نتایج جستجو برای: headspace solid phase microextraction

تعداد نتایج: 755834  

2015
Somchai Rice Jacek A. Koziel John I. Glendinning

Recent U.S. legislation permitting recreational use of marijuana in certain states brings the use of marijuana odor as probable cause for search and seizure to the forefront of forensic science, once again. This study showed the use of solid-phase microextraction with multidimensional gas chromatography--mass spectrometry and simultaneous human olfaction to characterize the total aroma of marij...

Journal: :Analytical and bioanalytical chemistry 2015
F Aladar Bencsath Ronald A Benner Ann Abraham Yuesong Wang Kathleen R El Said Edward L E Jester Steven M Plakas

A headspace solid-phase microextraction gas chromatography-mass spectrometry (SPME GC-MS) method is described, to screen seafood for volatile organic compounds (VOCs) associated with petrochemical taint. VOCs are extracted from the headspace of heated sample homogenates by adsorption onto a SPME fiber and desorbed for analysis by GC-MS. Targeted compounds are determined semi-quantitatively usin...

Journal: :Chemosphere 2006
Sue-Min Chang Ruey-An Doong

The concentration and fate of persistent organochlorine pesticides (OCPs) in estuarine surface sediments in Erh-jen and Lan-yang rivers, Taiwan were investigated using headspace solid-phase microextraction (HSSPME) method to evaluate the possible pollution potential and guideline for OCP concentrations in Taiwan. The HSSPME method exhibits a good analytical performance with low detection limits...

Journal: :Molecules 2014
Chih-Hsin Yeh Wan-Yu Tsai Hsiu-Mei Chiang Chin-Sheng Wu Yung-I Lee Li-Yun Lin Hsin-Chun Chen

Phalaenopsis is the most important economic crop in the Orchidaceae family. There are currently numerous beautiful and colorful Phalaenopsis flowers, but only a few species of Phalaenopsis have an aroma. This study reports the analysis volatile components present in P. Nobby's Pacific Sunset by solid-phase microextraction (SPME) coupled with gas chromatography (GC) and gas chromatography/mass s...

Journal: :Food additives & contaminants. Part B, Surveillance 2008
Xu-Liang Cao Jeannette Corriveau

A method based on isotope dilution headspace solid-phase microextraction and gas chromatography/mass spectrometry was used to assess levels of bisphenol A (BPA) in 56 samples of bottled water products sold in Canada. Levels of BPA in samples of all 51 non-polycarbonate (PC) bottled water products were lower than the method detection limit (0.50 µg l(-1)). Levels of BPA in most bottled water pro...

2013
Adriana P. Arisseto Eduardo Vicente Maria Cecília F. Toledo

Furan is a food processing contaminant classified as possibly carcinogenic to humans. As the occurrence of furan has been reported in a variety of foods processed in sealed containers, the objective of this work was to investigate if the contaminant can be found in home-cooked foods prepared in a pressure cooker. For that, several foods including beans, soy beans, whole rice, beef, pork, potato...

2013
MARIUS ROMAN CECILIA ROMAN

Two gas chromatography extraction methods based on liquid-liquid (LLE) and headspace solid phase microextraction (HS-SPME) were evaluated for analysis of furfural from hemicellulose hydrolysates. Woody biomass was used as renewable resource for furfural production. In this study, autohydrolysis pretreatment was investigated for conversion of xylose and arabinose into furfural at selected ranges...

Journal: :Journal of dairy science 2006
P A Vazquez-Landaverde J A Torres M C Qian

Volatile sulfur compounds have been reported to be responsible for the sulfurous off-flavors generated during the thermal processing of milk; however, their analysis has been a challenge due to their high reactivity, high volatility, and low sensory threshold. In this study, reactive thiols were stabilized and the volatile sulfur compounds in milk were extracted by headspace solid-phase microex...

Journal: :Molecules 2011
Chang-Bin Wei Sheng-Hui Liu Yu-Ge Liu Ling-Ling Lv Wen-Xiu Yang Guang-Ming Sun

Characteristic aroma volatile compounds from different parts of cayenne pineapple were analyzed by headspace-solid phase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC/MS). The main volatile compounds were esters, terpenes, ketones and aldehydes. The number and content of aroma compounds detected in pulp were higher than those found in core. In pulp, the characteristic a...

Journal: :Journal of Chromatographic Science 2000

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