Filters
total: 3251
displaying 1000 best results Help
Search results for: ANALYTICAL NOTATION
-
Application of Bayesian Multilevel Modeling in the Quantitative Structure–Retention Relationship Studies of Heterogeneous Compounds
Publication -
Determination of pKa by pH Gradient Reversed-Phase HPLC
Publication -
Analysis of Isocratic-Chromatographic-Retention Data using Bayesian Multilevel Modeling
Publication -
How Much Can We Learn from a Single Chromatographic Experiment? A Bayesian Perspective
Publication -
Maximum A Posteriori Bayesian Estimation of Chromatographic Parameters by Limited Number of Experiments
Publication -
Simultaneous Determination of pKa and Lipophilicity by Gradient RP HPLC
Publication -
pH/Organic Solvent Double-Gradient Reversed-Phase HPLC
Publication -
Influence of pH on Retention in Linear Organic Modifier Gradient RP HPLC
Publication -
Reactions of NO2 with chromium(III) complexes with histamine and pyridoxamine ligands studied by the stopped-flow technique
Publication -
Influence of the Extraction Conditions on the Antifungal Properties of Walnut Green Husk Isolates
Publication -
A simple modification to improve the accuracy of methylation-sensitive restriction enzyme quantitative polymerase chain reaction
PublicationDNA digestion with endonucleases sensitive to CpG methylation such as HpaII followed by polymerase chain reaction (PCR) quantitation is commonly used in molecular studies as a simple and inexpensive solution for assessment of region-specific DNA methylation. We observed that the results of such analyses were highly overestimated if mock-digested samples were applied as the reference.We determined DNA methylation levels in several...
-
Solid phase microextraction–comprehensive twodimensional gas chromatography–time-of-flight mass spectrometry: a new tool for determining PAHs in airport runoff water samples
Publicationfundamental aspect of airport operations is the pollution caused by airport runoff waters. Polycyclic aromatic hydrocarbons (PAHs) are one of the most important groups of xenobiotics which are commonly found in runoff water originating from airports. Only very limited data on the analysis of airport runoff water have been published until now. Therefore, a reliable and accurate analytical method based on headspace solid-phase microextraction...
-
Application of dynamic headspace and gas chromatography coupled to mass spectrometry (DHS-GC-MS) for the determination of oxygenated volatile organic compounds in refinery effluents
PublicationThe paper presents a new procedure for the determination of oxygenated volatile organic compounds (O-VOCs) in postoxidative effluents from the production of petroleum asphalt using dynamic headspace coupled to gas chromatography-mass spectrometry in the selected ion monitoring (SIM) mode (DHSGC-MS). Among the GC capillary columns tested, a polar SLB-IL111 column with the ionic liquid stationary phase was found to be superior due...
-
The application of isotopically labeled analogues for the determination of small organic compounds by GC/MS with selected ion monitoring
Publication -
PEDOT(PSS) as Solid Contact for Ion-Selective Electrodes: The Influence of the PEDOT(PSS) Film Thickness on the Equilibration Times
Publication -
Accurate, Direct, and High-Throughput Analyses of a Broad Spectrum of Endogenously Generated DNA Base Modifications with Isotope-Dilution Two-Dimensional Ultraperformance Liquid Chromatography with Tandem Mass Spectrometry: Possible Clinical Implication
Publication -
Solid-Contact Ion-Selective Electrodes with Highly Selective Thioamide Derivatives of p-tert-Butylcalix[4]arene for the Determination of Lead(II) in Environmental Samples
Publication -
Equilibration Time of Solid Contact Ion-Selective Electrodes
Publication -
Solid-Contact pH Sensor without CO2Interference with a Superhydrophobic PEDOT-C14as Solid Contact: The Ultimate “Water Layer” Test
Publication -
Calibration in Metrological Approach
Publication -
Quantitative structure–retention relationships of ionic liquid cations in characterization of stationary phases for HPLC
Publication -
Different detection and stacking techniques in capillary electrophoresis for metabolomics
Publication -
Chemically Bonded Silica Stationary Phases: Synthesis, Physicochemical Characterization, and Molecular Mechanism of Reversed-Phase HPLC Retention
Publication -
Picomolar analysis of flavins in biological samples by dynamic pH junction-sweeping capillary electrophoresis with laser-induced fluorescence detection
Publication -
