BUCHI Update on SARS-CoV2 (Corona)
Read Now close

K-436 and K-355 for nitrogen analysis of pharmaceutical excipients

“Since the system is automated, other jobs in the laboratory can be done while digestion is taking place. The distillation unit has also shown to give good recoveries and precision.”

14_PH-130_Nitrogen analysis of pharmaceutical excipients


Customer name

P. Shah, Analytical chemist

Company / Institution

Butterworth Laboratories, United Kingdom


The BUCHI K-355 distillation unit in combination with the K-436 SpeedDigester provides an integrated solution that meets Butterworth’s customer’s requirements.

Product lines



Set new standards in terms of digestion speed, flexible use and result reproducibility with the IR SpeedDigester. Achieve an increased sample throughput for nitrogen determination by Kjeldahl digestion and multiply instrument functionality whenever needs are changing.

Solution «Kjeldahl Basic»

Solution «Kjeldahl Basic»

You look for a cost-effective product for basic nitrogen determination according to Kjeldahl with straightforward operation. We provide an entry-level solution with little need for sophisticated programming or automated titration but with various options to extend the scope of applications.