Field determination of VOCs in waste gas of organized emission by portable gas chromatography-mass spectrometry
WEN Xin, DAI Wei, MA Guangjun, SONG Zuhua, YANG Zhengbiao
Nanjing Environmental Monitoring Center of Jiangsu province, Nanjing 210013, China
摘要：建立便携式气相色谱-质谱仪现场测定有组织排放废气中VOCs 的方法。针对固定污染源有组织废气排放的特点，对升温程序、扫描方式、采样方式、进样体积进行了讨论优化，提出了对高、低浓度废气样品测定的解决方案，分析了气袋本底的干扰和去除方式。用所建方法对TO-14 标准气体进行测定，各组分的含量在0.02～1.00 μL/L范围内线性关系良好，相关系数均大于0.990，各组分检出限为0.004～0.014 μL/L。测定结果的相对标准偏差为2.4%～15.3%(n=6)，加标回收率为73.3%～109%。该方法检测时间短，具有良好的精密度和准确度，适用于有组织排放废气中VOCs 测定。
Abstract：The method of field determination of VOCs in waste gas of organized emission by portable gas
chromatography-mass spectrometry was established. According to the characteristics of organized waste gas emission
from fixed pollution sources, the temperature rising program, scanning mode, sampling mode and injection volume
were discussed and optimized. The solutions for the determination of high and low concentration waste gas samples
were proposed, and the interference and removal mode of air bag background were analyzed. TO-14 standard gas was
determined by this method, the content of each component had a good linear relationship in the range of 0.02-1.0 μL/
L, the correlation coefficients were all more than 0.990, and the detection limit of each component was 0.004-0.014 μL/L. The relative standard deviation of determination results was 2.4%-15.3%%(n=6), and the recoveries of standard addition
were 73.3%-109%. This method has the advantages of short detection time, good precision and accuracy, which is suitable
for the determination of VOCs in waste gas of organized emission.
Keywords：portable; gas chromatography-mass spectrometry; organized emission; field determination; volatile
闻欣，戴维，马光军，等. 便携式气相色谱- 质谱法现场测定有组织排放废气中VOCs[J]. 化学分析计量，2020，29(2)：17-22.
WEN X，DAI W，MA G J，et al. Field determination of VOCs in waste gas of organized emission by portable gas chromatography-mass