Water spots.
Anyways it got me thinking, so I looked into buying the filtration system to purify the water to clean my bike, problem is you dont need much water to do the bike and the system is about Ł100, I mentioned it to a friend of mine who keeps Marine fish, and he said that he bought his filtered and purified water from the Aquatics shop for Ł1 for 5gallons, I went along to the shop, and sure enough its the same water filtration system, so I bought a clean 5 gallon drum and got some.
I cleaned the bike in the normal way with a kind of cleaner/degreaser that I use called Mucoff and a fine brush to agitate the dirt and then rinsed the bike of with the clean water pumped from a Garden spray bottle, a sort of 1 gallon tank with a lance attached and you pump up the pressure from the top.
Result, I was a little sceptical but it really worked, and for very little outlay.
I am very familiar with the difference between distilled and deionized water. I worked in a chemistry lab during my undergrad days.
I have to disagree with you.
Without getting into the semantics, distilled and deionized water are essentially interchangeable for everyday use (the average Joe), even in batteries, radiators, steam irons, etc. There would be very little difference between the two but, for sure, either of the two would be better than tap water. I beileve what you said, "That is why you may hear that Dio water is the best water you can use, for instance, like in a car battery", is old thinking. The thought now is that either distilled OR deionized water can be used in batteries or radiators. One is not necessarily better than the other.
Getting into the details, the most common process to deionize water is to use column(s) of an ion exchange resin. As a consequence, there may still be nonionic contaminants remaining in the water. Some of those contaminants may not be ionic but may have polar properties where one portion of the molecule has a more positive or negative charge than another. It is these contaminants that can still have a negative (corrosive) effect in batteries or radiators. Those effects are not just from ions. Certainly unwanted ions in a battery will affect the electrical properties of the battery.
Distillation, in theory, should remove all ions (except H+ and OH-) and nonionic molecules. In my opinion, distilled water is "purer" than deionized water. In your situation, which sounds like a chemistry lab, unwanted ions can interfere with the chemical processes, therefore, the water needs to be as clean and deionized as possible. You stated "we have to use it at work to run certain tests. It has to be 100% pure AND deionized." The best way to obtain that kind of water is to distill it first and then deionize it.
The problem is distillation requires a great deal of energy input ($) to convert liquid water to steam. It is not as cost effective to distill versus deionization if you require a large volume of the purest water. Also, the average individual (you and me) doesn't have the PRACTICAL means to distill water. I know I can boil water on the stove all day long but that is too expensive. It is, though, very easy to deionize water. Ion exchange resin systems are readily available.
Now, in regards to your post about water spots, deionized water would be more likely to contain nonionic molecules that can deposit on surfaces than distilled water would. In reality, it would be such a small concentration that there would likely be very little difference. For you, since you work in a lab, you have ready access to this water and you can get it without cost (hopefully). For me, it is easier to purchase.
So, in my opinion, for everyday uses, deionized and distilled water are essentially the same.
By the way, I am glad you are back riding again. Looking forward to seeing pictures of your bike after all the mods are complete.
The Best of Harley-Davidson for Lifelong Riders
There are different types of reverse osmosis systems depending on the membranes (filters) used and the extent of filtration but, for the most part, the end result is the same. To answer your question; yes, reverse osmosis systems will remove ions, minerals and large molecules as well as biologics (bacteria and viruses) quite well. Thirty cents a gallon for good drinking water is not a bad deal.




