The power of the analytical blank.

Acid Purification Systems

  • Substantial ROI

    Up to 90% cost savings of ultra-pure acids by purifying low-cost reagent grade acids.

  • On-demand acid purification

    Works with a variety of acids; also, suitable for purification of organic solvents.

  • Designed for your needs

    Single, double or triple distill reagents (ppb, ppt)

  • Effective and efficient

    Re-purify contaminated acids with no waste.


Learn more about the factors that impact the analytical blank, digestion techniques, and Milestone’s Clean Chemistry products designed to help you maximize your ICP-OES and ICP-MS data.

Download Think Blank Primer

“In the preparation of high purity reagents, there is only one significant and practical choice for the method of purification: sub-boiling distillation.” – US EPA SW-846, Chapter 3, Update IVB.

Reagent contamination increases the background concentration of analytes present in a sample. Because of this, laboratories purchase expensive high-purity acids for trace metal (element) analyses. With small samples sizes, it is critical to keep blank levels low for good reproducibility. Milestone’s duoPUR and subCLEAN, sub-boiling distillation systems allow laboratories to make their own high purity acids at dramatically reduced costs.

Sub-Boiling Technology

The chemical reagents used during the analysis are an important source of the analytical blank. Sub-boiling distillation has been demonstrated to be the best method of acid purification. It uses contactless infrared lamps to vaporize the surface liquid at a temperature typically 20 °C below the boiling point.

With conventional distillation, the boiling of acid generates aerosolized particles, resulting in contamination of the distillate. In contrast to this, gentle surface evaporation during sub-boiling distillation prevents the formation of spray or droplets, yielding high purity acids.

sub-boiling distillations vs conventional technology

Additional Clean Chemistry Resources


Clean Chemistry Brochure DOWNLOAD


Get answers about our Clean Chemistry Products. DOWNLOAD


Learn How Acid Purification allows labs to purify low-cost reagent grade acids. DOWNLOAD

User Profile

DuoPUR Lowers Cost and Increases ROI for Water Testing Lab. DOWNLOAD

ROI Worksheet

How Much Will Sub-Boiling Distillation Save You Each Month? DOWNLOAD

For more information call 866-995-5100 or email us below