Three (3) Smiley Icons Indicate Indoor Air Quality Levels at (0/0.08/0.8 ppm) Stable Electrochemical Sensor for Hcho Detection Programmable High Alarm Manual 0 ppm Calibration Audible/Visible LED Warning for High Hcho Concentration Environmental / Weather Stations - View related products Order...
Results of this investigation revealed that most sites had on the averageexceeded the recommended standards for SO2 and NH3 bothindoor and outdoor, with indoor levels being worse than outdoorduring winter time. Several sites also showed high levels of HCHO, with outdoor le 展开 ...
A GEOS-Chem sensitivity simulation indicates that HCHO levels would decrease by 20-30% in the absence of U.S. anthropogenic NO^sub x^ emissions. Thus, NO^sub x^ emission controls to improve ozone air quality have a significant cobenefit in reducing HCHO-related cancer risks. (ProQuest: .....
In order to decrease the health risks, China government promulgated the hygienic standard for air quality inside long distance coach (GB/T 17729–2009) and the guideline for air quality assessment of passenger car (GB/T 27630–2011), with the HCHO limit levels of 0.12 and 0.10 mg/m3 ...
traffic and industrial sources results in important and localized enhancements of the HCHO levels. The seasonal and inter-annual variations of the formaldehyde distribution are principally related to temperature changes and fire events, but also to changes in anthropogenic activities. HCHO concentrations in...
levels -Test variables: PM2.5/1.0/10, formaldehyde, TVOC, temperature, humidity -Large 1000mAh capacity Lithium battery -On-board fan to draw in ambient air for more accurate real-time results -5V Micro USB charging -Low battery warning ...
China’s government has issued a series of regulations and strategies to mitigate the high levels of air pollution. For example, the State Council of China issued the Air Pollution Prevention Action Plan (Huang et al., 2018, Li et al., 2020a) and the Win the Blue Sky Three-Year Action...
Air quality in the Middle East has considerably deteriorated in the last decades. In particular tropospheric ozone reaches very high levels during summer d... JF Müller,T Stavrakou,M Bauwens,... - Egu General Assembly Conference 被引量: 0发表: 2017年 A PRE-STUDY OF HCHO AND VOCS EMISSION...
During the 1980s, ozone levels in the Mexico City Metropolitan Area (MCMA) reached values of 300 ppb (Molina and Molina, 2006); later in the early 1990s, concentrations peaked at 400 ppb, and MCMA was regarded as the city with the worst air quality in the world (World Health Organizati...
Boeke NL, Marshall JD, Alvarez S, Chance KV, Fried A, Kurosu TP, Rappenglück B, Richter D, Walega JG, Weibring P, Millet D (2011) Formaldehyde columns from the ozone monitoring instrument: urban versus background levels and evaluation using aircraft data and a global model. J Geophys ...