Introduction
Kjeldahl systems are specialized laboratory instruments designed for the determination of nitrogen content in organic and inorganic samples, particularly in food, agriculture, and environmental analysis. Named after its inventor, Johan Kjeldahl, this method involves a series of chemical reactions where nitrogen is converted into ammonia and then quantified. The system typically consists of a digestion unit, a distillation unit, and titration equipment. In the digestion step, the sample is heated with concentrated sulfuric acid, causing the nitrogen to convert into ammonia. The ammonia is then released through steam distillation and collected in an acidic solution. Finally, the concentration of ammonia is determined by titration with a known solution. Kjeldahl systems offer various automation levels, from manual to fully automated setups, streamlining the time-consuming and labor-intensive Kjeldahl process.
Graphite Kjeldahl Digester T-S211GKD
Graphite Kjeldahl Digester features 20 digestion tube positions, each with a 300mL capacity, for efficient nitrogen analysis. It operates within a temperature range of RT +5 °C to 400 °...
Graphite Kjeldahl Digester T-S210GKD
Graphite Kjeldahl Digester can accommodate 20 digestion tubes, each with a 300 mL capacity, for efficient sample processing. It operates at a maximum temperature of 450 °C, ensuring opti...
Automatic Kjeldahl Distillation Unit T-S210AKD
Automatic Kjeldahl Distillation Unit is adopted with microcomputer-controlled technology to offer manual and automatic mode to meet different experiments need. Features automatic controll...
Semi-automatic Kjeldahl Distillation Unit T-S210SKD
Semi-automatic Kjeldahl Distillation unit is a microprocessor controlled semi-automated distillation unit with precise measurement accuracy. Built in steam generator with automation for d...
Standards
ISO 1871:2009-Food and feed products-General guidelines for the determination of nitrogen by the Kjeldahl method
Complies with the above standards, but is not limited to them.
Features
1. Data and timer options support method records.
2. Integrated heating and control support repeatable procedures.
3. Safety devices protect against overheating and boil-dry.
4. Clear controls show temperature and time.
5. Multiple-position design processes several samples in one run.
FAQ
What are the main applications of the Kjeldahl System?
The Kjeldahl System is used for a defined chemical preparation step such as digestion, extraction, evaporation or distillation. It supports analytical, environmental, food, pharmaceutical and teaching laboratories following standard procedures.
What standards does the Kjeldahl System comply with?
The apparatus is designed with reference to IEC 61010 electrical safety and relevant ISO and GB/T standard methods for the specific procedure. Glassware and heating must match the method. Compliance documentation can be provided on request.
What does the warranty cover?
The system is covered for 12 months after shipment, including the main mechanism and electrical controls. Replaceable consumables and routine service items are not part of the warranty. Faults caused by improper installation outside the manual or unauthorised modification are not covered.
How easy is the Kjeldahl System to use?
The controls are designed for regular laboratory use, so most users become confident after a brief introduction. The manual walks through each step, and common settings can be saved for repeat work. Online or on-site training is available if the site requires it.
What is the typical lead time for order delivery?
Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.
How often should the Kjeldahl System be calibrated?
Factory calibration is included, and routine verification is recommended every 6 to 12 months using suitable reference materials. Regulated sites may require more frequent checks and documented records. Calibration support and certificates can be provided on request.
Where do we get replacement parts?
The instrument uses standard, widely available consumables rather than special locked items. Replacement parts, accessories and consumables can be ordered from us against the model number. We keep common service parts in stock for prompt supply.
Are options or configurations available?
A range of options is available to match the application, such as alternative settings, fittings, data outputs or power supply. We confirm each option and its effect on price and schedule up front. Larger custom builds can be discussed.
Do you provide on-site installation?
Most models can be commissioned by following the manual, including positioning, connections, checks and a first test run. Remote guidance is available during start-up. On-site installation, commissioning and training can be arranged separately where required.
What should be avoided when using the Kjeldahl System?
Do not use incompatible or damaged glassware, exceed temperature or pressure limits or work without ventilation for fuming samples. Follow the standard method and safety rules.
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