Nitrogen Determinator
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| Brand | DELEITE |
|---|---|
| Origin | Shanghai, China |
| Model | AKN-3240 |
| Automation Level | Fully Automated |
| Nitrogen Determination Range | 0.01–240 mg N per sample |
| Distillation Time | 0–9 min/sample |
| Titration Precision | RSD < 0.0012 µL/step |
| Minimum Titration Volume | 1–20 µL/step (auto-adjusted based on standard acid concentration) |
| Recovery Rate | >99.5% |
| Power Adjustment Range | 0–1500 W |
| Linearity | RSD <1.0% across 1× to 4× sample mass (same matrix) |
| Repeatability (RSD) | <0.5% |
| Digestion Tube Compatibility | Ø42 × 300 mm (supports both 300 mL and 650 mL tubes) |
| Data Storage Capacity | ≥200,000 sample records (≥7 years at typical lab throughput) |
| Compliance | Supports audit-trail-enabled operation per GLP/GMP requirements |
| Brand | EuroVector |
|---|---|
| Origin | Italy |
| Model | EA3017 |
| Analysis Principle | Dumas Combustion Method |
| Automation Level | Fully Automated Nitrogen Determinator |
| Nitrogen Range | 0–100% |
| Repeatability | ±0.5% RSD |
| Sample Mass Capacity | ≤5 g (solid) |
| Dimensions (L×W×H) | 480 mm × 480 mm × 600 mm |
| Brand | FOSS |
|---|---|
| Origin | Denmark |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Determination Range | 0.1 – 210 mg N |
| Distillation Flow Rate | ~40 mL/min |
| Repeatability | ≤1% RSD |
| Recovery Rate | >99.5% (for 1–200 mg N) |
| Power Consumption | 3000 W |
| Dimensions (L×W×H) | 500 mm × 480 mm × 760 mm |
| Brand | FOSS |
|---|---|
| Origin | Denmark |
| Model | Kjeltec™ 9 Distillator |
| Instrument Type | Kjeldahl Nitrogen Distillation Unit |
| Automation Level | Semi-Automatic |
| Nitrogen Determination Range | 0.1–210 mg N |
| Distillation Time | 3.5 min |
| Repeatability | ±1% RSD |
| Sample Weight Capacity | Solids: 0.2–2 g |
| Semi-solids | 2–5 g |
| Liquids | 10–25 g |
| Nitrogen Recovery Rate | >99.5% |
| Power Rating | 3000 W |
| Dimensions (L×W×H) | 500×480×790 mm |
| Brand | FOSS |
|---|---|
| Origin | Jiangsu, China |
| Instrument Type | Automated Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Model | SINO KT8400 |
| Compliance Standards | AOAC, EPA, DIN, ISO |
| Sample Throughput | Compatible with 20-position autosamplers (e.g., FOSS 8420/8460) |
| Safety Features | SAFE™ steam-controlled distillation, interlocked transparent safety door, integrated temperature-controlled distillate cooling |
| Software Options | FOSS Compass LIMS-ready software with GLP-compliant audit trail, network printer/tare balance integration |
| Brand | Hengmei |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Automated Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Measurement Range | 0.1–240.0 mg N |
| Repeatability | ≤0.5% RSD (parallel determinations) |
| Sample Weight Capacity | ≤8.0 g (solid), ≤30.0 mL (liquid) |
| Nitrogen Recovery Rate | 99–101% |
| Power Consumption | ≤1500 W |
| Brand | Kaiyuanhongsheng |
|---|---|
| Origin | Hunan, China |
| Model | TN3000 |
| Principle | Dumas combustion method |
| Nitrogen range | 0.1–200 mg N |
| Sample mass | 0.01–0.5 g |
| Repeatability | RSD ≤ 0.5% at 10 mg N |
| Recovery rate | ≥ 99.5% |
| Power consumption | ≤ 3000 W |
| Dimensions (L×W×H) | 500 × 465 × 485 mm |
| Sample capacity | 120-position auto-sampler |
