Results 11 to 20 of about 4,272 (246)

Updates in Chemical Analysis of Drugs of Abuse [PDF]

Zagazig Journal of Forensic Medicine and Toxicology, 2021
Introduction: Drug abuse is a worldwide crisis, and illicit drug testing is widely applied daily both clinically and forensically. Gas chromatography- mass spectrometry (GC-MS) is the traditional confirmatory gold standard for drug testing and is used ...
Ghadeer Abdelaal
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Parameterization of ion-induced nucleation rates based on ambient observations [PDF]

Atmospheric Chemistry and Physics, 2011
Atmospheric ions participate in the formation of new atmospheric aerosol particles, yet their exact role in this process has remained unclear. Here we derive a new simple parameterization for ion-induced nucleation or, more precisely, for the formation ...
T. Nieminen, P. Paasonen, H. E. Manninen, K. Sellegri, V.-M. Kerminen, M. Kulmala   +5 more
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Evolution of particle composition in CLOUD nucleation experiments [PDF]

Atmospheric Chemistry and Physics, 2013
Sulphuric acid, ammonia, amines, and oxidised organics play a crucial role in nanoparticle formation in the atmosphere. In this study, we investigate the composition of nucleated nanoparticles formed from these compounds in the CLOUD (Cosmics Leaving ...
H. Keskinen, A. Virtanen, J. Joutsensaari, G. Tsagkogeorgas, J. Duplissy, S. Schobesberger, M. Gysel, F. Riccobono, J. G. Slowik, F. Bianchi, T. Yli-Juuti, K. Lehtipalo, L. Rondo, M. Breitenlechner, A. Kupc, J. Almeida, A. Amorim, E. M. Dunne, A. J. Downard, S. Ehrhart, A. Franchin, M.K. Kajos, J. Kirkby, A. Kürten, T. Nieminen, V. Makhmutov, S. Mathot, P. Miettinen, A. Onnela, T. Petäjä, A. Praplan, F. D. Santos, S. Schallhart, M. Sipilä, Y. Stozhkov, A. Tomé, P. Vaattovaara, D. Wimmer, A. Prevot, J. Dommen, N. M. Donahue, R.C. Flagan, E. Weingartner, Y. Viisanen, I. Riipinen, A. Hansel, J. Curtius, M. Kulmala, D. R. Worsnop, U. Baltensperger, H. Wex, F. Stratmann, A. Laaksonen   +52 more
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Fabrication of nano battery from CdS quantum dots and organic polymer

Kuwait Journal of Science, 2021
Rechargeable nano batteries are effective energy storage devices; however, due to the small specific charge ability of the electrode materials, the available energy of current nanomaterial ion batteries is still inadequate for many applications.
Akeel Kadim
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Application of Ion Mobility Spectrometry for Permeability Studies of Organic Substances through Polymeric Materials

Molecules, 2020
Drift tube ion mobility spectrometers (DT IMS) allow the concentration of different organic compounds to be measured. This gives the opportunity to use these detectors in measuring the penetration of various substances through polymer membranes ...
Monika Wiśnik-Sawka, Edyta Budzyńska, Jarosław Puton   +2 more
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EUCAARI ion spectrometer measurements at 12 European sites – analysis of new particle formation events [PDF]

Atmospheric Chemistry and Physics, 2010
We present comprehensive results on continuous atmospheric cluster and particle measurements in the size range ~1–42 nm within the European Integrated project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI) project.
H. E. Manninen, T. Nieminen, E. Asmi, S. Gagné, S. Häkkinen, K. Lehtipalo, P. Aalto, M. Vana, A. Mirme, S. Mirme, U. Hõrrak, C. Plass-Dülmer, G. Stange, G. Kiss, A. Hoffer, N. Törő, M. Moerman, B. Henzing, G. de Leeuw, M. Brinkenberg, G. N. Kouvarakis, A. Bougiatioti, N. Mihalopoulos, C. O'Dowd, D. Ceburnis, A. Arneth, B. Svenningsson, E. Swietlicki, L. Tarozzi, S. Decesari, M. C. Facchini, W. Birmili, A. Sonntag, A. Wiedensohler, J. Boulon, K. Sellegri, P. Laj, M. Gysel, N. Bukowiecki, E. Weingartner, G. Wehrle, A. Laaksonen, A. Hamed, J. Joutsensaari, T. Petäjä, V.-M. Kerminen, M. Kulmala   +46 more
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Pulsed electron beams in ion mobility spectrometry

Reviews in Analytical Chemistry, 2012
Ion mobility spectrometry is a well-known technique used to analyze trace gases in ambient air. Typically, it works by employing a radioactive source to provide electrons with high energy to ionize the analytes in a series of chemical reactions.
Baether Wolfgang, Zimmermann Stefan, Gunzer Frank   +2 more
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Field inter-comparison of eleven atmospheric ammonia measurement techniques [PDF]

Atmospheric Measurement Techniques, 2010
Eleven instruments for the measurement of ambient concentrations of atmospheric ammonia gas (NH3), based on eight different measurement methods were inter-compared above an intensively managed agricultural field in late summer 2008 in Southern Scotland ...
K. von Bobrutzki, C. F. Braban, D. Famulari, S. K. Jones, T. Blackall, T. E. L. Smith, M. Blom, H. Coe, M. Gallagher, M. Ghalaieny, M. R. McGillen, C. J. Percival, J. D. Whitehead, R. Ellis, J. Murphy, A. Mohacsi, A. Pogany, H. Junninen, S. Rantanen, M. A. Sutton, E. Nemitz   +20 more
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Ion Mobility Spectrometry in Food Analysis: Principles, Current Applications and Future Trends

Molecules, 2019
In the last decade, ion mobility spectrometry (IMS) has reemerged as an analytical separation technique, especially due to the commercialization of ion mobility mass spectrometers. Its applicability has been extended beyond classical applications such as
Maykel Hernández-Mesa, David Ropartz, Ana M. García-Campaña, Hélène Rogniaux, Gaud Dervilly-Pinel, Bruno Le Bizec   +5 more
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Results of the first air ion spectrometer calibration and intercomparison workshop [PDF]

Atmospheric Chemistry and Physics, 2009
The Air Ion Spectrometer (AIS) measures mobility and size distributions of atmospheric ions. The Neutral cluster and Air Ion Spectrometer (NAIS) can additionally measure neutral particles.
E. Asmi, M. Sipilä, H. E. Manninen, J. Vanhanen, K. Lehtipalo, S. Gagné, K. Neitola, A. Mirme, S. Mirme, E. Tamm, J. Uin, K. Komsaare, M. Attoui, M. Kulmala   +13 more
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