In the preparation of high purity reagents, there is only one significant and choice for the method of purification: sub-boiling distillation

Quartz sub-boiling distillation system

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.


The duoPUR offers an alternative to the purchase of expensive high purity acids for trace elemental.

  • 90% cost saving of ultra-pure acids by purifying low-cost reagent grade acids
  • High productivity, up to 400 mL per hour (duoPUR) and up to 60 mL per hour (subCLEAN)
  • On-demand acid purification
  • Re-purification of contaminated acids