| Analysis time per sample | ≤ 3 min |
| Carrier gas | CO₂ (≥99.99%) |
| Oxidant | O₂ (≥99.99%) |
| Reduction medium | High-efficiency Cu furnace (≥5000 cycles) |
| Gas sampling | Six-way valve quantitative injection |
| Leak detection | Automatic & manual modes |
| Gas flow & pressure monitoring | Real-time display |
| Origin | Shanghai, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (PRC) |
| Model | KDN-08A |
| Price | USD 1,140 (FOB Shanghai) |
| Sample Throughput | 8 samples per digestion cycle |
| Digestion Time | ~40 min |
| Nitrogen Range | 0.02–95% (or 0.1–200 mg N per sample) |
| Power Supply | AC 220 V, 50 Hz |
| Digestion Unit Power | 2400 W |
| Distillation Unit Power | 800 W |
| Dimensions (Digestion Unit) | 730 × 300 × 150 mm |
| Dimensions (Distillation Unit) | 380 × 330 × 820 mm |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Regional Classification | Domestic (China) |
| Model | Leici KDN-1 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Determination Range | 0.1 mg – 240 mg N |
| Steam Distillation Time | Programmable up to 60 min |
| Sample Weight Capacity | ≤6 g (solid), ≤16 mL (liquid) |
| Nitrogen Recovery Rate | ≥99.5% |
| Power Consumption | 1.3 kW |
| Dimensions (L×W×H) | 400 mm × 385 mm × 735 mm |
| Brand | Peiou |
|---|---|
| Origin | Shanghai, China |
| Model | SKD-100 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Semi-Automated |
| Nitrogen Determination Range | 0.1–240 mg N |
| Sample Weight Capacity | ≤5 g (solid) / ≤15 mL (liquid) per sample |
| Alkali/Acid Addition Time Control | 0–99 s (segmented) |
| Distillation Time Setting | 0–99 min |
| Distillation Rate | 14–28 mL/min |
| Power Adjustment Range | 750–1500 W |
| Recovery Rate | >99.5% |
| Repeatability | RSD ≤0.5% |
| Dimensions (L×W×H) | 370×300×680 mm |
| Net Weight | 15 kg |
| Display | LED digital |
| Data Storage | 10 programmable distillation/alkali addition methods |
| Safety Features | Real-time liquid level monitoring, overpressure protection, dry-run prevention, emergency stop |
| Housing Material | Molded ABS engineering plastic (acid/alkali resistant) |
| Tubing | PEIU proprietary corrosion-resistant high-temp tubing |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Water Supply Requirement | ≥0.15 MPa pressure, ≤20 °C inlet temperature |
| Brand | Peiou |
|---|---|
| Origin | Shanghai, China |
| Model | SKD-1000 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Determination Range | 0.1–200 mg N per sample |
| Distillation Time | 3–8 min per sample |
| Repeatability | ≤ ±0.5% RSD |
| Sample Weight Capacity | Solids 0.1–2 g |
| Nitrogen Recovery Rate | ≥99.5% |
| Power Consumption | ~1500 W |
| Dimensions (L×W×H) | 450 × 400 × 550 mm |
| Linear Range | 0.1–200 mg N |
| Linearity Error at 4× Nitrogen Load | ≤ ±1% |
| Compatible Standard Acid Concentrations | 0.01–0.5 mol/L HCl or H₂SO₄ |
| Titration Resolution | 0.8 µL/step |
| Acid Delivery Precision | ≤0.002 µL/step |
| Alkali Addition | Programmable segmented dosing (1–10 pulses, 0–15 s interval) |
| Delay Time Setting | 0–1800 s (for nitrate-nitrogen analysis) |
| Reagent Pump Volume Range | 0–150 mL (1 mL increments) |
| Steam Power Adjustment | Continuously variable |
| Safety Features | Dual-level steam chamber monitoring, condensate flow interruption protection, door interlock sensing, real-time cooling water pressure/flow detection, reagent level monitoring, and jacket temperature control |
