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Illustration of a water purification system
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Purchasing Guide: Water Purification Systems

Water purification systems remove contaminants from feed water

by Lab Manager
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The Milli-Q® IQ 7005 Pure & Ultrapure Water Purification System
The Milli-Q® IQ 7005 Pure & Ultrapure Water Purification System,
Credit: Sigma-Aldrich

Water purification systems remove contaminants from feed water, including inorganic ions, organics, colloids, gasses, bacteria, and proteases to ensure accurate results, cleaning, preventing mineral buildup, and more. Depending on your applications and the space you have in your lab, there are many different filtration types, water purification techniques, and system configurations that could work best. For a list of lab water purification system manufacturers, see our online directory:

6 Questions to Ask When Buying a Water Purification System:

  1. What level of purification do you need?
  2. How much water will you require at one time?
  3. How often do filters and cartridges need to be replaced?
  4. How long does it take for the unit to purify the water?
  5. Where will the system be located, and do you have enough space?
  6. Can the system be expanded if demand increases?

Sustainable Water Purification

Collecting the ultrapure water that many lab applications require can consume a lot of energy and resources. However, it’s possible to optimize your lab’s water purification processes and minimize environmental impact, such as by maintaining purifiers properly to maximize lifespan and making greener purchasing decisions upfront. Learn more at

Water Purity in Spectrophotometry

Spectrophotometry requires very pure water. There are several water purification techniques that can be used for spectrophotometry workflows, including distillation methods, the use of activated carbon filters, and more. Learn more about this topic at