Determination of acrylic acid in workplaceair by on-line methylationgas chromatography

VernacularTitle:工作场所空气中丙烯酸测定的在线甲基化-气相色谱法
Author: Peng WANG ¹ ; Hong REN ; Zhen ZHOU ; Yong HU ; Kang ZHENG ; Yiyao CAO
Author Information

1. 310052　杭州，浙江省疾病预防控制中心
Keywords: Chromatography, gas; Workplace; Methylation; Air; Acrylic acid; Tetramethylamine hydroxide
From: Chinese Journal of Industrial Hygiene and Occupational Diseases 2020;38(12):935-937
CountryChina
Language:Chinese
Abstract: Methods:the samples were absorbed by solvent desorption silica gel tube and desorbed by methanol. Desorption fluid in the injector at 350 ℃ in the presence of an organic alkali tetramethylamine hydroxide (TMAH, 25% methanol) , allowed quantitative analysis of acrylic acid as its corresponding methyl derivative by gas chromatography.Results:calibration curve of the method was linear within the range 0-258.4 mg/L and showed good linearity with r=0.999 4. The determination limit of the method was 0.9 mg/L, and the minimum detection concentration was 0.06 mg/m 3 (collect 15 L air) . The relative standard deviation ( RSD) was 2.2%-2.7% ( n=5) . Recoveries were between 96.9-101.6%. Conclusion:the results prove on-line methylation gas chromatography is an accurate, simple and high sensitive method for determining acrylic acid in workplace air.