| Brand | Peiou |
|---|---|
| Origin | Shanghai, China |
| Model | SKD-1100 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Determination Range | 0.1–200 mg N |
| Linear Range | 0.1–200 mg N |
| Sample Weight (Solid) | 0.1–5 g |
| Distillation Time per Sample | 3–5 min |
| Repeatability | ≤0.5% CV |
| Recovery Rate | ≥99.5% |
| Power Consumption | ~800 W |
| Dimensions (L×W×H) | 450 × 350 × 500 mm |
| Brand | Peiou |
|---|---|
| Origin | Shanghai, China |
| Model | SKD-1800 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Determination Range | 0.1–240 mg |
| Distillation Time per Sample | 3–8 min |
| Repeatability (RSD) | ≤0.5% |
| Sample Weight Capacity | ≤5 g (solid) or ≤15 mL (liquid) |
| Nitrogen Recovery Rate | ≥99.5% |
| Power Consumption | 750–1500 W |
| Dimensions (L×W×H) | 370 × 300 × 680 mm |
| Linearity Range | 0.1–240 mg nitrogen |
| Brand | Peiou |
|---|---|
| Origin | Shanghai, China |
| Model | SKD-2000 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Determination Range | 0.1–300 mg N |
| Sample Weight Capacity | Solids 0.1–5 g |
| Distillation Time per Sample | 2–6 min |
| Repeatability | ≤ ±0.3% RSD |
| Recovery Rate | ≥99.8% |
| Linearity Range | 0.1–300 mg N |
| Linearity Error at 4× Nitrogen Load | ≤ ±0.8% |
| Compatible Standard Acid Concentration | 0.01–1.0 mol/L HCl or H₂SO₄ |
| Power Consumption | ~1800 W |
| Dimensions (L×W×H) | 500×450×600 mm |
| Titration Precision | ±0.15% |
| Adjustable Alkali Addition Steps | 1–10 segments with 0–15 s intervals |
| Delay Time Setting | 0–1800 s |
| Reagent Pump Volume Range | 0–150 mL (1 mL resolution) |
| Distillation Steam Continuity | Continuous steam generation with auto-refill without interruption |
| Brand | Peiou |
|---|---|
| Origin | Shanghai, China |
| Model | SKD-5000 |
| Instrument Type | Fully Automated Kjeldahl Nitrogen Determinator |
| Nitrogen Determination Range | 0.1–500 mg N per sample |
| Cation Exchange Capacity (CEC) Range | 1–100 cmol/kg |
| Sample Weight | Solid (e.g., soil): 0.5–10 g |
| Liquid | 1–100 mL |
| Distillation Time | 2–5 min per sample |
| Repeatability | ≤±0.2% for nitrogen |
| Recovery Rate | ≥99.8% for nitrogen |
| Linear Range | 0.1–500 mg N |
| Linearity Error at 4× Nitrogen Load | ≤±0.5% |
| Compatible Standard Acid Concentration | 0.01–1.5 mol/L HCl or H₂SO₄ |
| Power Consumption | ~2000 W |
| Dimensions (L×W×H) | ~550×500×650 mm |
| Titration Resolution | 0.8 µL/step |
| Pump Accuracy | RSD <0.002 µL/step |
| Repeatability (RSD) | <0.5% |
| Delay Time Setting | 0–1800 s |
| Digestion Tube Compatibility | 300 mL and 650 mL tubes |
| Dual-Mode Operation | Manual & Automatic |
| Distillation Power | Adjustable |
| Safety Features | Real-time distillation cup temperature monitoring, condenser water flow/pressure auto-detection, acid/alkali/boric acid/diluent level sensors, door-closed status verification, dry-burn prevention via dual liquid-level modeling |
| Brand | Sonnen |
|---|---|
| Origin | Shanghai, China |
| Model | K12 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Determination Range | 0.1–240 mg N per sample |
| Distillation Time (Ammonium Nitrogen) | 3–7 min/sample |
| Repeatability | ≤0.5% RSD |
