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工業(yè)甲胺及水溶液測定專用毛細(xì)管柱  測試譜圖：



Special capillary column for industrial methylamine and aqueous solution determination
Special capillary column for industrial methylamine and aqueous solution determination Details:

Name: Quartz Capillary Column
Stationary phase: dedicated
Specification: 60m*0.32mm
Model: HH-Tamine60
Application: Determination of industrial methylamine, dimethylamine, trimethylamine

Methylamine is a basic organic raw material in the chemical industry and is widely used in pesticides, chemical fibers and defense industries. Regarding the analytical method of methylamine aqueous solution, there are already domestic standards to follow. For anhydrous methylamine, because the first boiling point of the sample is low, it is easy to vaporize at room temperature, making it impossible to calibrate with standard samples.

Haohan Chromatography (Shandong) Applied Technology Development Co., Ltd. established a headspace gas chromatography method for the determination of monomethylamine and dimethylamine in the air of workplaces. Methods The monomethylamine and dimethylamine in the air were collected from the acidic absorption solution, neutralized by the alkaline solution, and then sampled in the headspace by gas chromatography. They were separated by a HH-Tamine60 capillary column and measured by a hydrogen flame ionization detector. Results When the concentration range of monomethylamine was 11.70～93.54μg/ml, the regression equation of the standard curve was Y=0.458 1X-1.034 5(r=0.999 0); when the concentration range of dimethylamine was 10.59～84.74μg/ml, the standard curve The regression equation is Y=0.864 5X-2.206 (r=0.999 1). The detection limit of the monomethylamine method is 1.65 μg/ml, and the minimum detection concentration is 0.55 mg/m3 (based on the collection of 15 L air samples); the detection limit of dimethylamine is 1.54 μg/ml, and the minimum detection concentration is 0.32 mg/m3 (calculated based on the collection of 24 L air samples). The samples can be stored stably for 5 days in a refrigerator at 4°C. Conclusion This method can simultaneously determine the concentration of monomethylamine and dimethylamine in the air of the workplace.

Special capillary column for industrial methylamine and aqueous solution determination Test spectrum: