产品简介：
意大利VELP是世界的分析仪器制造商，VELP以其和创新力开发和生产了优良的机械和电子产品。VELP从1983年开始设计、生产各种实验室分析仪器。产品涵盖食品及饲料系列、搅拌器系列、环保分析系列等，为客户提供优质、合适的解决方案。VELP杜马斯定氮仪——NDA701是VELP公司根据燃烧法开发出的新的氮/蛋白质快速分析、测定仪！目前VELP是世界上一家拥有凯氏方法和杜马斯方法定氮仪的公司，是整个分析仪器行业的开拓者！ 技术参数：| 功能 | 测定氮/蛋白质含量 |
| 原理 | 高温燃烧 |
| 测定时间 | 仅需 3min |
| 自动化 | 全自动操作 |
| 样品处理 | 无需样品处理 |
| 样品要求 | 均一性要求高 |
| 载气 | He(氦气) |
| 样品量 | 微量分析 |
| 1g | |
| 检测下限 | 0.003mg |
| 重现性 | ＜0.5% |
| 反应温度 | 1200℃ |
| 化学试剂 | 无 |
| 环境污染 | 无 |
| N测定方法 | TCD检测器 |
| 国标规定 | 食品及饲料中蛋白质的检测 |
Brief Introduction:
The new and completely innovative step forward for nitrogen determination by VELP Scientifica. VELP is now able to offer different solutions for nitrogen determination, from the standard Kjeldahl method to the flash of Dumas combustion. In accordance with the Dumas method, NDA 701 is ideal for high throughput, being fully automated and requiring just 3-4 minutes per analysis.
Technical Parameters:| Method of analysis: | Dumas method / Combustion |
| Detector: | Innovative autocalibrating TCD (no need for a reference gas) |
| Sample weight: | Up to 1 g |
| Autosampler capacity: | Up to 116 samples |
| Reproducibility (RSD): | < 0.5% for EDTA standards approx. 100 mg (9.57% N) |
| Recovery : | > 99.5% |
| Detection range: | 0.1 - 200 mg N |
| Detection limit: | 0.003 mg N absolute |
| Combustion temperature: | 1030 °C / 1886 °F |
| Helium (He): | purity 99.999% (grade 5.0) |
| Oxygen (O2): | purity 99.999% (grade 5.0) |
| Compressed air or Nitrogen (N2): | purity 99.6 % (oil and water free) |
| Helium (He) pressure: | 3 bar |
| Oxygen (O2) pressure: | 3 bar |
| Compressed air or Nitrogen (N2) pressure: | 4 bar |
| Interfaces: | USB, RS232 |
| Power: | 1400 W |
| Power supply: | 230 V / 50 - 60 Hz |
| Weight: | 54 kg / 119 lb |
| Dimensions (WxHxD): | 655 x 510 x 410 mm (655 x 690 x 410 mm including autosampler) |
Application:
The NDA 701 is extremely versatile, being suitable for nitrogen and protein determination in several kinds of sample, in accordance with official AOAC, AACC, ASBC, ISO and OIV methods.
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