CIMS Chemical ionization mass

Experimental Techniques A absorption CIMS = chemical ionization mass spectroscopy CK = competitive kinetics DF discharge flow EPR = electron paramagnetic resonance FP = flash photolysis FT = flow tube FTIR Fourier transform intra-red GC = gas chromatography, UF = laser induced fluorescence LMR = laser magnetic resonance MS = mass spectroscopy PLP = pulsed laser photolysis SC = smog chamber SP = steady (continuous) photolysis UVF = ultraviolet flourescence spectroscopy... 

PR/UV, pulse radiolysis/UV absorption CIMS, chemical ionization mass spectrometry LIF, laser-induced fluorescence RRM, relative rate method FT-IR, FT-IR method. 

Figure 28.7 Measurement data of diurnal cycles of HNO3, at a site near Boulder, Colorado. CIMS chemical ionization mass spectrometer. From Horii et al, 1999. Reproduced from Horii et ai, SPIE 3758-19, 1999, with permission of the...

GC-CIMS Gas chromatography coupled to chemical ionization mass spectrometry... 

Mass spectrometiy. Several instruments based on chemical ionization mass spectrometry (CIMS) have been developed and applied to ambient air (Huey et al., 1998 Mauldin et al., 1998). Figure 11.32 shows two such instruments that have undergone an informal intercomparison study between themselves and a filter pack (nylon) method (Fehsenfeld et al., 1998). 

Chemical Ionization Mass Spectrometry (CIMS) Detector... 

Gas-phase acid-base studies are usually performed by using one of the following techniques high-pressure mass spectrometry (HPMS), chemical ionization mass spectroscopy (CIMS) with mass-analysed ion kinetic energy spectroscopy/collision induced dissociation (MIKES/CID), flowing afterglow (FA) or ion cyclotron resonance (ICR) spectrometry. For a brief description of all methods, Reference 8 should be consulted. 

Two general methods utilizing the stable isotope dilution technique have been successfully used for the quantification of drugs and their metabolites by ms. The simplest, but least sensitive and specific method, is a non-chromatographic technique that utilizes chemical ionization mass spectrometry (cims) and internal standards labeled with stable isotopes. This method has been used to quantify the antiarrhythmic drugs, lidoq lne and quinidine and some of their metabolites, in human plasma samples. 

The formation of SO2, COS and H2S was also studied during exhaust conditions. Chemical Ionization Mass Spectrometry (CIMS) was used for on-line exhaust gas analysis (11). In the CIMS instnunent (CIMS 500, V F) the exhaust gas is soft ionized by a pre-ionized Xe gas. SO2, H2S and COS in the exhaust gas was continously analyzed. The exhaust gas was generated by a Volvo 234 FT engine, with a fuel containing 629 ppm sulfur. The engine speed was 2700 rpm with a load of about 15 Nm and the outlet temperature was 873 K. The engine was run with... 

Further studies" of chemical ionization mass spectrometry (CIMS) applied to steroids show that the method has considerable potential for molecular weight determinations, and for the recognition of functional groups with active hydro-... 

Nonylphenol polyethoxylates and their degradation products have been detected in river water and sewage effluent by GC-ion trap (tandem) MS with electron impact (El) and chemical ionization, which was followed by direct GC-MS analysis in EI-MS, chemical ionization mass spectrometry (CIMS), or CIMS—MS modes. 

Blum, W, Schlumpf, E., Liehr, J.G., Richter, W.J. (1976) On-line Hydro-gen/Deuterium Exchange in Capillary Gas Chromatography-Chemical Ionization Mass Spectrometry (GC-CIMS) as a Means of Structure Analysis in Complex Mixtures. Tetrahedron Lett. 7 565-568. 

A Method for the Determination of Amitriptyline and Its Metabolites Nortriptyline, 10-Hydroxyamitriptyline, and 10-Hydroxynortriptyline in Human Plasma Using Stable Isotope Dilution and Gas Chromatographic-Chemical Ionization Mass Spectrometry (GC-CIMS)... 

Thermally decomposed TATB condensed phase products have been isolated by repeated thin layer chromatography (TLC) elution, and chemical ionization mass spectrometry (CIMS) analysis reveals at least three furoxan products formed by the loss of H2 and cyclization of adjacent amino and nitro groups (Figure 11). 3 This must involve N—H bond rupture and is consistent with it being the same... 

Yatavelli RLN, Thornton JA (2010) Particulate organic matter detection using a micro-OTifice volatilization impactor coupled to a chemical ionization mass spectrometer (MOVI-CIMS). Aerosol Sci Technol 44 67-74... 

In the ten years since its development, chemical ionization mass spectrometry (CIMS) has undergone remarkable growth to become an important analytical tool for the identification, structural elucidation and quantitation of organic compounds. Its utility in pharmacological and biochemical research has been firmly established over the last few years. 

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