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<p>[QUOTE=&quot;RickieB, post: 665909, member: 2486&quot;]Ultra pure non conductive water is also know as WFI...(Water for Injection) it is used in the Mfg of all human injectable drugs, vaccines, etc etc...@ ~18-18.5 mega Ohms it is considered ultra pure and non conductive.</p><p>It is also stored at very high temps to prevent or discourage bacterial growth...some thermophilic bacteria can live in the high temp ranges but none that are common in a laboratory environment.</p><p><br /></p><p>From a Pharmaceutical standpoint, contamination of a WFI system is often linked to what is commonly referred to as a bio-film lining the internal portions of a stainless steel supply pipe. These inhabitants are mutants that are formed when NH4 and Cl gas is used in disinfection of a water supply, when distilled, they pass through as a distillate and form what is known as a glyco-polysaccharide that formed from the chemical transformation of trihalo-methanes.</p><p>I recall doing a study on on this when I worked in a pharmaceutical manufacturing lab for a company called Genzyme Biotherapeutics.</p><p><br /></p><p>Oh..one other thought, repeated exposure of ionic material to deionized water will lead to leaching of ionic material from the source to the water....this will cause pitting of metal over long periods of time.</p><p><br /></p><p>Water is a pretty cool thing!!</p><p><br /></p><p><br /></p><p>RickieB[/QUOTE]</p><p><br /></p>

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