Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Laser mass spectrometry

The incidence of these defects is best determined by high resolution F nmr (111,112) infrared (113) and laser mass spectrometry (114) are alternative methods. Typical commercial polymers show 3—6 mol % defect content. Polymerization methods have a particularly strong effect on the sequence of these defects. In contrast to suspension polymerized PVDF, emulsion polymerized PVDF forms a higher fraction of head-to-head defects that are not followed by tail-to-tail addition (115,116). Crystallinity and other properties of PVDF or copolymers of VDF are influenced by these defect stmctures (117). [Pg.387]

CA 73,100610 (1970) A pulsed ruby laser-mass spectrometry technique was developed and applied, wherein granular mixts of AP and lightabsorbing substrate materials were rapidly flash py roly zed (0.8 msec) within the low-pressure lon-source chamber of a Bendix TOF mass... [Pg.943]

Selective extractions are not only of interest to solvent extraction, but also to thermal extractions. For example, selective in situ detection of polymer additives is possible using laser mass spectrometry, notably UV laser desorption/MS [561]. The proper matching of extraction technique to a sample determines the success of the operation and enhances the precision and accuracy of the analysis. [Pg.139]

Inorganic mass spectrometry is described in Section 8.5 related topics are laser mass spectrometry and surface mass spectrometry. In the 37-page review on the analysis of additives by Freitag [2] in 1990, just 13 lines were devoted to mass spectrometry. Later, Batail-lard el al. [3] still dedicate less than a page to MS, although many regard the technique as one of the most important of its kind available today. This monograph... [Pg.350]

LA Laser ablation Two-step laser mass spectrometry... [Pg.756]

Cotter, R. J. Laser mass spectrometry An overview of techniques, instruments and applications. Anal. Chim. Acta 1987,195,45-59. [Pg.122]

Dale, M. J. Costello, K. F. Jones, A. C. Langridge-Smith, P. Investigation of pos-phyrins and metalloporphyrins using two-step laser mass spectrometry. J. Mass Spectrom. 1996,31,590-601. [Pg.178]

Zhan, Q. Voumard, P. Zenobi, R. Chemical analysis of cancer therapy photosensitizers by 2-step laser mass spectrometry. Anal. Chem. 1994, 66, 3259-3266. [Pg.179]

Hinz, K.-P., R. Kaufmann, and B. Spengler, Simultaneous Detection of Positive and Negative Ions from Single Airborne Particles by Real-Time Laser Mass Spectrometry, Aerosol Sci. Technol., 24, 233-242 (1996). [Pg.645]

Middlebrook, A. M., D. S. Thomson, and D. M. Murphy, On the Purity of Laboratory-Generated Sulfuric Acid Droplets and Ambient Particles Studied by Laser Mass Spectrometry, Aerosol Sci. Technol., 27, 293-307 (1997). [Pg.648]

Dorfner, R., Ferge, T, Yeretzian, C., Kettrup, A., Zimmermann, R. (2004) Laser mass spectrometry as on-line sensor for indiKtrial process analysis Process control of coffee roasting. Anal. Chem. 76 1386-1402. [Pg.359]

From the above discussion of the characteristics of the spectra and ion formation mechanisms, it is obvious that, though there can be no doubt about the usefulness of laser mass spectrometry for a large variety of analytical tasks, more research is needed for a better understanding. This is particularly true for the transition from thermal evaporation to desorption and the desorption mode itself. In the following, a few first results of such experiments, conducted recently in the author s group, will be reported. [Pg.74]

Variable recovery is a principal cause of non-equivalence of data and there is no straightforward solution to this problem [26], Artificially made reference samples or pure compounds added to test material cannot be used for estimations of recovery of analytes. Direct speciation analysis from the solid sample [27] is not feasible at present, although analytical methods are appearing that could be useful in the future (X-ray absorption spectrometry, laser mass spectrometry, static secondary ion mass spectrometry). [Pg.41]

Intact molecular ion formation has a great advantage for application to femtosecond laser mass spectrometry (FLMS). The Ledingham group has used... [Pg.37]

