当前位置:
X-MOL 学术
›
Environ. Sci. Technol. Lett.
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A New Portable Instrument for Online Measurements of Formaldehyde: From Ambient to Mobile Emission Sources
Environmental Science & Technology Letters ( IF 10.9 ) Pub Date : 2020-04-20 , DOI: 10.1021/acs.estlett.0c00169 Manni Zhu 1 , Huabin Dong 2 , Fei Yu 3, 4 , Songdi Liao 1 , Yan Xie 1 , Junwen Liu 3, 4 , Qinge Sha 3, 4 , Zhuangmin Zhong 3, 4 , Limin Zeng 2 , Junyu Zheng 3, 4
Environmental Science & Technology Letters ( IF 10.9 ) Pub Date : 2020-04-20 , DOI: 10.1021/acs.estlett.0c00169 Manni Zhu 1 , Huabin Dong 2 , Fei Yu 3, 4 , Songdi Liao 1 , Yan Xie 1 , Junwen Liu 3, 4 , Qinge Sha 3, 4 , Zhuangmin Zhong 3, 4 , Limin Zeng 2 , Junyu Zheng 3, 4
Affiliation
Formaldehyde (HCHO) plays an important role in atmospheric photochemistry, HOx budget, and ozone formation. Several instruments have been developed for measuring ambient HCHO, yet few have targeted primary emission sources due to their very high HCHO levels and complex emission conditions. Here, we present a novel portable instrument, the Hantzsch-Abs, based on the Hantzsch reaction and absorption photometry, which is specifically designed for online continuous measurement of HCHO concentrations both in ambient environment and from vehicle exhaust. The Hantzsch-Abs features an adjustable liquid waveguide capillary cell (LWCC), displaying high sensitivity and strong flexibility for HCHO detection. The limit of detection of the Hantzsch-Abs based on a 50 cm LWCC was 25 pptv; the measurement range could be adjusted up to approximately 3 ppmv. A field comparison with commercially available instruments indicated that the Hantzsch-Abs was sufficiently robust in monitoring atmospheric HCHO concentrations. Furthermore, the instrument is capable of capturing dynamic patterns in HCHO emissions from vehicles under both chassis dynamometer and on-road tests, which suggests potential applications in measuring vehicle emissions. Our experimental data indicated that HCHO emission patterns from vehicles are strongly correlated with driving conditions and that current HCHO emission characteristics for vehicles likely require systematic updating.
中文翻译:
在线测量甲醛的新型便携式仪器:从环境到移动排放源
甲醛(HCHO)扮演的大气光化学反应中起重要作用,HO X预算和臭氧形成。已经开发了几种用于测量环境HCHO的仪器,但由于HCHO的水平很高且排放条件复杂,因此很少有针对主要排放源的仪器。在这里,我们基于Hantzsch反应和吸收光度法,提出了一种新颖的便携式仪器Hantzsch-Abs,该仪器专门用于在线连续测量环境和车辆排气中HCHO的浓度。Hantzsch-Abs具有可调节的液体波导毛细管池(LWCC),显示出高灵敏度和强大的HCHO检测灵活性。基于50 cm LWCC的Hantzsch-Abs的检出限为25 pptv。测量范围可以调整到大约3 ppmv。与市售仪器的现场比较表明,汉兹抗体(Hantzsch-Abs)在监测大气HCHO浓度方面具有足够的鲁棒性。此外,该仪器能够在底盘测功机和道路测试中捕获车辆HCHO排放中的动态模式,这暗示了在测量车辆排放中的潜在应用。我们的实验数据表明,车辆的HCHO排放模式与驾驶条件密切相关,并且当前车辆的HCHO排放特性可能需要系统更新。这暗示了在测量车辆排放中的潜在应用。我们的实验数据表明,车辆的HCHO排放模式与驾驶条件密切相关,并且当前车辆的HCHO排放特性可能需要系统更新。这暗示了在测量车辆排放中的潜在应用。我们的实验数据表明,车辆的HCHO排放模式与驾驶条件密切相关,并且当前车辆的HCHO排放特性可能需要系统更新。
更新日期:2020-04-20
中文翻译:
在线测量甲醛的新型便携式仪器:从环境到移动排放源
甲醛(HCHO)扮演的大气光化学反应中起重要作用,HO X预算和臭氧形成。已经开发了几种用于测量环境HCHO的仪器,但由于HCHO的水平很高且排放条件复杂,因此很少有针对主要排放源的仪器。在这里,我们基于Hantzsch反应和吸收光度法,提出了一种新颖的便携式仪器Hantzsch-Abs,该仪器专门用于在线连续测量环境和车辆排气中HCHO的浓度。Hantzsch-Abs具有可调节的液体波导毛细管池(LWCC),显示出高灵敏度和强大的HCHO检测灵活性。基于50 cm LWCC的Hantzsch-Abs的检出限为25 pptv。测量范围可以调整到大约3 ppmv。与市售仪器的现场比较表明,汉兹抗体(Hantzsch-Abs)在监测大气HCHO浓度方面具有足够的鲁棒性。此外,该仪器能够在底盘测功机和道路测试中捕获车辆HCHO排放中的动态模式,这暗示了在测量车辆排放中的潜在应用。我们的实验数据表明,车辆的HCHO排放模式与驾驶条件密切相关,并且当前车辆的HCHO排放特性可能需要系统更新。这暗示了在测量车辆排放中的潜在应用。我们的实验数据表明,车辆的HCHO排放模式与驾驶条件密切相关,并且当前车辆的HCHO排放特性可能需要系统更新。这暗示了在测量车辆排放中的潜在应用。我们的实验数据表明,车辆的HCHO排放模式与驾驶条件密切相关,并且当前车辆的HCHO排放特性可能需要系统更新。