Sample Concentration of Charged Small Molecules and Peptides in Capillary Electrophoresis by Micelle to Cyclodextrin Stacking
Publication -
Solid-Phase Microextraction for the Determination of Inorganic Ions: Applications and Possibilities
Publication -
The simultaneous detection of food dyes from different samples in a 96-well plate by spectrophotometry
Publication -
Application of an iron-based porphyrinic metal–organic framework for removal of warfarin from aqueous solutions
Publication -
Rapid and sensitive determination of acrylamide in potato crisps using reversed-phase direct immersion single drop microextraction-gas chromatography
Publication -
Recent developments in the determination of residual solvents in pharmaceutical products by microextraction methods
Publication -
Determination of nicotine in saliva, urine and wastewater samples using tantalum metal organic framework pipette tip micro-solid phase extraction
Publication -
Salt saturated single-drop microextraction of malondialdehyde from human plasma before its determination by gas chromatography
Publication -
Molecularly imprinted stir bar sorptive extraction coupled with atomic absorption spectrometry for trace analysis of copper in drinking water samples
Publication -
Developing a New Micro Cloud Point Extraction Method for Simultaneous Preconcentration and Spectrophotometric Determination of Uranium and Vanadium in Brine
Publication -
Simultaneous Removal of Heavy Metals from Wastewater Using Modified Sodium Montmorillonite Nanoclay
Publication -
Statistical theory of component overlap in multicomponent chromatograms
Publication -
Porous, High Capacity Coatings for Solid Phase Microextraction by Sputtering
Publication -
Room temperature ionic liquid-based dispersive liquid–liquid microextraction of uranium in water samples before spectrophotometric determination
Publication -
Headspace Solvent Microextraction
Publication -
Extraction of mass spectra free of background and neighboring component contributions from gas chromatography/mass spectrometry data
Publication -
Molecularly Imprinted Polymers for Stir Bar Sorptive Extraction: Synthesis, Characterization, and Application
Publication -
Miniaturization and Automation of an Internally Cooled Coated Fiber Device
Publication -
Headspace Liquid-Phase Microextraction of Chlorobenzenes in Soil with Gas Chromatography-Electron Capture Detection
Publication -
Determination of mefenamic acid in urine and pharmaceutical samples by HPLC after pipette-tip solid phase microextraction using zinc sulfide modified carbon nanotubes
Publication -
Determination of (S)-warfarin using an activated screen printed gold electrode modified with gold nanoparticles and an enantioselective molecularly imprinted polymer
Publication -
Application of Box–Behnken design in the optimization of a simple graphene oxide/zinc oxide nanocomposite-based pipette tip micro-solid phase extraction for the determination of Rhodamine B and Malachite green in seawater samples by spectrophotometry
Publication -
In-Tube Molecularly Imprinted Polymer Solid-Phase Microextraction for the Selective Determination of Propranolol
Publication -
Rapid and sensitive determination of fluoride in toothpaste and water samples using headspace single drop microextraction-gas chromatography
Publication -
Comparison of High Performance Liquid Chromatography Methods with Different Detectors for Determination of Steroid Hormones in Aqueous Matrices
PublicationThis paper presents the development and comparison of procedures for the qualitative and quantitative determination of five estrogenic compounds (17-a-ethynylestradiol, estrone, estradiol, estriol, and progesterone) in drinking water and wastewater samples. Five extraction columns and two disks were tested for their efficiency. The C18 columns were superior on the basis of cost for solid phase extraction of drinking water or sewage....
-
Determination of parent and methylated polycyclic aromatic hydrocarbons in water samples by dispersive liquid–liquid microextraction–two dimensional gas chromatography–time-of-flight mass spectrometry
PublicationPolycyclic aromatic hydrocarbons (PAHs) are contaminants frequently found in environmental waters. Owing to their toxic effects, it is important to develop analytical methodologies that allow their fast and reliable determination. Dispersive liquid–liquid microextraction (DLLME) allows a quick extraction of analytes with little organic solvent consumption. The best results regarding sample preparation are obtained when 40 mL of...