نتایج جستجو برای: hollow fiber solid liquid phase microextraction

تعداد نتایج: 1045469  

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2009
Rie Ito Migaku Kawaguchi Youji Koganei Hidehiro Honda Noriya Okanouchi Norihiro Sakui Koichi Saito Hiroyuki Nakazawa

A simple and highly sensitive method that involves miniaturized hollow fiber assisted liquid-phase microextraction (HF-LPME) with in situ acyl derivatization and GC-MS was developed for the determination of benzophenone (BP) and related compounds in human urine samples. The limits of detection (S/N = 3) and quantification (S/N > 10) of BPs in human urine samples are 0.01 to 0.05 and 0.05 to 0.2...

Journal: :Food chemistry 2013
Jia Li Qiong Su Ke-Yao Li Chu-Feng Sun Wen-Bo Zhang

A novel procedure based on multi-walled carbon nanotubes (MWCNTs)/silica reinforced hollow fibre solid-phase microextraction combined with gas chromatography-mass spectrometry has been developed to analyse trace phthalate acid esters in beverage and alcoholic samples. Because of their excellent adsorption capability towards hydrophobic compounds, functionalized MWCNTs, acting as solid-phase sor...

Journal: :Analytica chimica acta 2015
Tong Zhao Xiujuan Guan Wanjin Tang Ying Ma Haixia Zhang

A kind of new temperature sensitive molecularly imprinted polymer (MIP) with ofloxacin (OFL) as template was prepared for the coating of solid phase microextraction (SPME). Dopamine was self-polymerized on stainless steel fiber (SSF) as the SPME support followed by silanization. Then MIP was synthesized as SPME coating on the modified SSF in a capillary, with N-isopropyl acrylamide as temperatu...

Journal: :مجله دانشگاه علوم پزشکی قم 0
حمیدرضا حیدری hr heidari qom university of medical sciencesدانشگاه علوم پزشکی قم سید جمال الدین شاه طاهری sj shahtaheri tehran university of medical sciencesدانشگاه علوم پزشکی تهران محمود علیمحمدی m alimohammadi tehran university of medical sciencesدانشگاه علوم پزشکی تهران عباس رحیمی فروشانی a rahimi-froshani tehran university of medical sciencesدانشگاه علوم پزشکی تهران فریده گلبابایی f golbabaei tehran university of medical sciencesدانشگاه علوم پزشکی تهران

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...

Journal: :iranian journal of public health 0
hr heidari dept. of occupational health sj shahtaheri dept. of occupational health, center for environmental research m alimohammadi dept .of environmental health a rahimi-froshani dept. of epidemiology and biostatistics, school of public health, tehran university of medical scien

background: determination of organic pollutants usually requires extraction of the pollutants from samples, using hazard­ous solvent. solid phase micro-extraction (spme) is a solvent-free equilibrium extraction method, in which, proper calibra­tion can allow quantitative measurements of organic pollutants at a very good sensitivity without the use of any organic sol­vent. because individual voc...

2011
Pawel Olszowy Malgorzata Szultka Boguslaw Buszewski

A novel sorbent in solid phase microextraction (SPME) method based on poly(3-alkylthiophenes) was used in the isolation of linezolid from human plasma samples following liquid chromatography determination. The effect of extraction time on the sorption capacity of the SPME process was studied and pointed at 10 min both for adsorption and desorption. Poly(3-methylthiophene) and poly(3-nonylthioph...

Journal: :international journal of environmental research 2011
r. mahmoudkhani a.h. hassani a. torabian s.m. borghei

one of the most important concerns in tehran municipal landfill is the production of leachate and its potential for water resources pollution, this study was undertaken to examine feasibility of biological and physico/chemical treating of high-strength landfill leachate that was collected from tehran municipal landfill. average cod of the leachate in aerobic submerged membrane bioreactor is 68...

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