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OR-KNA 100 fully-automatic Kjeldahl nitrogen analyzer
In food testing and agricultural labs, nitrogen determination is the bottleneck. The OR-KNA 100 eliminates operator variability from a century-old method.
The Kjeldahl method has long been standard for protein quantification, but its manual steps—acid addition, distillation, titration—introduce error and downtime. The OR-KNA 100 fully automates that sequence via microcomputer control and a color touch screen, reducing a skilled technician’s task to sample loading.
Its engineering targets the method’s failure points. Simultaneous distillation and titration prevents ammonia loss, while intermittent alkali addition makes the acid-base reaction controllable in the absence of steam. Real-time RGB color analysis tracks the endpoint with a stated recovery rate above 99.5 percent.
Safety logic is layered: the instrument monitors distillation flask temperature, cooling water flow, and reagent levels, halting heating if the flask runs dry. ABS engineering plastics and corrosion-resistant internal piping, warranted for three years, suggest a design intended for continuous lab operation.
The unit stores 10,000 test protocols and can transmit sample data via USB or wireless, supporting compliance with 21 CFR Part 11 for regulated industries. This data traceability reduces transcription risk across high-throughput food safety or feed analysis workflows.
For a Chinese manufacturer, building a device that matches the precision of imported systems at a lower price point is less about technical leapfrogging and more about systems integration: combining reliable pneumatics, durable materials, and available sensors into a single automated platform. The OR-KNA 100 is a case study in that industrial capability.
What matters most is repeatability—RSD below 0.5 percent across batches. In a market where product quality certification depends on accurate protein content, that margin translates directly into compliance cost and audit risk.
Why it matters:
Automating the Kjeldahl method removes a common source of lab error and throughput limitation. For food processors and feed mills in China’s expanding quality-control infrastructure, this means faster certification cycles and less reliance on senior technicians.
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