KjelDigester K-446 / K-449

The BUCHI KjelDigester K-446 and K-449 are block digestion systems built for fast, safe and reproducible sample preparation prior to Kjeldahl nitrogen determination. Up to 20 samples are digested in parallel, delivering throughput of up to 120 samples per working day. Improved thermal homogeneity, an accelerated heating and cooling cycle and an enhanced sealing system reduce total analysis time by up to two hours while keeping fume management safe and clean. Both units integrate seamlessly with KjelSampler K-376/K-377 autosamplers for fully automated Kjeldahl workflows.

Key specifications:

• Sample positions: 20

• Temperature control range: 30 - 450 °C

• Maximum temperature: 450 °C

• Throughput: up to 120 samples per working day

• Accelerated heating and cooling – up to 2 hours saved per run

• Enhanced sealing system for safe fume management

• Compatible with KjelSampler K-376/K-377 for full automation

Available models:

• KjelDigester K-446 – manual model with manual rack handling; optional condensate trap

• KjelDigester K-449 – automated model with automatic lift, programmable temperature/time profiles, integrated scrubber control and delayed start for unattended runs

Applications:

• Total Kjeldahl Nitrogen (TKN) and protein determination in food and beverages

• Feed and forage nitrogen analysis

• TKN determination in wastewater and environmental samples

• Fertilizer and chemical industry nitrogen assays

• Compliant with AOAC, ISO and EN reference methods