Application of validation data tests from an on-line volatile organic compound analyser to the detection of air pollution episodes in urban areas

2004 ◽  
Vol 524 (1-2) ◽  
pp. 41-49 ◽  
Author(s):  
Maria Carmen Gómez ◽  
Nieves Durana ◽  
Marino Navazo ◽  
Lucio Alonso ◽  
Jose Antonio Garcı́a ◽  
...  
Keyword(s):  
Air Pollution ◽  
Organic Compound ◽  
Volatile Organic Compound ◽  
Urban Areas ◽  
Validation Data ◽  
Volatile Organic ◽  
On Line ◽  
Air Pollution Episodes ◽  
Pollution Episodes

scholarly journals Visualising household air pollution: Colorimetric sensor arrays for monitoring volatile organic compounds indoors

PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0258281
Author(s):  
Emer Duffy ◽  
Kati Huttunen ◽  
Roosa Lahnavik ◽  
Alan F. Smeaton ◽  
Aoife Morrin
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Organic Compound ◽  
Indoor Air Quality ◽  
Volatile Organic Compound ◽  
Indoor Air ◽  
Sensor Arrays ◽  
Colorimetric Sensor ◽  
Pollution Monitoring ◽  
Volatile Organic

Indoor air quality monitoring as it relates to the domestic setting is an integral part of human exposure monitoring and health risk assessment. Hence there is a great need for easy to use, fast and economical indoor air quality sensors to monitor the volatile organic compound composition of the air which is known to be significantly perturbed by the various source emissions from activities in the home. To meet this need, paper-based colorimetric sensor arrays were deployed as volatile organic compound detectors in a field study aiming to understand which activities elicit responses from these sensor arrays in household settings. The sensor array itself is composed of pH indicators and aniline dyes that enable molecular recognition of carboxylic acids, amines and carbonyl-containing compounds. The sensor arrays were initially deployed in different rooms in a single household having different occupant activity types and levels. Sensor responses were shown to differ for different room settings on the basis of occupancy levels and the nature of the room emission sources. Sensor responses relating to specific activities such as cooking, cleaning, office work, etc were noted in the temporal response. Subsequently, the colorimetric sensor arrays were deployed in a broader study across 9 different households and, using multivariate analysis, the sensor responses were shown to correlate strongly with household occupant activity and year of house build. Overall, this study demonstrates the significant potential for this type of simple approach to indoor air pollution monitoring in residential environments.

scholarly journals Measuring OVOCs and VOCs by PTR-MS in an urban roadside microenvironment of Hong Kong: relative humidity and temperature dependence, and field inter-comparisons

2016 ◽  
Author(s):  
Long Cui ◽  
Zhou Zhang ◽  
Yu Huang ◽  
Shun Cheng Lee ◽  
Donald Ray Blake ◽  
...  
Keyword(s):  
Hong Kong ◽  
Organic Compound ◽  
Relative Humidity ◽  
Volatile Organic Compound ◽  
Measurement Techniques ◽  
Absolute Humidity ◽  
Electron Capture Detection ◽  
Sampling Campaign ◽  
Volatile Organic ◽  
On Line

Abstract. Volatile organic compound (VOC) control is an important issue of air quality management in Hong Kong because ozone formation is generally VOC limited. Several oxygenated volatile organic compound (OVOC) and VOC measurement techniques, namely, (1) off-line 2,4-dinitrophenylhydrazine (DNPH) cartridge sampling followed by High Performance Liquid Chromatography (HPLC) analysis, (2) on-line gas chromatography (GC) with flame ionization detection (FID), and (3) off-line canister sampling followed by GC with mass spectrometer detection (MSD), FID, and (electron capture detection) ECD, were applied during this study. For the first time, the proton transfer reaction–mass spectrometry (PTR-MS) technique was also introduced to measured OVOCs and VOC in urban roadside area of Hong Kong. The integrated effect of ambient relative humidity (RH) and temperature (T) on formaldehyde measurements by PTR-MS was explored in this study. A Poly 2-D regression was found to be the best nonlinear surface simulation (r = 0.97) of the experimental reaction rate coefficient ratio, ambient RH and T for formaldehyde measurement. This correction method was found to be better than correcting formaldehyde concentrations directly via the absolute humidity of inlet sample, based on a two-year field sampling campaign at Mong Kok (MK) in Hong Kong. For OVOC species, formaldehyde, acetaldehyde, acetone and MEK showed good agreements between PTR-MS and DNPH-HPLC with with slopes of 1.00, 1.10, 0.76 and 0.88, respectively, and correlation coefficients of 0.79, 0.75, 0.60 and 0.93, respectively. Overall, fair agreements were found between PTR-MS and on-line GC- FID for benzene (slope = 1.23, r = 0.95), toluene (slope = 1.01, r = 0.96) and C2-benzenes (slope = 1.02, r = 0.96) after correcting benzene and C2-benzenes levels which could be affected by fragments formed from ethylbenzene. For the inter-comparisons between PTR-MS and off-line canister measurements by GC-MSD/FID/ECD, benzene showed good agreement with a slope of 1.05 (r = 0.62), though PTR-MS had lower values for toluene and C2-benzenes with slopes of 0.78 (r = 0.96) and 0.67 (r = 0.92), respectively. All in all, the PTR-MS instrument is suitable for OVOC and VOC measurements in urban roadside areas.

scholarly journals ENVIRONMENTAL POLLUTION : EXPLORING THE DOMAIN

2020 ◽  
Author(s):  
JAYDIP DATTA
Keyword(s):  
Waste Water ◽  
Air Pollution ◽  
Organic Compound ◽  
Ir Spectra ◽  
Volatile Organic Compound ◽  
Industrial Waste ◽  
Environmental Science ◽  
Toxic Metal ◽  
Industrial Waste Water ◽  
Volatile Organic

In this impression we will review the following references by pointing the salient features like Environmental Science [ 1 ]- Definition relating the Biodiversity, Sustainability Ecology like Conservation issues. Next the Pollution issues like Lead (Pb ) as a major toxicological component[2] for water as well as air pollution emit ants . Arsenic ( As ) ,another toxic metal [2 ] component mainly drinking as well as industrial waste water . Finally the instrumental techniques [ 3 ] like Flame photometry, Atomic Absorption Spectrophotometer ( AAS ) , UV & IR spectra ( Fourier & Non-dispersive ) , Draegers tube for sulphur , nitrogen volatile organic compound for air pollution .

Pilot plant plasma-catalytic system for the decomposition of a volatile organic compound

2016 ◽  
Vol 15 (3) ◽  
pp. 251-259
Author(s):  
Shreedhar Devkota ◽  
◽  
Jin Oh Jo ◽  
Dong Lyong Jang ◽  
Young Jin Hyun ◽  
...  
Keyword(s):  
Organic Compound ◽  
Catalytic System ◽  
Volatile Organic Compound ◽  
Pilot Plant ◽  
Volatile Organic
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