Digestion Block for Kjeldahl Digestion

BD50 & BD28 Digestion Block

Digestion Block SystemThe SEAL Analytical Digestion Block is your key to successful kjeldahl digestions.  The BD50 Digestion Block automates acid digestions for up to 50 laboratory samples simultaneously. It is ideal for Total Nitrogen (TKN) and Phosphorous (TP) digestion. The SEAL Analytical Digestion Block uses a microprocessor to precisely control digestion conditions guaranteeing reproducible digestions, completely unattended even overnight. A Digestion Block will relieve staff from long digestion processes and prepare samples for analysis in advance of your workday, significantly improving laboratory productivity. The solid high-grade aluminium block, encased in a stainless steel housing, ensures an acid resistant and very low maintenance block digester. Users can control temperatures, program digestion methods, pause steps and detect errors through the separate, programmable, acid resistant Controller. The addition of a Block Digester to your laboratory will reduce manual handling, improve safety, increase productivity and improve the quality of your digestions irrespective of the operator or the batch. The SEAL Analytical Digestion Block is used for a variety of applications including TKN and TP digestions on, environmental, food, pharmacy, chemistry and biochemistry samples.



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SEAL Digestion Block System Advantages

  • Small footprint, saves fume hood space
  • BD50 accepts: 50 x 75 ml tubes, 50 x 100ml tubes,
  • BD28 accepts 28 x 250ml tubes (larger vial ideal for soil digestion)
  • Compact system includes:digestion block unit, separate microprocessor controller, tube rack/ draft shield, a set of digestion vessels, integrated cooling stand.
  • Manufactured from solid aluminium, encased in stainless steel, for acid and corrosion resistance
  • Inert glass digestion tubes
  • Unique flat plate design eliminates temperature variation across the digestion block
  • Automate and replicate even the most complex digestion processes with 20 digestion methods of up to 30 steps programmable
  • Separate controller to protect the electronics and the operator from acid fumes.
  • Digests will be held and samples protected even during a power failure.
  • Safety cut out to protect from overheating.
  • Pre-heating/ standby heating allows quick start runs

The SEAL Digestion Block System is Ideal For:

  • Total Kjeldahl Nitrogen
  • TKN Digestion Block
  • Total Phosphorous TP
  • Metals
  • Mercury
  • Chemical Oxygen Demand (C.O.D) and more

Optional Accessories

  • Tear Drop Stoppers for the digestions tubes to reduce cross contamination and acid loss
  • Splash Head for the safe addition of reagents during the digestion process.
  • Straight sided or volumetric glass digestion tubes 

Digestion Block Model Options

  • BD50 accepts: 50 x 75 ml tubes or 50 x 100ml tubes,
  • BD28 accepts 28 x 250ml tubes (larger vial ideal for soil digestion)


Contact SEAL Analytical or find a distributor near you.

Digestion Block Accessories

Kjeldahl Digestion Granules

  • Non-selenized granules
  • High purity, white, amphoteric alundum
  • Extremely hard porous surface
  • Will not crumble or "powder" in the Kjeldahl Digestion process.
  • Four mesh granule size
  • Specific gravity 3.97
  • Available in 100 gm and 500 gm size.

Seal Block Digestion System Tube Rack

Tube Rack / Draft Shield

  • Models for  50 or 28 tubes
  • Stainless Steel for maximum life
  • Use multiple racks to prepare sample batches (Kjeldal Digestion)
  • Keeps radiated heat around the tubes during digestion

Block Digestion Flat Plate Design

Unique Flat Plate Design

  • Evenly distributes heat
  • No Hot and Cold spots
  • Allows uniform digestion across the block

Block Digestion System Tubes with Tear Drop Stoppers

Tear Drop Stoppers

  • Capture and re-condense digest fumes
  • Reduce acid loss
  • Reduce cross contamination
  • Reduce splatter


Block Digestion System - Digest Tubes

Digestion Tubes

  • Straight Sided OR
  • Volumetric with constricted top and Class "A" calibration mark
  • 250 ml (BD28)
  • 75 ml (BD 50)
  • 100 ml (BD50)

Block Digestion System Cooling Stand

Cooling Stand

  • Holds tubes above the Block for rapid cooling
  • Works with either BD28 or BD50
  • Stainless steel construction for long life

Hot Block Digestion Splash Heads

Splash Head

  • Add reagents safely during the digestion process
  • Works for BD28 - 250 ml tubes and BD50 - 100ml tubes