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Detection of Cellulose-Derived Chromophores by Ambient Ionization-MS
Analytical Chemistry, 2016The detection of individual chromophores that contribute to the overall discoloration of paper ("yellowing") is a challenge because those substances are only present in very small amounts. In this research, two analytical approaches based on ambient ionization techniques, namely, desorption electrospray ionization and paper spray, both coupled to mass ...
Andreas, Schedl +5 more
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Easy Ambient Sonic-Spray Ionization
2014The principles and major applications of one of the simpliest and easiest mass spectrometric techniques, that is, easy ambient sonic-spray ionization (EASI), able to effficiently desorb and ionize analytes at ambient conditions, is described. Several benefitial figures-of-merit for EASI are discussed and the EASI benefits of enhanced selectivity and S ...
Carlos H. V. Fidelis, Marcos N. Eberlin
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Ambient Ionization Mass Spectrometry Measurement of Aminotransferase Activity
Journal of the American Society for Mass Spectrometry, 2017A change in enzyme activity has been used as a clinical biomarker for diagnosis and is useful in evaluating patient prognosis. Current laboratory measurements of enzyme activity involve multi-step derivatization of the reaction products followed by quantitative analysis of these derivatives.
Xin, Yan +4 more
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The Effect of Variations in the Ambient Air on the calibration and use of Ionization Dosemeters
Physics in Medicine and Biology, 1960The effects of variations in ambient air on absolute measurements of roentgens by cavity ionization chambers are examined. (J.R.D.)
G P, BARNARD, G H, ASTON, A R, MARSH
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Analytical Chemistry, 2016
Plasma-based ambient desorption/ionization sources are versatile in that they enable direct ionization of gaseous samples as well as desorption/ionization of analytes from liquid and solid samples. However, ionization matrix effects, caused by competitive ionization processes, can worsen sensitivity or even inhibit detection all together.
Sunil P, Badal +4 more
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Plasma-based ambient desorption/ionization sources are versatile in that they enable direct ionization of gaseous samples as well as desorption/ionization of analytes from liquid and solid samples. However, ionization matrix effects, caused by competitive ionization processes, can worsen sensitivity or even inhibit detection all together.
Sunil P, Badal +4 more
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Analytical and Bioanalytical Chemistry, 2014
Ambient desorption/ionization (ADI) sources coupled to mass spectrometry (MS) offer outstanding analytical features: direct analysis of real samples without sample pretreatment, combined with the selectivity and sensitivity of MS. Since ADI sources typically work in the open atmosphere, ambient conditions can affect the desorption and ionization ...
Jaime, Orejas +5 more
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Ambient desorption/ionization (ADI) sources coupled to mass spectrometry (MS) offer outstanding analytical features: direct analysis of real samples without sample pretreatment, combined with the selectivity and sensitivity of MS. Since ADI sources typically work in the open atmosphere, ambient conditions can affect the desorption and ionization ...
Jaime, Orejas +5 more
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The Luminescence of Water Excited by Ambient Ionizing Radiation
Radiation Research, 1971A nondecaying weak luminescence of intensity 1.5 ± 0.1 photons ${\rm sec}^{-1}\ {\rm ml}^{-1}$ has been observed from purified water exposed to ambient ionizing radiation. The structured emission spectrum and the observed quenching by dissolved oxygen, indicated that a substantial portion of the luminescence was non-Cerenkov emisson.
T. I. Quickenden, S. S. Que Hee
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Seeding of ambient electrons in critical velocity ionization
1990 Plasma Science IEEE Conference Record - Abstracts, 1990Summary form only given. Despite repeated demonstration of high ionization efficiencies in critical ionization velocity (CIV) experiments in the laboratory, much lower efficiencies have been reported in space CIV experiments. A survey of the CIV experiments in space reveals that higher ambient electron density appears to favor ionization.
S.T. Lai, E. Murad, W.J. McNeil
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The Journal of Physical Chemistry A
Microdroplet chemistry has been utilized in different fields due to a plethora of unique properties such as the existence of a high electric field up to 109 V/m at the surface of the microdroplets or between two oppositely charged microdroplets. Such a high field endows microdroplets with the ability of ionizing ambient air.
Bowen Li +3 more
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Microdroplet chemistry has been utilized in different fields due to a plethora of unique properties such as the existence of a high electric field up to 109 V/m at the surface of the microdroplets or between two oppositely charged microdroplets. Such a high field endows microdroplets with the ability of ionizing ambient air.
Bowen Li +3 more
openaire +2 more sources