Browsing Krogh, Erik by Issue Date
Now showing items 1-20 of 34
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A novel thermally assisted membrane introduction mass spectrometry (MIMS) interface for the rapid and sensitive on-line measurement of volatile and semi-volatile organic contaminants in air and water at parts-per trillion level
(John Wiley & Sons, Inc., 2006-07-15)A coaxially heated membrane introduction mass spectrometry (MIMS) sampling interface is presented that demonstrates improved on-line performance for the direct measurement of semi-volatile organic compounds (SVOCs) in air ... -
[Pre-print] Modeling analyte permeation in cylindrical hollow fiber membrane introduction mass spectrometry
(Elsevier, 2008-11-15)The time-resolved signal generated from membrane introduction mass spectrometry (MIMS) has been modeled in cylindrical coordinates to analyze the data from MIMS experiments, in which a capillary hollow fiber selectively ... -
[Pre-print] The use of membrane introduction tandem mass spectrometry (MIMS-MS/MS) in field locations as an on-line quantitative environmental monitoring technique for trace contaminants in air and water
(Oxford University Press, 2009-01)Membrane introduction mass spectrometry (MIMS) is emerging as an important technique for on-line, real-time environmental monitoring. Because MIMS interfaces are simple and robust, they are ideally suited for operation in ... -
[Post-print] New pH-dependent photosubstitution pathways of syringic acid in aqueous solution: Relevance in environmental photochemistry
(Elsevier, 2009-09-25)The aqueous photochemistry of 4-hydroxy-3,5-dimethoxybenzoic acid (syringic acid) (1) and related compounds has been studied to investigate the novel pH-dependent photosubstitution pathways exhibited upon photolysis. ... -
[Post-print] On-line measurement of oxidative degradation kinetics for trace gasoline contaminants in aqueous solutions and natural water by membrane introduction tandem mass spectrometry
(Taylor & Francis Group, 2010-09-29)Membrane introduction mass spectrometry (MIMS) was used to directly monitor the loss of trace gasoline contaminants (benzene, toluene, 2-methylthiophene and methylcyclohexane) in nanomolar (ppb) aqueous solutions under a ... -
[Pre-print] Membrane introduction mass spectrometry (MIMS): A versatile tool for direct, real-time chemical measurements
(John Wiley & Sons, Inc., 2014-12)Membrane introduction mass spectrometry (MIMS) is a direct, continuous, online measurement technique. It utilizes a membrane to semi-selectively transfer analyte mixtures from a sample to a mass spectrometer, rejecting ... -
[Post-print] Photosensitized degradation kinetics of trace halogenated contaminants in natural waters using membrane introduction mass spectrometry as an in-situ reaction monitor
(Royal Society of Chemistry, 2015-11)The photochemically mediated dechlorination of polyhalogenated compounds represents a potential decontamination strategy and a relevant environmental process in chemically reducing media. We report the UV irradiation of ... -
[Post-print] A semi-quantitative approach for the rapid screening and mass profiling of naphthenic acids directly in contaminated aqueous samples
(John Wiley & Sons, Inc., 2016-01)We report the use of a direct sampling, online analytical approach for the determination of acid extractable naphthenic acids in complex aqueous samples, known as condensed phasemembrane introductionmass spectrometry ... -
[Post-print] Rapid screening of carboxylic acids from waste and surface waters by ESI-MS/MS using barium ion chemistry and on-line membrane sampling
(Springer, 2016-03)Negative ion tandem mass spectrometric analysis of aliphatic carboxylic acids often yields only non-diagnostic ([M-H]-) ions with limited selective fragmentation. However, carboxylates cationized with Ba2+ have ... -
[Pre-print] Polymer inclusion membranes with condensed phase membrane introduction mass spectrometry (CP-MIMS): Improved analytical response time and sensitivity
(American Chemical Society, 2017-05-16)Condensed phase membrane introduction mass spectrometry (CP-MIMS) is an online, in situ analysis technique for low volatility analytes. Analytes diffuse through a hollow fibre membrane, where they are then dissolved by ... -
[Pre-print] Paper spray mass spectrometry for the direct, semi-quantitative measurement of fentanyl and norfentanyl in complex matrices
(Elsevier, 2018)Background: Fentanyl is a potent, synthetic opioid at the centre of an international health crisis that has seen thousands of fatal overdoses. Most analytical methods focus on the detection of fentanyl in blood and/or ... -
[Post-print] Online measurement of phthalate-particulate matter interactions by membrane introduction mass spectrometry (MIMS)
(Taylor & Francis Group, 2018-02-23)To enable further study and assessment of indoor inhalation exposure risk, an online apparatus enabling measurement of semi-volatile compound partitioning on household particulates was developed. An example method for ... -
[Post-print] Discrimination of constructed air samples using multivariate analysis of full scan membrane introduction mass spectrometry (MIMS) data
(John Wiley & Sons, Inc., 2018-02-28)RATIONALE: Volatile and semi-volatile organic compounds (S/VOCs) are important atmospheric pollutants affecting both human and environmental health. They are directly measured as an unresolved mixture using membrane ... -
[Post-print] Paper spray mass spectrometry for the direct, semi-quantitative measurement of fentanyl and norfentanyl in complex matrices
(Elsevier, 2018-04)Background: Fentanyl is a potent, synthetic opioid at the centre of an international health crisis that has seen thousands of fatal overdoses. Most analytical methods focus on the detection of fentanyl in blood and/or ... -
Direct analysis of polyaromatic hydrocarbons in soil and aqueous samples using condensed phase membrane introduction tandem mass spectrometry with low energy liquid electron ionization
(American Chemical Society, 2018-12-18)Polyaromatic hydrocarbons (PAHs) are listed as priority pollutants by the US EPA. PAH contaminated samples often require extensive sample cleanup before analysis, with the method used dependent upon the sample matrix. ... -
Direct quantitation and characterization of fatty acids in salmon tissue by condensed phase membrane introduction mass spectrometry (CP-MIMS) using a modified donor phase
(Springer Nature, 2019-01)Existing mass spectrometric methods for the analysis of fatty acids often require derivatization, chromatographic separations and/or extensive sample preparation. Direct mass spectrometry strategies can avoid these ... -
Direct measurement of acid dissociation constants of trace organic compounds at nanmolar levels in aqueous solution by condensed phase membrane introduction mass spectrometry
(John Wiley & Sons, Inc., 2019-06-18)We report the use of condensed phase membrane introduction mass spectrometry as a novel method for the determination of acid dissociation constants for hydrophobic organic acids in aqueous solution at nanomolar concentrations. ... -
A new mass spectrometry based approach for organic synthesis monitoring
(American Chemical Society, 2019-08-12)Current mass spectrometry-based methodologies for synthetic organic reaction monitoring largely use electrospray ionization (ESI), or other related atmospheric pressure ionization-based approaches. Monitoring of ... -
Discrimination and geo-spatial mapping of atmospheric VOC sources using full scan direct mass spectral data collected from a moving vehicle
(Royal Society of Chemistry, 2020-01)Volatile and semi-volatile organic compounds (S/VOCs) are ubiquitous in the environment, come from a wide variety of anthropogenic and biogenic sources, and are important determinants of environmental and human health due ... -
Mapping the geospatial distribution of atmospheric BTEX compounds using portable mass spectrometry and adaptive whole air sampling
(Electronic version published by Vancouver Island University, 2020-03)Atmospheric environmental monitoring with mobile laboratories is becoming more common as instrumentation evolves and the benefits of taking the lab-to-sample are realized. One of the benefits of this approach is the ...
