名稱：玻璃柱
固定相：PEG-20M:KOH:Chromosorb 102=4:1:100
規(guī)格：2m*3mm

應(yīng)用：工作場所空氣有毒物質(zhì)測定 第227部分：一甲胺和二甲胺

工作場所空氣有毒物質(zhì)測定 第227部分：一甲胺和二甲胺
本部分規(guī)定了工作場所空氣中一甲胺和二甲胺的溶液采集-氣相色譜法和溶劑解吸-氣相色譜法。
本部分適用于工作場所空氣中氣態(tài)一甲胺和二甲胺濃度的測定。

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一甲胺,二甲胺的頂空氣相色譜測定方法。方法酸性吸收液采集空氣中的一甲胺、二甲胺,堿溶液中和后頂空進(jìn)樣氣相色譜,經(jīng)玻璃填充色譜柱分離,氫焰離子化檢測器測定。結(jié)果一甲胺濃度范圍為11.70～93.54μg/ml時(shí),標(biāo)準(zhǔn)曲線回歸方程為Y=0.458 1X-1.034 5(r=0.999 0);二甲胺濃度范圍為10.59～84.74μg/ml時(shí),標(biāo)準(zhǔn)曲線的回歸方程為Y=0.864 5X-2.206(r=0.999 1)。一甲胺方法檢出限為1.65μg/ml,低檢出濃度為0.55 mg/m3(以采集15 L空氣樣品計(jì));二甲胺檢出限為1.54μg/ml,低檢出濃度為0.32 mg/m3(以采集24 L空氣樣品計(jì))。樣品于4℃冰箱內(nèi)可穩(wěn)定保存5 d。結(jié)論該方法可同時(shí)測定工作場所空氣中一甲胺和二甲胺濃度。

工作場所空氣有毒物質(zhì)測定一甲胺和二甲胺  測試譜圖：



Determination of Toxic Substances in Workplace Air for Monomethylamine and Dimethylamine
Determination of Toxic Substances in Workplace Air for Monomethylamine and Dimethylamine Details:

name: glass column
Stationary phase: PEG-20M:KOH:Chromosorb 102=4:1:100
Specifications: 2m*3mm

Application: Determination of Toxic Substances in Workplace Air Part 227: Monomethylamine and Dimethylamine

Determination of Toxic Substances in Workplace Air Part 227: Monomethylamine and Dimethylamine
This section specifies the solution collection of monomethylamine and dimethylamine in workplace air - gas chromatography and solvent desorption - gas chromatography.
This section applies to the determination of gaseous monomethylamine and dimethylamine concentrations in workplace air.

Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has established a headspace gas chromatography method for the determination of monomethylamine and dimethylamine in workplace air. Methods The monomethylamine and dimethylamine in the air were collected from the acidic absorbing liquid, neutralized by the alkali solution, and then injected into the headspace by gas chromatography. 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 of is Y=0.864 5X-2.206 (r=0.999 1). The detection limit of monomethylamine method is 1.65μg/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 1.54μg/ml, and the minimum detection concentration is 0.32 mg/m3 (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 The method can simultaneously determine the concentrations of monomethylamine and dimethylamine in the workplace air.

Determination of Monomethylamine and Dimethylamine for Toxic Substances in Workplace Air Test Spectrum: