salicylates and dimethyl-methylphosphonate

salicylates has been researched along with dimethyl-methylphosphonate* in 2 studies

Other Studies

2 other study(ies) available for salicylates and dimethyl-methylphosphonate

Article	Year
Facility monitoring of chemical warfare agent simulants in air using an automated, field-deployable, miniature mass spectrometer. Rapid communications in mass spectrometry : RCM, 2011, May-30, Volume: 25, Issue:10 Vapors of four chemical warfare agent (CWA) stimulants, 2-chloroethyl ethyl sulfide (CEES), diethyl malonate (DEM), dimethyl methylphosphonate (DMMP), and methyl salicylate (MeS), were detected, identified, and quantitated using a fully automated, field-deployable, miniature mass spectrometer. Samples were ionized using a glow discharge electron ionization (GDEI) source, and ions were mass analyzed with a cylindrical ion trap (CIT) mass analyzer. A dual-tube thermal desorption system was used to trap compounds on 50:50 Tenax TA/Carboxen 569 sorbent before their thermal release. The sample concentrations ranged from low parts per billion [ppb] to two parts per million [ppm]. Limits of detection (LODs) ranged from 0.26 to 5.0 ppb. Receiver operating characteristic (ROC) curves are presented for each analyte. A sample of CEES at low ppb concentration was combined separately with two interferents, bleach (saturated vapor) and diesel fuel exhaust (1%), as a way to explore the capability of detecting the simulant in an environmental matrix. Also investigated was a mixture of the four CWA simulants (at concentrations in air ranging from 270 to 380 ppb). Tandem mass (MS/MS) spectral data were used to identify and quantify the individual components. Topics: Air; Chemical Warfare Agents; Malonates; Miniaturization; Models, Chemical; Mustard Gas; Organophosphorus Compounds; ROC Curve; Salicylates; Sensitivity and Specificity; Tandem Mass Spectrometry	2011
Development of a palm portable mass spectrometer. Journal of the American Society for Mass Spectrometry, 2008, Volume: 19, Issue:10 A palm portable mass spectrometer (PPMS) has been developed with a weight of 1.48 kg (3 lb) and a size of 1.54 L (8.2 x 7.7 x 24.5 cm(3)) that can be operated with an average battery power of 5 W. A miniaturized ion trap has been used as a mass analyzer that consists of four parallel disks with coaxial holes. A rf voltage of 1500 V(p-p) at 3.9 MHz has been used for scanning ion mass of up to m/z 300. An ion-getter pump serves for high vacuum of the PPMS. Sample gas was introduced in pulse mode. An embedded microcomputer has been developed for system control. Detection of organic gases diluted in the air has been demonstrated up to 6 ppm for toluene and 22 ppm for dimethyl methylphosphonate (DMMP). Performance results suggest usefulness of the PPMS as a personal mobile device for detection/identification of chemical warfare agents in the field. Topics: Air; Algorithms; Chemical Warfare Agents; Electric Power Supplies; Electronics; Ions; Mass Spectrometry; Miniaturization; Organophosphorus Compounds; Reproducibility of Results; Salicylates; Software; Tetrachloroethylene; Toluene; Vacuum Curettage	2008

Article

Year

Facility monitoring of chemical warfare agent simulants in air using an automated, field-deployable, miniature mass spectrometer.

Rapid communications in mass spectrometry : RCM, 2011, May-30, Volume: 25, Issue:10

Vapors of four chemical warfare agent (CWA) stimulants, 2-chloroethyl ethyl sulfide (CEES), diethyl malonate (DEM), dimethyl methylphosphonate (DMMP), and methyl salicylate (MeS), were detected, identified, and quantitated using a fully automated, field-deployable, miniature mass spectrometer. Samples were ionized using a glow discharge electron ionization (GDEI) source, and ions were mass analyzed with a cylindrical ion trap (CIT) mass analyzer. A dual-tube thermal desorption system was used to trap compounds on 50:50 Tenax TA/Carboxen 569 sorbent before their thermal release. The sample concentrations ranged from low parts per billion [ppb] to two parts per million [ppm]. Limits of detection (LODs) ranged from 0.26 to 5.0 ppb. Receiver operating characteristic (ROC) curves are presented for each analyte. A sample of CEES at low ppb concentration was combined separately with two interferents, bleach (saturated vapor) and diesel fuel exhaust (1%), as a way to explore the capability of detecting the simulant in an environmental matrix. Also investigated was a mixture of the four CWA simulants (at concentrations in air ranging from 270 to 380 ppb). Tandem mass (MS/MS) spectral data were used to identify and quantify the individual components.

Topics: Air; Chemical Warfare Agents; Malonates; Miniaturization; Models, Chemical; Mustard Gas; Organophosphorus Compounds; ROC Curve; Salicylates; Sensitivity and Specificity; Tandem Mass Spectrometry

2011

Development of a palm portable mass spectrometer.

Journal of the American Society for Mass Spectrometry, 2008, Volume: 19, Issue:10

A palm portable mass spectrometer (PPMS) has been developed with a weight of 1.48 kg (3 lb) and a size of 1.54 L (8.2 x 7.7 x 24.5 cm(3)) that can be operated with an average battery power of 5 W. A miniaturized ion trap has been used as a mass analyzer that consists of four parallel disks with coaxial holes. A rf voltage of 1500 V(p-p) at 3.9 MHz has been used for scanning ion mass of up to m/z 300. An ion-getter pump serves for high vacuum of the PPMS. Sample gas was introduced in pulse mode. An embedded microcomputer has been developed for system control. Detection of organic gases diluted in the air has been demonstrated up to 6 ppm for toluene and 22 ppm for dimethyl methylphosphonate (DMMP). Performance results suggest usefulness of the PPMS as a personal mobile device for detection/identification of chemical warfare agents in the field.

Topics: Air; Algorithms; Chemical Warfare Agents; Electric Power Supplies; Electronics; Ions; Mass Spectrometry; Miniaturization; Organophosphorus Compounds; Reproducibility of Results; Salicylates; Software; Tetrachloroethylene; Toluene; Vacuum Curettage

2008