湖南氧氮氢分析仪哪家好

Sample Preparation

Sampling and sample preparation is an important issue because traditional methods used to obtain samples for oxygen and nitrogen determination are different from those recommended for hydrogen, especially when sampling molten metal. The main difference in steel sampling procedures for oxygen/nitrogen and hydrogen is due to the mobilityof hydrogen. Special precautions must be used when sampling for hydrogen. From molten steel and iron, a sample must be quickly quenched in cold water and chilled in a refrigerant such as liquefied nitrogen or a mixture of acetone and solid carbon dioxide in order to reduce losses of hydrogen from diffusion. Losses of oxygen and nitrogen from diffusion are not a problem. A sample that is taken for hydrogen and

chilled in a refrigerant can also be used for oxygen and nitrogen determination. However, a sample that is typically taken for oxygen and/or nitrogen determination is not suitable for hydrogen determination due to hydrogen loss (diffusion). Surface contamination must be removed by filing or light grinding, using care not to overheat the sample.

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Procedure – Powder/Chip Samples

Instrument calibration/drift correction.

Add approximately 0.05 g of *** Graphite Powder to a***Graphite Crucible.

Firmly place the crucible on the lower electrode tip or appropriate autoloader position.

Press the Analyze button on the instrument screen,the lower electrode will close and the analysis sequence will start and end automatically.

Repeat steps 3b through 3i a minimum of three times for each calibration/drift standard used.

Instrument Highlights and Features

Features and Benefits

LED light ring illuminates the furnace area

Choice of either argon or helium carrier gas

Novel electrode design increases heat transfer efficiency for increased stability

Non-touch interface systems are also available

User-friendly brand software

High-Performance Detector Design

Thermostatic construction provides increased protection from ambient temperature fluctuations

Optimized emitter control and detection circuitryimproves the IR cell lifetime and long-term stability,

resulting in superior accuracy and precision

Infrared detection for the determination of oxygen, thermoconductivity detection for the determination

of nitrogen

氧氮氢分析仪的原理：分析样品在惰性气流存在下于石墨坩埚中加热熔融，其中脉冲炉温度可自由设定，并通过一个非接触式的光学温度传感器进行实时监控，用于实现样品的完全分解，反应所生成的CO H2和N2被带入到具有高稳定性和灵敏度的检测系统进行检测。对于CO的检测采用的是非色散性红外检测器，对于N2和H2的检测则采用热导检测器。

氧氮氢分析仪的特点：快速准确分析，自动化操作；精密气体校准；CO红外检测器，高分辨率和重现性的N、H热导池检测器；同一台仪器实现熔融提取和热提取；热提取分析时间可调；可自由选择温度*高达2500 °C；光学温度计温度测定和控制；所有检测器自动调零/自动水平控制（ALC）；数据评估的自动优化选择范围；炉自动清洁和坩埚自动进样（可选）；外设电脑进行操作和控制；样品信息保存； 所有样品数据可追踪查询；通过FTP或本地局域网进行数据传输； ON，H分析轻松切换。

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Procedure - Solid Samples

Prepare the instrument as outlined in the operator's instruction manual.

Determine the instrument blank.

Login a minimum of 3 Blank replicates.

Press the Analyze button on the instrument screen. After a short delay, the loading head slide-block will open. Place a 502-344 Nickel Basket into the loading head.

Note: samples using automation should be placed in the appropriate autoloader position before starting the

analysis sequence. Once the sequence has started, the automatic analysis will start and end automatically.

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力可ONH836氧氮氢分析仪

特点和优势

国际**的非色散红外及热导检测器 ，无移动部件，不需要手动调整

采用三个**的红外器检测氧含量，同时检测CO和CO2，然后在转化为CO2集中检测，原理上是**完善的，所以不仅可以保证中间量程的测量精度，在**含量和高含量的检测范围内同样可以满足精度要求

高性能的红外检测器配置***恒温绝热技术，消除了外界环境温度的干扰

长寿命的红外发射光源和无漂移的电路设计保证检测器的长期稳定性

力可**的动态流量补偿控制DFC系统，保证了流量系统的完善，可以精确控制整个气路中的流量，保持流量恒定**改善了材料中氮分析的准确度

可以旁路的OMI-2 气路强化过滤装置增强了检测器的稳定性，使得分析结果更加准确

可选自动功能

20位试样自动进样系统

通用下电极坩埚支座，容纳各种坩埚使用

无需人工干预的全自动清扫系统

湖南氧氮氢分析仪哪家好