Shopping Cart Items: 0   Sub-Total : US$0.00
Welcome, Guest ( Login )
Celebrating 34 years providing high quality products and advice.
Our Local Time Is 8:49:58 AM.
Call us at 818-786-0600. We are here to help!
Millipore and Barnstead Laboratory Water Filtration Need a New Laboratory Water System?
We have many to choose from. We can save you thousands on
Complete Systems and replacement filters for most brands.
Laboratory Water Systems Laboratory Process Filters Laboratory Equipment Water Treatment

APS TechNotes See all articles

Laboratory Water Stills Not pure enough for modern lab applications

Distillers are obsolete for many scientific applications.

Distillation is a very old technology that has been replaced with laboratory water polishing systems.

Lab Water Polishing Systems


The main problem with a distiller is that you MUST store the water. Since the storage tank MUST be vented to atmosphere to avoid collapse, the stored water rapidly absorbs Carbon Dioxide which degrades the water significantly. As the CO2 enters the water it produces carbonic acid, very low pH and high total dissolved solids. For this reason distilled water is not recommended for TYPE I or other critical lab applications.

CO2 + H2O = H2CO3 or Carbonic Acid
You can expect a pH of 5.5 on most distilled water.

Pure water always has a pH of 7.0


Distilled water will fail to produce water that is pure enough for most laboratory applications. Most of these application require ASTM Type I water that is 18.0 Megohm in ionic purity. Distillers can not meet this basic required specification.

ATSM Laboratory Water Specifications


Lab Polishing Systems eliminate this failure by purifying the water as you use it. The pure water is no longer stored and is significantly purer than distillation. Lab Polishing system can consistently produce water of extreme purity that is pyrogen free, ion free and organic free making it a much better choice compared to distillation units for science applications.



Open To The Public

Why Use APS??

Independent Reps Wanted

Need Live Help?

Contact Us
818-786-0600

Short Lead times.
Lab Water Deionizer

Best
Lab Water System

Top Sellers

Most Popular
Fume Hoods

Glassware Washers

Images are representative of the products. Images may or may not be of the actual product. If it is important e-mail us for an actual image if available.

* Flat Rate UPS shipping when able to ship via UPS and is in the USA excluding Hawaii and Alaska.
Larger Items may not be able to ship via UPS, in that case freight charges will be quoted seperately.
International shipping will be quoted after the order is placed. You will have the opportunity to cancel before we finalize your order.

Terms and conditions
Credit Application
Privacy Policy
Google Apps
List All Products