浩瀚色譜（山東）應(yīng)用技術(shù)開發(fā)有限公司建立工作場所空氣中二甲胺的溶劑解吸氣相色譜測定方法。[方法]采用硅膠管吸附空氣中二甲胺,用酸性醇溶液解吸,再用堿性溶液中和后,進樣氣相色譜,使用高液擔(dān)比的堿性色譜柱分離,FID檢測器測定。[結(jié)果]該方法在測定范圍79.7～478.2μg/mL時,線性方程為=1040.2x-25148(r=0.9999)。最低檢出限為5μg/mL;最低檢出濃度為1.3mg/m(3采樣體積7.5L);解吸效率86%～91%;穿透容量7.75mg(200mg硅膠);樣品于4℃冰箱內(nèi)可保存7d。[結(jié)論]本研究建立的方法適合于工作場所空氣中二甲胺濃度的監(jiān)測。
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名稱：HH-Tamine60甲胺專用毛細(xì)管柱
規(guī)格：60m*0.32mm*5.0um
*高使用溫度：280°C
編號：20230929009
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Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has established a solvent desorption gas chromatography method for the determination of dimethylamine in the air of workplaces. [Method] Silica gel tubes were used to adsorb dimethylamine in the air, desorbed with an acidic alcohol solution, neutralized with an alkaline solution, and injected into gas chromatography. A high liquid to liquid ratio alkaline chromatographic column was used for separation, and FID detector was used for determination. [Result] This method is within the measurement range of 79.7 to 478.2 μ At g/mL, the linear equation is=1040.2x-25148 (r=0.9999). The minimum detection limit is 5 μ G/mL; The minimum detectable concentration is 1.3mg/m (3 sampling volumes of 7.5L); The desorption efficiency ranges from 86% to 91%; Penetration capacity 7.75mg (200mg silicone); The sample can be stored for 7 days in a 4 ℃ refrigerator. [Conclusion] The method established in this study is suitable for monitoring the concentration of dimethylamine in the air of workplaces.
Name: HH-Tamine60 Methylamine Special Capillary Column
Specification: 60m * 0.32mm * 5.0um
*High operating temperature: 280 ° C
No.: 20230929009
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