نتایج جستجو برای: hollow fiber solidliquid phase microextraction

تعداد نتایج: 734692  

Journal: :iranian journal of public health 0
a ameri m gholami n nasseri t matsuura

membrane technology is used to separate water or solvents from salts or pollutants. this technique could be used for water treatment. for using of polyether sulfone (pes) hollow fiber membranes in water treatment processes, the pes hollow fiber membranes were prepared by dry-wet spinning method and heated in an oven at: 120°c, 150°c and 180°c. the effect of heating on performance of membranes w...

Journal: :Optics express 2007
Li Zheng Xianfeng Chen Songsong Tang Ruxin Li

A technique for enhanced generation of selected high harmonics in a gas medium, in a high ionization limit, is proposed in this paper. An aperiodically corrugated hollow-core fiber is employed to modulate the intensity of the fundamental laser pulse along the direction of propagation, resulting in multiple quasi-phase-matched high harmonic emissions at the cutoff region. Simulated annealing (SA...

Journal: Nanochemistry Research 2018
Marzieh Babashpour Asl Marzieh Piryaei Mir Mahdi Abolghasemi Zohreh Hosseinzadeh

The objective of this study is determination the volatile compounds of Matricaria chamomilla of an inorganic–organic hybrid material based on ZnO nanoparticles anchored to a composite made from polythiophene and hexagonally ordered silica (ZnO/PT/SBA-15) as a solid-phase fiber microextraction (SPME). Microextraction techniques with nanoparticles ZnO/PT/SBA-15 resulted in a more efficient analyt...

Journal: :Optics express 2014
He Huang Shijie Chen Hongmei Zou Qing Li Jian Fu Feng Lin X Wu

A novel direct-laser writing fabrication process for micro-axicons is demonstrated. A fiber-axicon-generated Bessel beam was utilized to write on UV-curable optical epoxy to form new axicons and axicon arrays, and geometrical parameters of the replicated epoxy axicons were analyzed in terms of both apex angle and proximity of the writing axicons. The shape of the fabricated axicons was demonstr...

2016
Kailin Liu Shiji Xu Minghuan Zhang Yahong Kou Xiaomao Zhou Kun Luo Lifeng Hu Xiangying Liu Min Liu Lianyang Bai

The toxicity of ionizable organic compounds to organisms depends on the pH, which therefore affects risk assessments of these compounds. However, there is not a direct chemical method to predict the toxicity of ionizable organic compounds. To determine whether hollow-fiber liquid-phase microextraction (HF-LPME) is applicable for this purpose, a three-phase HF-LPME was used to measure sulfadiazi...

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