Analytical Chemistry | CU Experts

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Exploring the Potential of Electrospray-Orbitrap for Stable Isotope Analysis Using Nitrate as a Model 2021
Characterization of Single-Cell Osmotic Swelling Dynamics for New Physical Biomarkers 2021
Evaluation of a New Reagent-Ion Source and Focusing Ion-Molecule Reactor for Use in Proton-Transfer-Reaction Mass Spectrometry 2018
Identification of Proprietary Amino Ethoxylates in Hydraulic Fracturing Wastewater Using Liquid Chromatography/Time-of-Flight Mass Spectrometry with Solid-Phase Extraction 2018
Laser Ablation-Aerosol Mass Spectrometry-Chemical Ionization Mass Spectrometry for Ambient Surface Imaging 2018
Critical Comparison of FRET-Sensor Functionality in the Cytosol and Endoplasmic Reticulum and Implications for Quantification of Ions 2017
Droplet Microfluidic Flow Cytometer For Sorting On Transient Cellular Responses Of Genetically-Encoded Sensors 2017
Microfluidic System for In-Flow Reversible Photoswitching of Near Infrared Fluorescent Proteins 2016
Ultrasensitive Plasmonic Platform for Label-Free Detection of Membrane-Associated Species 2016
Construction of Training Sets for Valid Calibration of in Vivo Cyclic Voltammetric Data by Principal Component Analysis 2015
Formation of Silver Nanostructures by Rolling Circle Amplification Using Boranephosphonate-Modified Nucleotides 2015
Long Working-Distance Optical Trap for in Situ Analysis of Contact-Induced Phase Transformations 2015
High-Speed Multiparameter Photophysical Analyses of Fluorophore Libraries 2015
Optically Diffracting Hydrogels for Screening Kinase Activity in Vitro and in Cell Lysate: Impact of Material and Solution Properties 2015
Elemental Analysis of Complex Organic Aerosol Using Isotopic Labeling and Unit-Resolution Mass Spectrometry 2015
Analysis of Hydraulic Fracturing Flowback and Produced Waters Using Accurate Mass: Identification of Ethoxylated Surfactants 2014
Single-Molecule Insights into Retention at a Reversed-Phase Chromatographic Interface 2014
Standing Surface Acoustic Wave Based Cell Coculture 2014
Determination of Nanoparticle Surface Coatings and Nanoparticle Purity Using Microscale Thermogravimetric Analysis 2014
RAMSY: Ratio Analysis of Mass Spectrometry to Improve Compound Identification 2013
Analytical Methodologies for the Detection of Sucralose in Water 2013
An On-Chip, Multichannel Droplet Sorter Using Standing Surface Acoustic Waves 2013
Simultaneous All-Optical Determination of Molecular Concentration and Extinction Coefficient 2013
Microfluidic Flow Cytometer for Quantifying Photobleaching of Fluorescent Proteins in Cells 2012
Amplified Protein Detection through Visible Plasmon Shifts in Gold Nanocrystal Solutions from Bacteriophage Platforms 2011
Characterizing the Morphology of Organic Aerosols at Ambient Temperature and Pressure 2010
Identification of a New Antidepressant and its Glucuronide Metabolite in Water Samples Using Liquid Chromatography/Quadrupole Time-of-Flight Mass Spectrometry 2010
Real-time Atmospheric Chemistry Field Instrumentation 2010
Incorporation of the Fluorescent Ribonucleotide Analogue tCTP by T7 RNA Polymerase 2010
High Density Labeling of Polymerase Chain Reaction Products with the Fluorescent Base Analogue tCo 2009
Determination of inlet transmission and conversion efficiencies for in situ measurements of the nocturnal nitrogen oxides, NO₃, N₂O₅ and NO₂, via pulsed cavity ring-down spectroscopy 2008
Real-Time Detection and Identification of Aqueous Chlorine Transformation Products Using QTOF MS 2008
Elemental analysis of organic species with electron ionization high-resolution mass spectrometry 2007
Diagnostic microarray for influenza B viruses 2007
Fluorescence lifetime standards for time and frequency domain fluorescence spectroscopy 2007
Identification of A/H5N1 influenza viruses using a single gene diagnostic microarray 2007
Field-deployable, high-resolution, time-of-flight aerosol mass spectrometer 2006
MChip: A tool for influenza surveillance 2006
