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This unique subboiling system is employed to produce high-purity acids for use in trace analysis by acid distillation. The acid is always fresh and is therefore guaranteed to be of the desired purity. Contaminated acids can be re-cleaned. Contact-free heating of the acids by means of an infrared lamp allows an equilibrium between the absorbed IR radiation and the liquid's evaporation heat to be established. This equilibrium state is reached at approx. 10°C/50°F below the individual acid's boiling point. This allows the acid to evaporate slowly for a gentle distillation. By cleaning more economical low purity acids, you can save up to 90% of the cost of analytically pure acids. As a rule, the system therefore pays for itself within the first year.

  • Suitable for HF, H2O, HNO3, HCl

Materials in contact with media
  • PFA and PTFE

Distillate quantities
  • 1 - 2 liters / 24 hr.

Attainable purity grade
  • Generally significantly better then <1ppb per element when starting with p.a. purity grade. (Multiple distillations will produce still higher purity grades.)


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In collaboration with its customers from the industrial and research fields, Berghof Products + Instruments develops intelligent equipment designs for chemical processes at high temperatures and pressures. Our laboratory equipment are characterized by our ease of handling, long service life and low operating costs. We offer intelligent modular systems that allow customers to configure systems to meet their own requirements. The use of innovative technologies is a decisive reason why chemical laboratories all over the world choose Berghof.