Results 171 to 180 of about 48,147 (228)
Characterization of primary aroma compounds in Pu-erh raw tea sourced from various regions using gas chromatography-mass spectrometry and headspace solid-phase microextraction. [PDF]
J Food SciDu L +7 more
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[Design and practice of undergraduate instrumental analysis experiment： analysis of polycyclic aromatic hydrocarbons in environmental water by solid-phase microextraction- liquid chromatography]. [PDF]
Se PuLiu J, Wu JY, Li JT, Chen NW, Huang XJ.
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Gas Chromatography-Mass Spectrometry Analysis of Volatile Organic Compounds from Three Endemic Iris Taxa: Headspace Solid-Phase Microextraction vs. Hydrodistillation. [PDF]
MoleculesFriščić M +8 more
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TrAC Trends in Analytical Chemistry, 1999
Abstract In recent years, much attention in analytical chemistry has been paid to sample preparation techniques, especially those which minimise the consumption of organic solvents. One of the most promising of these, solid-phase microextraction (SPME), is presented in both its theoretical and practical aspects.
Helena Prosen, Lucija Zupančič-Kralj
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Abstract In recent years, much attention in analytical chemistry has been paid to sample preparation techniques, especially those which minimise the consumption of organic solvents. One of the most promising of these, solid-phase microextraction (SPME), is presented in both its theoretical and practical aspects.
Helena Prosen, Lucija Zupančič-Kralj
+4 more sources
Multiple solid-phase microextraction
Journal of Chromatography A, 2000Theoretical aspects of multiple solid-phase microextraction are described and the principle is illustrated with the extraction of lidocaine from aqueous solutions. With multiple extraction under non-equilibrium conditions considerably less time is required in order to obtain an extraction yield that is equal to that of one extraction at equilibrium. On
Koster, EHM, de Jong, GJ
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2001
Solid Phase Microextraction (SPME) uses a small volume of sorbent dispersed typically on the surface of small fibres, to isolate and concentrate analytes from sample matrix. After contact with sample, analytes are absorbed or adsorbed by the fibre phase (depending on the nature of the coating) until an equilibrium is reached in the system.
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Solid Phase Microextraction (SPME) uses a small volume of sorbent dispersed typically on the surface of small fibres, to isolate and concentrate analytes from sample matrix. After contact with sample, analytes are absorbed or adsorbed by the fibre phase (depending on the nature of the coating) until an equilibrium is reached in the system.
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Solid-Phase Microextraction Field Sampler
Analytical Chemistry, 2004To facilitate the use of solid-phase microextraction (SPME) for field sampling, a new field sampler was designed and tested. The sampler was versatile and user-friendly. The SPME fiber can be positioned precisely inside the needle for time-weighted average sampling or exposed completely outside the needle for grab sampling.
Yong, Chen, Janusz, Pawliszyn
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Headspace solid-phase microextraction
Analytical Chemistry, 1993Headspace solid-phase microextraction is a solvent-free sample preparation technique in which a fused silica fiber coated with polymeric organic liquid is introduced into the headspace above the sample. The volatilized organic analytes are extracted and concentrated in the coating and then transferred to the analytical instrument for desorption and ...
Zhouyao. Zhang, Janusz. Pawliszyn
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