Hahn J. H., Zenobi R., Bada J. L., and Zare R. N. (1988) Application of two-step laser mass spectrometry to cosmo-geochemistry direct analysis of meteorites. Science 239, 1523-1525. [Pg.289]

Kovalenko F. J., Maechling C. R., Clemett S. J., Philippoz J. M., Zare R. N., and Alexaner C. M. O. D. (1992) Microscopic organic analysis using two step laser mass spectrometry application to meteoritic acid residues. Anal. Chem. 64, 682-690. [Pg.290]

Hi) Methods based on mass spectrometry Spark-source mass spectrometry Glow-discharge mass spectrometry Inductively coupled-plasma mass spectrometry Electro-thermal vaporization-lCP-MS Thermal-ionization mass spectrometry Accelerator mass spectrometry Secondary-ion mass spectrometry Secondary neutral mass spectrometry Laser mass spectrometry Resonance-ionization mass spectrometry Sputter-initiated resonance-ionization spectroscopy Laser-ablation resonance-ionization spectroscopy... [Pg.208]

The technique based on laser-induced breakdown coupled to mass detection, which should thus be designated LIB-MS, is better known as laser plasma ionization mass spectrometry (LI-MS). The earliest uses of the laser-mass spectrometry couple were reported in the late 1960s. Early work included the vaporization of graphite and coal for classifying coals, elemental analyses in metals, isotope ratio measurements and pyrolysis [192]. Later work extended these methods to biological samples, the development of the laser microprobe mass spectrometer, the formation of molecular ions from non-voIatile organic salts and the many multi-photon techniques designed for (mainly) molecular analysis [192]. [Pg.492]

Dale MJ, Jones AC, Pollard JT, et al. 1993. Application of two-step laser mass spectrometry to the analysis of polynuclear aromatic hydrocarbons in contaminated soils. Environ Sci Technol 27 1693-1695. [Pg.459]

Keywords environmental samples elemental and isotopic analysis laser mass spectrometry technology transfer... [Pg.149]

Express and easy sample preparation - the homogeneity of the sample is of primary importance in laser mass spectrometry. The preparation of environmental samples includes pure physical manipulation. In the case of ... [Pg.158]

Analytical control and justification of the measurement with parallel methods - in literature, a great number of publications discuss the question of verification of analytical data. Many authors point to the reality to obtain false results even with highly sensitive devices and precision measurement procedures [Lieth and Markert, 1988], The verification of the measurement accuracy of laser mass spectrometry (LASMA device in particular) could... [Pg.159]

Reproducibility of measurement - the best results for laser mass spectrometry, reported in literature, point standard deviations better than 8%. In respect to environmental analysis, the decisive factor is the homogeneity of the sample and the quality of the reference material. [Pg.160]

Boesl, U. "Laser Mass Spectrometry for Environmental and Industrial Chemical Trace Analysis." Journal of Mass Spectrometry 35 (2000) 289-304. [Pg.287]


See other pages where Laser mass spectrometry is mentioned: [Pg.735]    [Pg.756]    [Pg.74]    [Pg.391]    [Pg.26]    [Pg.27]    [Pg.37]    [Pg.606]    [Pg.444]    [Pg.391]    [Pg.606]    [Pg.260]    [Pg.285]    [Pg.286]    [Pg.215]    [Pg.53]    [Pg.189]    [Pg.189]    [Pg.158]    [Pg.159]    [Pg.160]    [Pg.598]   
See also in sourсe #XX -- [ Pg.290 ]

See also in sourсe #XX -- [ Pg.428 ]

See also in sourсe #XX -- [ Pg.290 ]

See also in sourсe #XX -- [ Pg.149 ]

See also in sourсe #XX -- [ Pg.596 ]

See also in sourсe #XX -- [ Pg.548 ]

See also in sourсe #XX -- [ Pg.94 ]




