Results 191 to 200 of about 10,894,647 (232)
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Microextraction techniques in therapeutic drug monitoring
Biomedical Chromatography, 2012ABSTRACTTherapeutic drug monitoring (TDM), as part of clinical process of medical treatments, is commonly used to maintain ‘therapeutic’ drug concentrations. TDM is useful to identify the causes of unwanted or unexpected responses, to prevent unnecessary diagnostic testing, to improve clinical outcomes, and even to save lives. The determination of drug
Khalil, Farhadi +2 more
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Microextraction Techniques in Breath Biomarker Analysis
Bioanalysis, 2014Breath volatile organic compound analysis may open a non-invasive window onto (patho)physiological and metabolic processes in the body. Breath tests require controlled sampling with respect to different breath phases and on-site and point-of-care applicability.
Wolfram, Miekisch +3 more
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Hollow fiber microextraction: a new hybrid microextraction technique for trace analysis
Analytical and Bioanalytical Chemistry, 2018A new hybrid microextraction technique (hollow fiber microextraction) is presented that uses the main concepts and advantages of the modern miniaturized devices used for trace analysis. This novel analytical approach uses devices made of polypropylene membranes (10.0 mm long and 0.6 mm internal diameter) in which convenient organic solvents are ...
Alessandra H, Ide +1 more
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Ionic liquids in the microextraction techniques: The influence of ILs structure and properties
, 2020Ionic liquids (ILs) are composed entirely of ions thus they possess unique properties, including negligible volatility, a liquid state in a broad range of temperatures and ability to change them depending on the chosen type of anion and cation, which ...
K. Yavir +3 more
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The Role of Liquid-Phase Microextraction Techniques in Bioanalysis
Bioanalysis, 2015Sample preparation is one of the most challenging tasks in laboratories, particularly in what concerns biological specimens, since they cannot be directly analyzed. A considerable amount of time and effort is spent in the extraction of the analytes and their concentration in a solvent that is compatible with analytical instrumentation.
Mário, Barroso +2 more
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Developments and applications of capillary microextraction techniques: A review
Analytica Chimica Acta, 2009Sample preparation is important for isolating desired components from complex matrices and greatly influences their reliable and accurate analysis. Recent trends in sample preparation include miniaturization, automation, high-throughput performance, and reduction in solvent consumption and operation time.
Hiroyuki, Kataoka +3 more
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Solid Phase Microextraction Techniques in Determination of Biomarkers
Critical Reviews in Analytical Chemistry, 2018The detection and quantification of biomarkers is gaining attention in medical research and diagnostics communities. Biomarkers cover a range from gases to biological macromolecules. Because of the nanomolar range levels of typical biomarkers in plasma, blood, urine, exhalation samples, and other biological fluids as well as complex matrix of ...
Samin, Hamidi +2 more
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Membrane-based microextraction techniques in analytical chemistry: A review
Analytica Chimica Acta, 2015The use of membrane-based sample preparation techniques in analytical chemistry has gained growing attention from the scientific community since the development of miniaturized sample preparation procedures in the 1990s. The use of membranes makes the microextraction procedures more stable, allowing the determination of analytes in complex and "dirty ...
Josias Merib, Eduardo Carasek
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Solvent-free microextraction techniques in gas chromatography
Analytical and Bioanalytical Chemistry, 2011Microextraction techniques represent a major part of modern sample preparation in the analysis of organic micropollutants. This article provides a short overview of recent developments in solvent-free microextraction techniques. From the first open-tubular trap techniques in the mid-1980s to recent packed-needle devices, different implementations of in-
Laaks, Jens +2 more
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Microextraction sample preparation techniques in biomedical analysis
Journal of Separation Science, 2014Biologically active compounds are found in biological samples at relatively low concentration levels. The sample preparation of target compounds from biological, pharmaceutical, environmental, and food matrices is one of the most time‐consuming steps in the analytical procedure. The microextraction techniques are dominant.
Malgorzata, Szultka +3 more
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