نتایج جستجو برای: spme solid phase microextraction

تعداد نتایج: 754919  

2015
Lingshuang Cai Jacek A. Koziel Matthew E. O’Neal Mary Boyce

Insects trigger plants to release volatile compounds that mediate the interaction with both pest and beneficial insects. Soybean aphids (Aphis glycines) induces soybean (Glycine max) leaves to produce volatiles that attract predators of the aphid. In this research, we describe the use of solid-phase microextraction (SPME) for extraction of volatiles from A. glycines-infested plant. Objectives w...

Journal: :Journal of chromatographic science 2008
Ning Li Yu Mao Chunhui Deng Xiangmin Zhang

Artemisia argyi leaf is a widely used traditional Chinese medicine (TCM). In this work, for the first time, the separation and identification of volatile constituents in Artemisia argyi flowers is performed. Gas chromatography-mass spectrometry (GC-MS) with solid-phase microextraction (SPME) is developed for the fast analysis of volatile constituents in the flowers. Several headspace SPME param...

2013
Zhisheng Xie Qundi Liu Zhikun Liang Mingqian Zhao Xiaoxue Yu Depo Yang Xinjun Xu

Volatile components from Exocarpium Citri Grandis (ECG) were, respectively, extracted by three methods, that is, steam distillation (SD), headspace solid-phase microextraction (HS-SPME), and solvent extraction (SE). A total of 81 compounds were identified by gas chromatography-mass spectrometry including 77 (SD), 56 (HS-SPME), and 48 (SE) compounds, respectively. Despite of the extraction metho...

Journal: :Journal of chromatography. A 2000
M F Alpendurada

Solid-phase microextraction (SPME) is a simple and effective adsorption and desorption technique, which eliminates the need for solvents or complicated apparatus, for concentrating volatile or nonvolatile compounds in liquid samples or headspace. SPME is compatible with analyte separation and detection by gas chromatography and high-performance liquid chromatography, and provides linear results...

Alireza Ghassempour Hanieh Malekzadeh Mohammad Fatemi, Vahide Mahdavi,

A combined gas chromatography–mass spectrometry (GC–MS) with headspace solid-phase microextraction (HS-SPME) method has been employed for the analysis of the flavor volatiles of some Iranian rice cultivars (Domsiah, Deylamani, Hashemi, Shirodi and Tarom). The samples were grown in different cities of Mazandaran province. The sampling procedure and chromatographic conditions were same for all sa...

2014
Mohammad Mahdi Moein Rana Said Fatma Bassyouni Mohamed Abdel-Rehim

In drug discovery and development, the quantification of drugs in biological samples is an important task for the determination of the physiological performance of the investigated drugs. After sampling, the next step in the analytical process is sample preparation. Because of the low concentration levels of drug in plasma and the variety of the metabolites, the selected extraction technique sh...

Journal: :Journal of the Brazilian Chemical Society 2021

Xylopia aromatica (Lam.) Mart. (Annonaceae) is a typical species from the Brazilian cerrado that presents medicinal properties. The plant distinguished by its large white flowers which produce pleasant fragrance. X. characterized wide range of application. These characteristics have motivated us to investigate volatile organic compounds (VOCs) via in vivo and vitro protocols headspace solid-pha...

Journal: :Journal of chromatographic science 2004
Carlo Bicchi Chiara Cordero Patrizia Rubiolo

This survey critically discusses high-concentration-capacity (HCC) headspace (HS) techniques applied to sample the volatile fraction of matrices of interest in the flavors and fragrance fields. In particular, the advantages, limits, and fields of application of HS solid-phase microextraction (SPME), high-capacity HS sorptive extraction (HSSE) and HS solid-phase dynamic extraction (SPDE) are eva...

Journal: :Lc Gc North America 2023

Needle-trap devices (NTDs) are another sorbent-based tool in the haystack of methods used analytical extractions. Syringe needles, similar to those for gas chromatography (GC) injection, can be partially filled with suitable sorbents and extracting collecting volatile organics, followed by injection into a GC instrument via thermal desorption. Although NTDs share many similarities advantages so...

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