نتایج جستجو برای: phase extraction

تعداد نتایج: 750564  

Journal: :analytical and bioanalytical chemistry research 0
faezeh khalilian department of chemistry, college of basic science, yadegar -e- imam khomeini (rah) shahre rey branch, islamic azad university, tehran, iran mohammad farajvand department of chemistry, college of basic science, yadegar-e-imam khomeini (rah) shahre rey branch, islamic azad university, tehran, iran

a solid phase extraction sorbent based on polyaniline/graphene nanocomposite is presented. the structure and morphology of synthesized nanocomposite were investigated by fourier transform infrared spectroscopy, field emission scanning electron microscopy, x-ray diffraction and thermal gravimetric analysis. the dispersive solid phase extraction was employed to the isolation and preconcentration ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1391

in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...

Journal: :journal of physical & theoretical chemistry 2015
farveh raoufi saidah bagheri ebrahim niknam khodabakhsh niknam hamid reza farmani

a sensitive and selective solid phase extraction procedure for the determination of traces of cd(ii),zn(ii) and ag(i) ions has been developed. an alumina-sodium dodecyl sulfate (sds) coated on with2,3 di hydro 2,3 para tolyl qinazoline (1 h)- 4 one (dptqo). the influences of the analyticalparameters including ph and sample volume were investigated. common coexisting ions did notinterfere on the...

Journal: :journal of chemical health risks 0
saeedeh ansari department of chemistry, islamic azad university, saveh branch, saveh, iran azam ghorbani department of chemistry, islamic azad university, saveh branch, saveh, iran

in this study, for the analysis of human urine samples, a novel method explained for the determination of celecoxib, a nonsteroidal anti-inflammatory drug (nsaid), using molecularly imprinted solid-phase extraction (mispe) coupled with high-performance liquid chromatography (hplc). the synthesis of the mip was performed by precipitation polymerization in methacrylic acid (maa), ethylene glycol ...

Journal: :journal of chemical health risks 0
m. khoeini sharifabadi m. saber tehrani a. mehdinia p. abroomand azar s. waqif husain

a simple and sensitive, solid-phase extraction method for the removal of citalopram drug from waste water has been developed by using magnetic nanoparticles modified with surfactant sodium dodecyl sulfate. these magnetic nanoparticles have shown great adsorptive tendency towards citalopram drug. the effect of different parameters influencing the extraction efficiency of this drug were investiga...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
fatemeh saadat gharehbagh sayed mohammad ali mousavian,

an experimental study has been conducted on the hydrodynamics of a stage mixer-settler to obtain an appropriate design. in this paper several tests was performed to investigate full factorial design of experiments. since each test was repeated seven times, the repeatability of the test was confirmed (p=1 bar and t=25 °c). sauter diameter was determined by photographing both the mixer and settle...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2008
mohammad hosein habibi mohammad reza hadjmohammadi

a solid-phase extraction (spe) method for sample clean-up and preconcentration followed by reversed-phase high-performance liquid chromatography (rp-hplc) with uv detection is reported for determination of polycyclic aromatic hydrocarbons (pahs) in the caspian seawater. a good resolution was obtained using acetonitrile:water (40:60) as mobile-phase for separation of these compounds. the effect ...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2014
mahmood payehghadr homa shafiekhani ali reza sabouri abdoll mohammad attaran mohammad kazem rofouei

a facile and highly efficient method have been developed for the preconcentration of the mercury content in crude oil and gasoline samples after digestion with microwave-assisted digestion. octadecyl silica membrane disk has been modified by the recently synthesized triazene ligand, (e)-1-(2-ethoxyphenyl)-3-(4-nitrophenyl) triaz-1-ene (ent), then the modified membrane was used for the preconcen...

Extraction of nickel and its co-extraction with copper from ammoniacal media into emulsion liquid membrane systems (ELMs) was investigated using LIX 84I as the carrier. Measurement of the solute stripped in the internal phase of emulsion opened a new dimension in the study of the ELM extraction processes. The effect of operating parameters such as feed pH, initial feed concentration, and treat ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید