haohan便携甲烷转化炉色谱仪测定环氧乙烷中二氧化碳的含量HH-790CH4-GC

使用带甲烷转化炉的气相色谱法测定工业环氧乙烷中微量二氧化碳的详细技术方案。

这种方法具有高灵敏度、高选择性和良好的准确性，是测定痕量二氧化碳的经典且可靠的方法。
 

方法原理

1. 分离： 样品通过进样阀被载气带入色谱柱。由于环氧乙烷（EO）和二氧化碳（CO₂）的物理化学性质不同，它们在色谱柱中与固定相发生相互作用，从而实现在时间上的分离。

2. 转化： 从色谱柱流出的CO₂进入一个高温的甲烷转化炉（又称镍催化炉）。在催化剂（通常是镍）的存在和高温（约380°C）下，CO₂与氢气（作为反应气或载气的一部分）发生加氢还原反应，被定量地转化为甲烷（CH₄）和水。

   • 反应式： CO₂ + 4H₂ → CH₄ + 2H₂O

3. 检测： 生成的甲烷进入氢火焰离子化检测器（FID） 进行检测。FID对烃类化合物（如CH₄）具有极高的灵敏度，而对CO₂等无机气体响应很弱甚至无响应。通过这个转化过程，将难以被FID检测的CO₂转化为易于被高灵敏度检测的CH₄，从而间接实现了对痕量CO₂的准确定量。
   
    

   浩瀚色谱（山东）应用技术开发有限公司，研制生产《甲烷转化炉色谱仪测环氧乙烷中CO2》：克服了环氧乙烷对二氧化碳的干扰，延长转化炉的使用寿命，效率高，结果满意。

    

    

   名称：甲烷转化炉

   填料：镍触媒”
   规格：HH-790CH4-GC

   应用：GB/T 13098-2006，适用于工业环氧乙烷中二氧化碳的测定

   特点;

   无需改造仪器，直接对接，省时，省力，实现不同规格型号的仪器互联互通

   含进样装置，色谱柱系统，温控系统，可选择中心切割技术，保护催化剂，延长使用寿命。

   可连接安捷伦6890/7890/7820/8860/8890；岛津GC2010/2014/2030；赛默飞1310系列；瓦里安3400系列；PE，布鲁克；磐诺A90系列；北分瑞利3400系列；福立9790系列；川仪，天瑞，天美，华爱，科晓，捷岛，

   4.体积小，方便携带，安装简单：一进，一出2个接口
   

   
   
   
   

   
   Detailed technical scheme for the determination of trace carbon dioxide in industrial ethylene oxide using gas chromatography with methane conversion furnace.
   This method has high sensitivity, high selectivity, and good accuracy, making it a classic and reliable method for determining trace amounts of carbon dioxide.
   Method principle
   Separation: The sample is introduced into the chromatographic column by the carrier gas through the injection valve. Due to the different physical and chemical properties of ethylene oxide (EO) and carbon dioxide (CO ₂), they interact with the stationary phase in the chromatographic column, thereby achieving separation over time.
   Conversion: CO ₂ flowing out of the chromatographic column enters a high-temperature methane conversion furnace (also known as a nickel catalytic furnace). In the presence of a catalyst (usually nickel) and at high temperatures (about 380 ° C), CO ₂ undergoes a hydrogenation reduction reaction with hydrogen gas (as part of the reaction gas or carrier gas), which is quantitatively converted into methane (CH4) and water.
   Reaction equation: CO ₂+4H ₂ → CH ₄+2H ₂ O
   Detection: The generated methane enters the hydrogen flame ionization detector (FID) for detection. FID has extremely high sensitivity to hydrocarbon compounds such as CH ₄, but has weak or even no response to inorganic gases such as CO ₂. Through this conversion process, CO ₂ that is difficult to detect by FID is converted into CH ₄ that is easy to detect with high sensitivity, indirectly achieving accurate quantification of trace CO ₂.
   Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has developed and produced the "Measurement of CO2 in Ethylene Oxide by Methane Converter Chromatography": it overcomes the interference of ethylene oxide on carbon dioxide, prolongs the service life of the converter, has high efficiency, and satisfactory results.
   Name: Methane Converter
   Filler: Nickel Catalyst
   Specification: HH-790CH4-GC
   Application: GB/T 13098-2006, applicable to the determination of carbon dioxide in industrial ethylene oxide
   characteristic;
   No need to modify the instrument, direct docking, saving time and effort, realizing interconnection and intercommunication of instruments of different specifications and models
   Equipped with an injection device, chromatographic column system, temperature control system, and optional central cutting technology to protect the catalyst and extend its service life.
   Can connect to Agilent 6890/7890/7820/8860/8890; Shimadzu GC2010/2014/2030; Thermo Fisher 1310 series; Varian 3400 series; PE， Brooke; Panno A90 series; Northern Raleigh 3400 series; Fuli 9790 series; Chuan Yi, Tian Rui, Tian Mei, Hua Ai, Ke Xiao, Jie Dao,
   4. Small size, easy to carry, simple installation: one in, one out 2 interfaces