HH-Tamine30胺类毛细管柱 顶空气相色谱法测工作场所空气中一甲胺、二甲胺

名称：HH-Tamine30毛细管柱

规格：30m*0.32mm*5.0um

高使用温度：280°C

甲胺(Methylamine，CH3NH2)和二甲胺(Dimethylamine，CH3)2NH)均为无色、有特殊气味、属中等急性毒性的物质，水溶液均为中强碱性，在空气中爆炸极限，甲胺为4.9-20.7%(φ)，二甲胺为2.8-14.4%。一甲胺沸点为-6℃，20℃蒸气压为304kPa。二甲胺沸点为6.88℃，20℃时的蒸气压为173.9kPa(1307.2mmHg)。我国研制车间空气中一甲胺和二甲胺的测定方法都为分光光度法，该方法干扰大，不能对一甲胺、二甲胺等同时测定。


浩瀚色谱（山东）应用技术开发有限公司，结合我国国情建立用多孔玻板吸收管吸收液同时采集空气中一甲胺、二甲胺，顶空进样气相色谱毛细管柱分离，FID检测器测定的方法。

顶空气相色谱法测工作场所空气中一甲胺、二甲胺  测试谱图：


Determination of Monomethylamine and Dimethylamine in Workplace Air by Headspace Gas Chromatography

Details of determination of monomethylamine and dimethylamine in the air of workplace by headspace gas chromatography:



Name: HH-Tamine30 capillary column



Specification: 30m * 0.32mm * 5.0um



Maximum operating temperature: 280 ° C



Methylamine (CH3NH2) and dimethylamine (CH3) 2NH（ φ)， Dimethylamine is 2.8-14.4%. The boiling point of monomethylamine is - 6 ℃, and the vapor pressure at 20 ℃ is 304kPa. The boiling point of dimethylamine is 6.88 ℃, and the vapor pressure at 20 ℃ is 173.9kPa (1307.2mmHg). The determination method of monomethylamine and dimethylamine in the air of research and development workshops in China is spectrophotometry. This method has great interference and cannot be used to determine monomethylamine and dimethylamine at the same time.




Haohan Chromatographic (Shandong) Application Technology Development Co., Ltd. has established a method for simultaneous collection of monomethylamine and dimethylamine in the air with the absorption solution of porous glass plate absorption tube, headspace sampling gas chromatography capillary column separation, and FID detector determination based on the national conditions of China.



Test spectrogram of methylamine and dimethylamine in the air of workplace by headspace gas chromatography: