haohan高纯氨中甲烷乙烯乙烷等轻烃测定专用柱应用安捷伦7890上HH-NH3-II

高纯氨（NH₃）是MOCVD（金属有机化学气相沉积）法制备氮化物半导体（如GaN, InGaN）的核心原料之一。其中的痕量轻烃杂质会带来严重问题：
碳污染：烃类在高温下会分解产生碳，掺入半导体晶格，导致晶体缺陷、载流子浓度异常、发光效率下降（LED亮度/波长偏移）。
成核干扰：影响外延生长的成核过程，导致薄膜质量差。
安全性：某些轻烃是易燃易爆气体。
因此，必须将高纯氨中的总烃含量控制在ppb（十亿分之一）甚至ppt（万亿分之一）级别，这就需要高灵敏度的色谱分析手段进行监控。

技术难点与挑战
基体干扰：氨气的浓度极高（99.9999%以上），而目标轻烃杂质含量极低。巨大的浓度差会导致：
色谱柱过载：大量氨气会淹没色谱柱，导致分离效果变差，峰形拖尾严重，掩盖杂质峰。
检测器饱和：特别是对TCD（热导检测器），高浓度氨气会使信号饱和，无法检测到后续流出的痕量组分。
柱效和寿命：氨气具有碱性，可能损害某些色谱柱的固定相。
灵敏度要求高：需要检测至ppb级别，对检测器的灵敏度要求极高。
样品处理：如何将高纯氨样品安全、无污染、不失真地引入色谱仪是关键。

浩瀚色谱（山东）应用技术开发有限公司，研制的《氨中C1-C2测定色谱柱应用岛津GC2014》将氨气（NH₃）基质与各种烃类杂质（如甲烷、乙烷、乙烯、乙炔、丙烷、丙烯等）有效分离，并准确定量。
 

名称：氨气专用柱

型号：HH-NH3-II

规格：2m*1/8，60-80目

zui高使用温度：200°C

应用：高纯氨中甲烷，乙烷，乙烯，乙炔的测定

 

应用：

安捷伦490在线/便携，4890,5890,6890,7820,7890,8860,8890

岛津GC-14C，GC-2010，GC-2014，GC-2030

赛默飞1310,1300,1610,1600

瓦里安3800系列

布鲁克PE580,590,680,690

磐诺A90，福立GC9790，华爱，天瑞，天美，GC7900，川仪，北分瑞利，东西电子，鲁南瑞虹，捷岛/科晓

  High purity ammonia (NH3) is one of the core raw materials for the preparation of nitride semiconductors (such as GaN, InGaN) by MOCVD (metal organic chemical vapor deposition) method. Trace amounts of light hydrocarbon impurities can cause serious problems:
Carbon pollution: Hydrocarbons decompose at high temperatures to produce carbon, which is doped into the semiconductor lattice, leading to crystal defects, abnormal carrier concentration, and decreased luminous efficiency (LED brightness/wavelength shift).
Nucleation interference: affecting the nucleation process of epitaxial growth, resulting in poor film quality.
Safety: Some light hydrocarbons are flammable and explosive gases.
Therefore, it is necessary to control the total hydrocarbon content in high-purity ammonia at the ppb (parts per billion) or even ppt (parts per trillion) level, which requires high-sensitivity chromatographic analysis methods for monitoring.
Technical difficulties and challenges
Matrix interference: The concentration of ammonia is extremely high (above 99.9999%), while the target light hydrocarbon impurity content is extremely low. A significant concentration difference can lead to:
Column overload: A large amount of ammonia will submerge the chromatography column, resulting in poor separation efficiency, severe peak tailing, and masking of impurity peaks.
Detector saturation: Especially for TCD (thermal conductivity detector), high concentrations of ammonia can cause signal saturation, making it impossible to detect trace components that subsequently flow out.
Column efficiency and lifespan: Ammonia gas is alkaline and may damage the stationary phase of certain chromatographic columns.
High sensitivity requirements: It needs to be detected to the ppb level, and the sensitivity of the detector is extremely high.
Sample processing: The key is how to safely, uncontaminated, and undistorted introduce high-purity ammonia samples into the chromatograph.
Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has developed the Shimadzu GC2014 column for the determination of C1-C2 in ammonia, which effectively separates ammonia (NH3) matrix from various hydrocarbon impurities (such as methane, ethane, ethylene, acetylene, propane, propylene, etc.) and accurately determines the amount.
Name: Ammonia dedicated column
Model: HH-NH3-II
Specification: 2m * 1/8, 60-80 mesh
Maximum operating temperature: 200 ° C
Application: Determination of methane, ethane, ethylene, and acetylene in high-purity ammonia
Application:
Agilent 490 online/portable, 48905890689088608890
Shimadzu GC-14C, GC-2010, GC-2014, GC-2030
Thermo Fisher Scientific 1310130016101600
Varian 3800 Series
Brooke PE580590680690
Panno A90, Fuli GC9790, Huaai, Tianrui, Tianmei, GC7900， Chuanyi, Beifen Ruili, Dongxi Electronics, Lunan Ruihong, Jiedao/Kexiao