Long-term sub second-response monitoring of gaseous ammonia in ambient air by positive inhaling ion mobility spectrometry

Talanta ◽  
2017 ◽  
Vol 175 ◽  
pp. 522-527 ◽  
Author(s):  
Wei Huang ◽  
Weiguo Wang ◽  
Chuang Chen ◽  
Mei Li ◽  
Liying Peng ◽  
...  
Keyword(s):  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Ambient Air ◽  
Response Monitoring ◽  
Gaseous Ammonia

scholarly journals Quantification of Volatile Acetone Oligomers Using Ion-Mobility Spectrometry

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Tobias Hüppe ◽  
Dominik Lorenz ◽  
Felix Maurer ◽  
Tobias Fink ◽  
Ramona Klumpp ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Critically Ill ◽  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Critically Ill Patients ◽  
Ambient Air ◽  
Coefficient Of Determination ◽  
Acetone Concentration ◽  
Potential Biomarker

Background. Volatile acetone is a potential biomarker that is elevated in various disease states. Measuring acetone in exhaled breath is complicated by the fact that the molecule might be present as both monomers and dimers, but in inconsistent ratios. Ignoring the molecular form leads to incorrect measured concentrations. Our first goal was to evaluate the monomer-dimer ratio in ambient air, critically ill patients, and rats. Our second goal was to confirm the accuracy of the combined (monomer and dimer) analysis by comparison to a reference calibration system. Methods. Volatile acetone intensities from exhaled air of ten intubated, critically ill patients, and ten ventilated Sprague-Dawley rats were recorded using ion-mobility spectrometry. Acetone concentrations in ambient air in an intensive care unit and in a laboratory were determined over 24 hours. The calibration reference was pure acetone vaporized by a gas generator at concentrations from 5 to 45 ppbv (parts per billion by volume). Results. Acetone concentrations in ambient laboratory air were only slightly greater (5.6 ppbv; 95% CI 5.1–6.2) than in ambient air in an intensive care unit (5.1 ppbv; 95% CI 4.4–5.5; p < 0.001 ). Exhaled acetone concentrations were only slightly greater in rats (10.3 ppbv; 95% CI 9.7–10.9) than in critically ill patients (9.5 ppbv; 95% CI 7.9–11.1; p < 0.001 ). Vaporization yielded acetone monomers (1.3–5.3 mV) and dimers (1.4–621 mV). Acetone concentrations (ppbv) and corresponding acetone monomer and dimer intensities (mV) revealed a high coefficient of determination (R2 = 0.96). The calibration curve for acetone concentration (ppbv) and total acetone (monomers added to twice the dimers; mV) was described by the exponential growth 3-parameter model, with an R2 = 0.98. Conclusion. The ratio of acetone monomer and dimer is inconsistent and varies in ambient air from place-to-place and across individual humans and rats. Monomers and dimers must therefore be considered when quantifying acetone. Combining the two accurately assesses total volatile acetone.

Real-time monitoring traces of SF6 in near-source ambient air by ion mobility spectrometry

2019 ◽  
Vol 99 (9) ◽  
pp. 868-877 ◽  
Author(s):  
Wei Huang ◽  
Weiguo Wang ◽  
Chuang Chen ◽  
Yang Li ◽  
Zhenxin Wang ◽  
...  
Keyword(s):  
Real Time ◽  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Ambient Air ◽  
Real Time Monitoring

Determination of terpenes in humid ambient air using ultraviolet ion mobility spectrometry

2004 ◽  
Vol 513 (2) ◽  
pp. 393-399 ◽  
Author(s):  
Wolfgang Vautz ◽  
Stefanie Sielemann ◽  
Jörg Ingo Baumbach
Keyword(s):  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Ambient Air

scholarly journals Recognition of emission from the wood based products waste combustion using differential ion mobility spectrometry

2019 ◽  
Vol 116 ◽  
pp. 00047
Author(s):  
Monika Maciejewska ◽  
Andrzej Szczurek ◽  
Żaneta Zajiczek
Keyword(s):  
Volatile Compounds ◽  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Ambient Air ◽  
Wood Products ◽  
Gas Mixture ◽  
Promising Technique ◽  
Waste Combustion ◽  
Differential Ion Mobility Spectrometry ◽  
Engineered Wood Products

This work was focussed on the recognition of the emission of volatile compounds resulting from the combustion of engineered wood products waste. This kind of waste is broadly used for heating purposes in an unauthorised way, giving rise to unorganised emissions. The recognition of such events is very difficult due to the complexity of the produced gas mixture. We proposed to apply differential ion mobility spectrometry (DMS). This is a promising technique in terms of complex gas mixtures measurements. The recognition was based on the measurements of ambient air in the vicinity of the emission source and classification. The ensemble of classification trees was chosen as the classier. The obtained results showed that volatile compounds resulting from the combustion of wood based boards waste produced the distinctive DMS spectra, which could be used as the basis for the effective recognition. We achieved almost 100 % successful recognition of: 1) ambient air which contained volatile compounds resulting from OSB board waste combustion, 2) ambient air which contained volatile compounds resulting from MDF board waste combustion, and 3) ambient air, which was did not contain volatile compounds of this kind. The presented results have a considerable practical value. The DMS spectrometer was successfully applied to recognize wood-based boards waste combustion in field conditions.

Sign in / Sign up

Export Citation Format

Share Document