| Sample Weight Capacity | ≤6 g (solid), ≤25 mL (liquid) |
| Recovery Rate | ≥99.5% |
| Linearity | RSD ≤1% over 1–3× nitrogen concentration range in digestion tube |
| Power Consumption | 1800 W |
| Dimensions (L×W×H) | 460 × 450 × 720 mm |
| Titration Resolution | 0.1 µL/step |
| Internal Data Storage | 1,000,000 test records |
| User-Defined Methods | 500 |
| Cooling Water Flow | 0.5 L/min (at 15 °C), 1.5 L/min (at 25 °C) |
| Compliance | ISO 9001 certified, CE marked |
| Brand | Teledyne Leeman Labs |
|---|---|
| Origin | Beijing, China |
| Instrument Type | Dumas Combustion Method |
| Automation Level | Fully Automated |
| Model | EA3507 |
| Compliance | ASTM D515, ISO 14891, AOAC 992.15, EN ISO 16634-1:2021 |
| Detection Principle | Thermal Conductivity Detection (TCD) of N₂ after catalytic combustion and reduction |
| Sample Form | Solid or liquid |
| Typical Analysis Time | < 5 min per sample |
| Nitrogen Range | 0.01–100 mg N |
| Precision | RSD ≤ 0.5% (n = 10, 10 mg N standard) |
| Brand | Thermo Fisher |
|---|---|
| Origin | Italy |
| Instrument Type | Dumas Combustion Method |
| Automation Level | Fully Automated Elemental Analyzer |
| Nitrogen Measurement Range | 0.001–500 mg N |
| Reproducibility | <0.3% RSD |
| Sample Mass Requirement | ≥1 g |
| Recovery Rate | 99.5–100% |
| Digestion/Combustion Time | 3–4 min per sample |
| Linear Range | 0.001–500 mg N |
| Power Consumption | 1400 W |
| Dimensions (L×W×H) | 620 × 580 × 500 mm |
| Sample Capacity | Up to 125 positions (with optional 4-position carousel) |
| Compliance | ASTM D5142, AOAC 992.15, ISO 14891, EN ISO 16634-1/-2, USP <28>, FDA 21 CFR Part 11 ready (via EagerSmart software audit trail) |
| Brand | Thermo Fisher |
|---|---|
| Origin | Italy |
| Instrument Type | Dumas Combustion Method |
| Automation Level | Fully Automated Nitrogen Determinator |
| Nitrogen Range | 0.001–500 mg N |
| Reproducibility | <0.3% RSD |
| Sample Weight | ≥1 g |
| Recovery Rate | 99.5–100% |
| Digestion/Combustion Time | 3–4 min per sample |
| Power Consumption | 1400 W |
| Dimensions (L×W×H) | 620 × 580 × 500 mm |
| Linearity Range | 0.001–500 mg N |
| Sample Capacity | Up to 125 positions (with optional multi-rack configuration) |
| Gas Flow Control | Electronic Flow Control (EFC) |
| Software Platform | EagerSmart™ Operating Software |
| Compliance | ASTM D515, ISO 13878, AOAC 992.15, USP <467>, EN ISO 13878, and GLP/GMP-ready audit trail support |
| Brand | Xianjian |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Measurement Range | 0.1–240.0 mg N per sample |
| Distillation Time | 3–8 min per sample |
| Accuracy | Relative Error ≤ 0.3% |
| Repeatability | Parallel Difference ≤ 0.2% |
| Sample Weight Capacity | ≤ 8.0 g (solid), ≤ 30.0 mL (liquid) |
| Nitrogen Recovery Rate | ≥ 99.5% |
| Power Consumption | 1700 W |
| Dimensions (L×W×H) | 580 × 430 × 750 mm |
| Brand | Zhiyue Instrument |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Region of Origin | Domestic (China) |
| Model | KDN-380F |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Semi-Automatic |
| Nitrogen Determination Range | 0.1–240 mg N |
| Sample Weight Capacity | Solids 0.3–8.0 g |
| Distillation Time | 5–8 min per sample |
| Repeatability | ±0.3% RSD |
| Recovery Rate | ≥99.5% |
| Power Rating | 1300 W |
| Dimensions (L×W×H) | 420 × 340 × 710 mm |