reagent-grade water chris mentioned is made solely by direct reaction of hydrogen and oxygen gases in a sterile, non-metallic environment.  It's not cheap...I think we pay something on the order of $20 per 500ml bottle for it.


If you need to buy a LOT of it, I'd suggest just making it yourself.  Get some tap water, purify it as best you can through a water filter, then buy distillation glassware.  It'll set you back a little money, but you'll make it up by not paying by-the-gallon.  (or liter, or whatever you use in the UK)




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Offline jago25_98

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Re: Distilled water - where to buy in UK?
« Reply #4 on: 20/04/2004 12:07:14 »
thanks for the explaination Chris :)

I think the best thing for me to do is try it with low grade deionised and see what happens.

Thanks muchly!

p.s. does anyone know of websites dedicated to instructing how to make various chemicals? An example:
newbielink:http://www.steroidology.com/forum/forumdisplay.php?s=31c3739b4a91cfe02295b6dabd6474f6&forumid=38 [nonactive]
 

Offline MayoFlyFarmer

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Re: Distilled water - where to buy in UK?
« Reply #5 on: 21/04/2004 07:30:04 »
canabinoid, how do you react H and O in a purely non metallic environment? I thought you needed a metallic catalyst for this rxn?

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Offline Ylide

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Re: Distilled water - where to buy in UK?
« Reply #6 on: 21/04/2004 07:52:19 »
Hydrogen burning in an oxygenated environment.


2H2 + O2 -> 2H2O

Perhaps you recall the Hindenburg?

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Offline MayoFlyFarmer

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Re: Distilled water - where to buy in UK?
« Reply #7 on: 21/04/2004 17:06:55 »
So all you need is heat??  Any idea how much.  When I was in (I almost think highschool) chemistry, they told us that you can't react H and O to make water without a catalyst (I think it was a Pt catalyst, but taht could be wrong).

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Offline Ylide

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Re: Distilled water - where to buy in UK?
« Reply #8 on: 22/04/2004 04:17:25 »
You just need fire or a spark.  (not necessarily heat)  One of the first experiments i ever did as a junior chemistry student was to collect hydrogen in one test tube and oxygen in another, then unstopped them next to each other with a flame in between.  There's a nice popping sound that reverberates through the test tubes as they combine into water vapor.  



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Offline jago25_98

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Re: Distilled water - where to buy in UK?
« Reply #9 on: 22/04/2004 15:59:44 »
Hmm, well I tried it and it hasn't completely dissolved.

I may try heating it gently to encourage to go into solution.
 

Offline Ylide

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Re: Distilled water - where to buy in UK?
« Reply #10 on: 23/04/2004 03:42:08 »
What are you dissolving and why?  Perhaps I can suggest a better solvent  if water is not doing the trick.  Try a higher temperature first if the material isn't too explody.  (that's a technical term, ya know)



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Offline jago25_98

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Re: Distilled water - where to buy in UK?
« Reply #11 on: 25/04/2004 14:13:48 »
dissolving Zinc (from vitimin pill).
 

Offline Ylide

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Re: Distilled water - where to buy in UK?
« Reply #12 on: 25/04/2004 19:28:22 »
What form is the zinc in?  It should say on the bottle ingredients somewhere if it's elemental or a salt.  

Is it a multi-vitamin or just a zinc pill?



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Re: Distilled water - where to buy in UK?
« Reply #12 on: 25/04/2004 19:28:22 »

 

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