SEARCH



Combination of Molecular Beam Laser Spectroscopy and Mass Spectrometry

Femtosecond laser mass spectrometry

Femtosecond-laser ablation-inductively coupled-plasma mass spectrometry

Imaging mass spectrometry matrix-assisted laser desorption/ionization

Inductively coupled plasma mass spectrometry laser ablation-ICPMS

Inorganic ions, laser ionization mass spectrometry

LASER IONISATION MASS SPECTROMETRY

Laser Ionization Mass Spectrometry, LIMS

Laser ablation inductively coupled plasma isotope dilution mass spectrometry

Laser ablation inductively coupled plasma-mass spectrometry

Laser ablation mass spectrometry

Laser ablation mass spectrometry , polymer

Laser ablation mass spectrometry analysis

Laser ablation multicollector inductively coupled plasma mass spectrometry

Laser desorption ionization mass spectrometry

Laser desorption mass spectrometry LDMS)

Laser desorption mass spectrometry, enzymatic

Laser desorption mass spectrometry, enzymatic digests

Laser desorption-Fourier transform mass spectrometry

Laser desorption/ionization mass spectrometry LDI-MS)

Laser desorption/ionization mass spectrometry MALDI

Laser desorption/ionization mass spectrometry layers

Laser desorption/ionization mass spectrometry organic material analysis using

Laser desorption/ionization mass spectrometry overview

Laser desorption/ionization mass spectrometry quantitation

Laser desorption/ionization mass spectrometry sample preparation

Laser desorption/ionization mass spectrometry techniques

Laser in mass spectrometry

Laser inductively coupled plasma-mass spectrometry

Laser ionization mass spectrometry

Laser microprobe mass spectrometry

Laser microprobe mass spectrometry (LAMMA

Laser microprobe mass spectrometry (LMMS

Laser microprobe mass spectrometry LAMMS)

Laser microprobe mass spectrometry instrumentation

Laser microprobe mass spectrometry, for

Laser probe mass spectrometry

Laser secondary neutral mass spectrometry

Laser spectrometry

Laser thermal ionization mass spectrometry

Laser vaporization mass spectrometry

Laser-Assisted Field Desorption Mass Spectrometry

Laser-desorption mass spectrometry

Laser-induced acoustic desorption/electrospray ionization mass spectrometry

Laser-induced breakdown-mass spectrometry

Laser-induced desorption mass spectrometry

Laser-induced desorption mass spectrometry techniques

Malaria detection by laser desorption mass spectrometry

Mass Spectrometry Basics laser

Mass spectrometry laser ablation inductively coupled

Mass spectrometry laser photoionization

Mass spectrometry matrix-assisted laser desorption

Mass spectrometry matrix-assisted laser desorption ionisation

Mass spectrometry matrix-assisted laser desorption ionization

Mass spectrometry matrix-enhanced surface-assisted laser

Mass spectrometry surface-enhanced laser desorption ionization

Mass spectrometry, matrix-assisted laser

Matrix Assisted Laser Desorption Ionization-Time of Flight-Mass Spectrometry (MALDI-TOF-MS)

Matrix assisted laser desorption ionization MALDI) mass spectrometry

Matrix-Assisted Laser Desorption Ionisation Mass Spectrometry (MALDI MS)

Matrix-assisted laser desorption imaging mass spectrometry

Matrix-assisted laser desorption ionisation MALDI) mass spectrometry

Matrix-assisted laser desorption ionisation-time of flight mass spectrometry

Matrix-assisted laser desorption ionization Fourier transform mass spectrometry

Matrix-assisted laser desorption ionization mass spectrometry instrumentation

Matrix-assisted laser desorption ionization time-of-flight mass spectrometry

Matrix-assisted laser desorption mass spectrometry, MALDI

Matrix-assisted laser desorption resonance mass spectrometry

Matrix-assisted laser desorption/ionization in imaging mass spectrometry

Matrix-enhanced surface-assisted laser desorption/ionization mass spectrometry

Quadrupole mass spectrometry laser ablation

Scanning Laser Microprobe Mass Spectrometry

© 2024 chempedia.info