scholarly journals Sensing Precursors of Illegal Drugs—Rapid Detection of Acetic Anhydride Vapors at Trace Levels Using Photoionization Detection and Ion Mobility Spectrometry

Molecules ◽  
2020 ◽  
Vol 25 (8) ◽  
pp. 1852
Author(s):  
Victor Bocos-Bintintan ◽  
George-Bogdan Ghira ◽  
Mircea Anton ◽  
Aurel-Vasile Martiniuc ◽  
Ileana-Andreea Ratiu
Keyword(s):  
Acetic Anhydride ◽  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Operation Mode ◽  
Analytical Techniques ◽  
Negative Ion ◽  
Illegal Drugs ◽  
Product Ions ◽  
Ultra Trace ◽  
Negative Ion Mode

Sensitive real-time detection of vapors produced by the precursors, reagents and solvents used in the illegal drugs manufacture represents a priority nowadays. Acetic anhydride (AA) is the key chemical used as acetylation agent in producing the illegal drugs heroin and methaqualone. This study was directed towards quick detection and quantification of AA in air, using two fast and very sensitive analytical techniques: photoionization detection (PID) and ion mobility spectrometry (IMS). Results obtained indicated that both PID and IMS can sense AA at ultra-trace levels in air, but while PID produces a non-selective response, IMS offers richer information. Ion mobility spectrometric response in the positive ion mode presented one product ion, at reduced ion mobility K0 of 1.89 cm2 V−1 s−1 (almost overlapped with positive reactant ion peak), while in the negative ion mode two well separated product ions, with K0 of 1.90 and 1.71 cm2 V−1 s−1, were noticed. Our study showed that by using a portable, commercial IMS system (model Mini IMS, I.U.T. GmbH Berlin) AA can be easily measured at concentrations of 0.05 ppmv (0.2 mg m−3) in negative ion mode. Best selectivity and sensitivity of the IMS response were therefore achieved in the negative operation mode.

scholarly journals Hunting for Toxic Industrial Chemicals: Real-Time Detection of Carbon Disulfide Traces by Means of Ion Mobility Spectrometry

Toxics ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 121
Author(s):  
Victor Bocos-Bintintan ◽  
Ileana Andreea Ratiu
Keyword(s):  
Real Time ◽  
Carbon Disulfide ◽  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Limit Of Detection ◽  
Negative Ion ◽  
Industrial Chemicals ◽  
Toxic Industrial Chemicals ◽  
Real Time Detection ◽  
Negative Ion Mode

Sensitive real-time detection of vapors produced by toxic industrial chemicals (TICs) represents a stringent priority nowadays. Carbon disulfide (CS2) is such a chemical, being widely used in manufacturing synthetic textile fibers and as a solvent. CS2 is simultaneously a very reactive, highly flammable, irritant, corrosive, and highly toxic compound, affecting the central nervous system, cardiovascular system, eyes, kidneys, liver, skin, and reproductive system. This study was directed towards quick detection and quantification of CS2 in air, using time-of-flight ion mobility spectrometry (IMS); photoionization detection (PID) was also used as confirmatory technique. Results obtained indicated that IMS can detect CS2 at trace levels in air. The ion mobility spectrometric response was in the negative ion mode and presented one product ion, at a reduced ion mobility (K0) of 2.25 cm2 V−1 s−1. Our study demonstrated that by using a portable, commercial IMS system (model Mini IMS, I.U.T. GmbH Berlin Germany) one can easily measure CS2 at concentrations of 0.1 ppmv (0.3 mg m−3) in the negative ion mode, which is below the lowest threshold value of 1 ppmv given for industrial hygiene. A limit of detection (LOD) of ca. 30 ppbv (0.1 mg m−3) was also estimated.

scholarly journals Fast Sensing of Hydrogen Cyanide (HCN) Vapors Using a Hand-Held Ion Mobility Spectrometer with Nonradioactive Ionization Source

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5045
Author(s):  
Victor Bocos-Bintintan ◽  
Ileana Andreea Ratiu
Keyword(s):  
Ion Mobility ◽  
Hydrogen Cyanide ◽  
Limit Of Detection ◽  
Chemical Warfare Agent ◽  
Source Model ◽  
Negative Ion ◽  
Industrial Chemicals ◽  
Ionization Source ◽  
Toxic Industrial Chemicals ◽  
Negative Ion Mode

Sensitive real-time detection of vapors produced by toxic industrial chemicals (TICs) always represents a stringent priority. Hydrogen cyanide (HCN) is definitely a TIC, being widely used in various industries and as an insecticide; it is a reactive, very flammable, and highly toxic compound that affects the central nervous system, cardiovascular system, eyes, nose, throat, and also has systemic effects. Moreover, HCN is considered a blood chemical warfare agent. This study was focused toward quick detection and quantification of HCN in air using time-of-flight ion mobility spectrometry (ToF IMS). Results obtained clearly indicate that IMS can rapidly detect HCN at sub-ppmv levels in air. Ion mobility spectrometric response was obtained in the negative ion mode and presented one single distinct product ion, at reduced ion mobility K0 of 2.38 cm2 V−1 s−1. Our study demonstrated that by using a miniaturized commercial IMS system with nonradioactive ionization source model LCD-3.2E (Smiths Detection Ltd., London, UK), one can easily measure HCN at concentrations of 0.1 ppmv (0.11 mg m−3) in negative ion mode, which is far below the OSHA PEL-TWA value of 10 ppmv. Measurement range was from 0.1 to 10 ppmv and the estimated limit of detection LoD was ca. 20 ppbv (0.02 mg m−3).

scholarly journals Distinguishing between halogenated alkanes containing the same halogen based on the reaction kinetic parameter using negative ion mobility spectrometry at atmospheric pressure

RSC Advances ◽  
2020 ◽  
Vol 10 (49) ◽  
pp. 29441-29449
Author(s):  
Haiyan Han ◽  
Shihu Du ◽  
Yongliang Yan ◽  
Xiuhong Liu ◽  
Qiaofen Zhu ◽  
...  
Keyword(s):  
Kinetic Parameter ◽  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Atmospheric Pressure ◽  
Reaction Kinetic ◽  
Electron Attachment ◽  
High Sensitivity ◽  
Negative Ion ◽  
Volatile Organic ◽  
Halogenated Alkanes

Electron attachment ionization ion mobility spectrometry can be used to detect halogen-containing volatile organic compounds with high sensitivity.

Sterically hindered phenols in negative ion mobility spectrometry-mass spectrometry

2009 ◽  
Vol 23 (19) ◽  
pp. 3069-3076 ◽  
Author(s):  
Jaakko Laakia ◽  
Christian Schack Pedersen ◽  
Alexey Adamov ◽  
Jyrki Viidanoja ◽  
Alexey Sysoev ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Negative Ion ◽  
Sterically Hindered Phenols ◽  
Hindered Phenols ◽  
Sterically Hindered
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