BÜCHI Labortechnik AG

Reflux Digestion - Solutions



For COD, heavy metal and hydroxyproline determination. You deal with limited lab space, changing samples and demands for different analytes requiring reflux digestion. We offer a modular all-in-one solution for both Kjeldahl and reflux digestion matching pre-existing external analytical instruments.

Range of applications

  • Aqua regia, HNO3 or HCl digestion under reflux (water) for heavy metal analyses in soils, electronic waste, water, food, feed, textile or hydroxyproline in meat.
  • COD determination to evaluate the water quality using air condensers according to ISO 6060.
  • Fast IR digestion for nitrogen determination according to Kjeldahl. Optional acceleration by continuous addition of H2O2 using a dedicated suction module.

Flexible and fast

  • Quick and easy switch between Kjeldahl and trace metal, hydroxyproline or COD digestion without laborious conversions.
  • Meeting changing needs with 20 ready-to-use pre-programmed methods for various sample matrices and storage of 30 personal methods.
  • Classical Kjeldahl digestion time can be reduced to 30 minutes.

Safe operation

  • Keeping the lab atmosphere free of harmful fumes with the ultimate four stage scrubbing system. Safe operation with aqua regia.
  • Gentle and controlled addition of H2O2 with the help of the dedicated optional H2O2 suction module.
  • Excellent reproducibility thanks to superb thermal homogeneity and process supervision (RSD < 1%).

  • Comprehensive list of reference applications
  • Customized application support
  • Authorized IQ, OQ and PQ documentation
  • Useful tools for application development
  • Practical workshops, trainings and seminars
  • Preventive maintenance including IQ/OQ/PQ
  • Minimize downtime thanks to our service hotline

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