The DURABLOCK digestion systems are designed for metals and mercury sample digestions that use concentrated acids such as HCl, HNO3 and aqua regia. The blocks are PTFE coated graphite and accommodate a wide range of vial sizes.  The system provides unparalleled value and ease of operation in performing a multi-step, variable temperature profile for digestions. The DURABLOCK is available with wireless technology to allow the user to control up to 8 digestion blocks simultaneously.



  • Available in two block sizes; Standard and Large
  • Standard configurations: 15 ml, 25 ml, 50 ml, and 100 ml vial wells
  • Large configuration: 50 ml and 100 ml vial wells
  • Complete flexibility – a variety of vials and liners can be used
  • Capable of accepting microwave digestion PTFE liners for pre and post digestion treatment of samples
  • Only block that reaches higher temperatures (up to 230C) for tri-acid treatment
  • Thermally secured from 5 sides which conserves energy
  • Adequate sample handling capacity allows individual control over diverse groups of samples in multiple blocks, resulting in increased lab efficiency
  • Customized blocks are available


  • Wireless control minimizes the time spent leaning over the instrument
  • Reduces cables and electronics in the acid fume hood
  • Up to eight blocks can be simultaneously operated using one Controller
  • Each block runs its own temperature profile
  • Can store unlimited number of programmed digestion methods
  • Each method may have up to four ramp/hold digestion steps
  • Provides real time sample or block temperature regulation
  • Overheat prevention safety feature
  • NIST traceable system calibration built into software


  • US EPA Methods: 200.2, 200.7, 200.8, 3050B, 245.1, SW846 (7470A, 7471B)
  • Soil, sludge, drinking water, waste water, fertilizer, feed, plant tissue, ores