Solid-phase microextraction gas chromatography-mass spectrometry (SPME-GCMS) was used to show that dimethyl sulfide produced by Burkholderia pseudomallei is responsible for its unusual truffle-like smell and distinguishes the species from Burkholderia thailandensis. SPME-GCMS can be safely used to detect dimethyl sulfide produced by agar-grown B. pseudomallei.

The Koch-Haaf reaction of adamantanols was successfully carried out in a microflow system at room temperature. By combining an acid-tolerant hastelloy-made micromixer, a PTFE tube, and a hastelloy-made microextraction unit, a packaged reaction-to-workup system was developed. By means of the present system, the multigram scale synthesis of 1-adamantanecarboxylic acid was achieved in ca. one hour...

A new format of fast three-phase microextraction by combining low-density solvent-based dispersive liquid-liquid microextraction (DLLME) and single-drop microextraction (SDME) was for the first time developed for the determination of chlorophenols in environmental water samples. The extraction procedure includes a 2 min DLLME pre-extraction and a 10 min SDME back-extraction. A portion of low-de...

A novel method is reported, whereby screen-printed electrodes (SPELs) are combined with dispersive liquid-liquid microextraction. In-situ ionic liquid (IL) formation was used as an extractant phase in the microextraction technique and proved to be a simple, fast and inexpensive analytical method. This approach uses miniaturized systems both in sample preparation and in the detection stage, help...

A green and fast sample preparation method based on reversed-phase dispersive liquid–liquid microextraction was developed for the separation preconcentration of several elements in gasoline samples before ICP-OES determination.

Due to high complexity of most food matrices and the low concentration (ppb levels) of HAs, sensitive and selective analytical methodology is needed. Solid-phase extraction (SPE) is generally used. However it involve tedious and time-consuming and have intrinsic disadvantages like the use of toxic solvents and plugging of the cartridges. These drawbacks can be avoided by using solid-phase micro...

Lappeenranta University of Technology Faculty of Technology Degree Program in Environmental Technology Ville Luukkonen Determination of chlorophenols from water by solid phase microextraction – ion mobility spectrometry (SPME-IMS) Master’s thesis 2012 86 pages, 38 figures and 5 tables Examiners: Professor, D.Sc. (Tech.) Mika Sillanpää Lic.Sc. (Tech.) Simo Hammo Supervisor: M.Sc. Sanna Holopainen

Background: Fritillaria imperialis is an endangered species with pharmaceutical alkaloids that can be effective in reducing blood pressure and reducing cardiac palpitations.   Objective: Comparison of head space solid phase microextraction (HS-SPME) and hydro-distillation (HD) techniques in determination of essential oils in Fritillaria imperialis Methods: Quality and quantity determination o...

background and objectives: analytical methods for volatile organic compounds (vocs) in different samples need extraction of compounds, by applying hazardous solvents. solid phase micro-extraction (spme) is a solvent-free equilibrium extraction method, in which proper calibration can allow quantitative determinations of vocs at a very good sensitivity without the use of any organic solvent. vocs...