High-resolution and accurate mass analysis of xenobiotics in food 2006
Detection of antigens in biologically complex fluids with photografted whole antibodies 2006
Improving sensitivity in shotgun proteomics using a peptide-centric database with reduced complexity: Protease cleavage and SCX elution rules from data mining of MS/MS spectra 2006
Characterization of a membrane-based, electrochemically driven pumping system using aqueous electrolyte solutions 2005
Measuring the mass of an electron by LC/TOF-MS: A study of "twin ions" 2005
Quantitation and accurate mass analysis of pesticides in vegetables by LC/TOF-MS 2005
Improving reproducibility and sensitivity in identifying human proteins by shotgun proteomics 2004
Combination of LC/TOF-MS and LC/ion trap MS/MS for the identification of diphenhydramine in sediment samples 2004
Intramolecular isobaric fragmentation: A curiosity of accurate mass analysis of sulfadimethoxine in pond water 2004
Chemical ionization mass spectrometer instrument for the measurement of tropospheric HO₂ and RO₂ 2003
Temperature-induced apparent mass changes observed during quartz crystal microbalance measurements of atomic layer deposition 2003
Linker-assisted immunoassay and liquid chromatography/mass spectrometry for the analysis of glyphosate 2002
Simultaneous multiple substrate tag detection with ESI-ion trap MS for in vivo bacterial enzyme activity profiling 2002
Accelerated solvent extraction followed by on-line solid-phase extraction coupled to ion trap LC/MS/MS for analysis of benzalkonium chlorides in sediment samples 2002
Choosing between atmospheric pressure chemical ionization and electrospray ionization interfaces for the HPLC/MS analysis of pesticides 2001
Electrochemical determination of dissolution rates of lyophilized pharmaceutical formulations 2001
Analysis of trace levels of sulfonamide and tetracycline antimicrobials, in groundwater and surface water using solid-phase extraction and liquid chromatography/mass spectrometry 2001
A method for measuring vapor pressures of low-volatility organic aerosol compounds using a thermal desorption particle beam mass spectrometer 2001
Formaldehyde in human cancer cells: Detection by preconcentration-chemical ionization mass spectrometry 2001
Molecular resolution and fragmentation of fulvic acid by electrospray ionization/multistage tandem mass spectrometry 2001
Depth-profiling and diffusion measurements in ice films using infrared laser resonant desorption 2000
Selective trace enrichment of chlorotriazine pesticides from natural waters and sediment samples using terbuthylazine molecularly imprinted polymers 2000
Compound identification in organic aerosols using temperature-programmed thermal desorption particle beam mass spectrometry 1999
Double-disk solid-phase extraction: Simultaneous cleanup and trace enrichment of herbicides and metabolites from environmental samples 1999
Time-dependent permeance of gas mixtures through zeolite membranes 1999
Isolation of priority polycyclic aromatic hydrocarbons from natural sediments and sludge reference materials by an anti-fluorene immunosorbent followed by liquid chromatography and diode array detection 1998
Detection of argon by Penning ionization and competitive absorption using a sensitized photoionization detector 1998
Investigation of anion-exchange and immunoaffinity particle-loaded membranes for the isolation of charged organic analytes from water 1998
Solid phase microextraction with temperature-programmed desorption for the analysis of iodination disinfection byproducts 1998
Identification of ionic chloroacetanilide-herbicide metabolites in surface water and groundwater by HPLC/MS using negative ion spray 1997
Immunosorbents coupled on line with liquid chromatography atmospheric pressure chemical ionization mass spectrometry for the part per trillion level determination of pesticides in sediments and natural waters using low preconcentration volumes 1997
Dual-inlet chemical amplifier for atmospheric peroxy radical measurements 1996
