TKN Systems Product Lines:
High Temperature TKN Systems perform the Kjeldahl digestion process automatically for TKN. These durable, well-made blocks heat up quickly for optimum performance. As many as 20 applications, including TKN, can be stored in the easily programmable controller. To perform TKN, the controller is programmed to ramp the temperature of the block to 160°C and hold that temperature for 60 minutes. Then the block temperature automatically elevates to 380°C and remains at that temperature for 90 minutes. At that point the block shuts off to end the digestion. Other high temperature digestions are programmed just as easily for temperature, ramp rate and hold times. Up to 30 steps can be incorporated for each digestion procedure. To withstand the highly corrosive nature of the TKN procedure, the high temperature block is encased with 316 stainless steel rather than painted or powder coated metal. The tube stand and cooling rack are also 316SS. The controller is remote from the block itself and should be placed outside the fume hood to reduce the likelihood of acid damage. Two capacities of TKN Blocks are available. A 50 position model for use with 100mL digestion tubes or a 28 position model for use with 250mL digestion tubes.