SUPERCRITICAL-FLUID EXTRACTION GAS-CHROMATOGRAPHIC ANALYSIS OF ORGANIC-COMPOUNDS IN ATMOSPHERIC AEROSOLS 1995
AQUEOUS NITRITE ION DETERMINATION BY SELECTIVE REDUCTION AND GAS-PHASE NITRIC-OXIDE CHEMILUMINESCENCE 1995
KINETICS OF REDUCTION OF DIMETHYLFERROCENIUM ION IN ACETONITRILE AT NEARLY IDEAL REGIONS OF N-TUNGSTEN DISELENIDE ELECTRODES 1994
SULFUR-SELECTIVE DETECTOR FOR LIQUID-CHROMATOGRAPHY BASED ON SULFUR MONOXIDE-OZONE CHEMILUMINESCENCE 1994
DETERMINATION OF ALACHLOR AND ITS SULFONIC-ACID METABOLITE IN WATER BY SOLID-PHASE EXTRACTION AND ENZYME-LINKED-IMMUNOSORBENT-ASSAY 1994
COUPLING SOLID-PHASE EXTRACTION AND ENZYME-LINKED-IMMUNOSORBENT-ASSAY FOR ULTRATRACE DETERMINATION OF HERBICIDES IN PRISTINE WATER 1993
MIXED-MODE ISOLATION OF TRIAZINE METABOLITES FROM SOIL AND AQUIFER SEDIMENTS USING AUTOMATED SOLID-PHASE EXTRACTION 1992
DEVELOPMENT AND CHARACTERIZATION OF A TITANIUM DIOXIDE-BASED SEMICONDUCTOR PHOTOELECTROCHEMICAL DETECTOR 1992
DESIGN AND PERFORMANCE OF A MINIELECTROCHEMICAL CELL FOR SPATIAL-RESOLUTION OF 2-DIMENSIONAL STRUCTURES 1991
ENZYME-LINKED-IMMUNOSORBENT-ASSAY COMPARED WITH GAS-CHROMATOGRAPHY MASS-SPECTROMETRY FOR THE DETERMINATION OF TRIAZINE HERBICIDES IN WATER 1990
SIMPLE JET ELECTRODES FOR KINETIC AND SYNTHETIC PURPOSES 1988
DETERMINATION OF ALKYLBENZENESULFONATE SURFACTANTS IN GROUNDWATER USING MACRORETICULAR RESINS AND C-13 NUCLEAR-MAGNETIC-RESONANCE SPECTROMETRY 1987
ELECTROKINETIC RESOLUTION OF AMINO-ACID ENANTIOMERS WITH COPPER(II) ASPARTAME SUPPORT ELECTROLYTE 1987
CIRCUIT FOR OPTIMALLY MATCHING INSTRUMENTAL OUTPUT VOLTAGE LEVELS TO THE INPUT VOLTAGE LEVELS OF ANALOG-TO-DIGITAL CONVERTERS 1985
RAPID SAMPLING AND ANALYSIS OF VOLATILE CONSTITUENTS OF AIRBORNE PARTICULATE MATTER 1985
REDOX CHEMI-LUMINESCENCE DETECTOR - APPLICATION TO GAS-CHROMATOGRAPHY 1985
SELECTIVE RETENTION OF OXYGEN USING CHROMATOGRAPHIC COLUMNS CONTAINING METAL CHELATE POLYMERS 1985
MEASUREMENT OF ATMOSPHERIC PEROXY-RADICALS BY CHEMICAL AMPLIFICATION 1984
MICROANALYSIS OF REACTION-PRODUCTS IN SEALED TUBE WET AIR OXIDATIONS BY CAPILLARY GAS-CHROMATOGRAPHY 1984
SYNTHESIS AND CHARACTERIZATION OF A NEW SORBENT FOR USE IN THE DETERMINATION OF VOLATILE, COMPLEX-FORMING ORGANIC-COMPOUNDS IN AIR 1984
ANALYTICAL-CHEMISTRY - A USEFUL TEACHING AID IN INSTRUMENTAL ANALYSIS COURSES 1983
CONVERSION OF NITROGEN-DIOXIDE, NITRIC-ACID, AND NORMAL-PROPYL NITRATE TO NITRIC-OXIDE BY GOLD-CATALYZED REDUCTION WITH CARBON-MONOXIDE 1983
LUMINOL-BASED NITROGEN-DIOXIDE DETECTOR 1983
BINUCLEAR SHIFT-REAGENTS FOR NUCLEAR MAGNETIC-RESONANCE SPECTROMETRY OF AROMATIC AND POLYCYCLIC AROMATIC-COMPOUNDS 1982
WATER-SOLUBLE PARAMAGNETIC RELAXATION REAGENTS FOR C-13 NUCLEAR MAGNETIC-RESONANCE SPECTROMETRY 1982
BINUCLEAR COMPLEXES OF LANTHANIDE(III) AND SILVER(I) AND THEIR FUNCTION AS SHIFT-REAGENTS FOR OLEFINS, AROMATICS, AND HALOGENATED COMPOUNDS 1981
VINYL-CHLORIDE DETECTION AT SUB-PARTS-PER-BILLION LEVELS WITH A CHEMICALLY SENSITIZED ELECTRON-CAPTURE DETECTOR 1980
COMPARISON OF XAD MACROPOROUS RESINS FOR THE CONCENTRATION OF FULVIC-ACID FROM AQUEOUS-SOLUTION 1979
ENHANCEMENT OF ELECTRON-CAPTURE DETECTOR SENSITIVITY TO NONELECTRON ATTACHING COMPOUNDS BY ADDITION OF NITROUS-OXIDE TO THE CARRIER GAS 1979
SEPARATION OF HUMIC SUBSTANCES BY PH GRADIENT DESORPTION FROM A HYDROPHOBIC RESIN 1979
COMPARISON OF DIFFERENT EXPERIMENTAL CONFIGURATIONS IN PULSED LASER-INDUCED MOLECULAR FLUORESCENCE 1978
ELECTROCHEMISTRY OF RUTHENIUM(3+,2+) COUPLE ATTACHED TO GRAPHITE ELECTRODES 1978
GAS-CHROMATOGRAPHIC INJECTOR ATTACHMENT FOR DIRECT INSERTION AND REMOVAL OF A POROUS POLYMER SORPTION TRAP 1978
PREDICTION OF CAPACITY FACTORS FOR AQUEOUS ORGANIC SOLUTES ADSORBED ON A POROUS ACRYLIC RESIN 1978
OPEN-PORE POLYURETHANE COLUMNS FOR COLLECTION AND PRECONCENTRATION OF POLYNUCLEAR AROMATIC-HYDROCARBONS FROM WATER 1977
DETERMINATION OF CHROMIUM IN HUMAN-BLOOD SERUM BY GAS-CHROMATOGRAPHY WITH A MICROWAVE EXCITED EMISSION DETECTOR 1976
SIMPLE AND SENSITIVE LOW TEMPERATURE CONTROL APPARATUS FOR MOSSBAUER SPECTROSCOPY 1967

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