نتایج جستجو برای: micro-solid phase extraction

تعداد نتایج: 1006708  

Journal: :international journal of occupational hygiene 0
nematullah kurd department of occupational health engineering, hamedan university of medical sciences, hamadan, iran. abdulrahman bahrami research centre for health sciences, faculty of health, hamedan university of medical sciences, hamadan, iran. farshid ghorbani-shahna research centre for health sciences, faculty of health, hamedan university of medical sciences, hamadan, iran. mahmoud heidari department of occupational health, faculty of health, guilan university of medical sciences, rasht, iran.

acetonitrile used as a solvent in manufactures and affects to central nervous system from inhalation exposure. the aim of this study was to develop a micro-solid phase extraction method for  the determination of acetonitrile in the air matrix. the sampling was performed with a small diameter fused silica fiber coated with a thin film of stationary phase and was subsequently desorbed and analyze...

Journal: :journal of herbal drugs 0
majid mohammadhosseini department of chemistry, shahrood branch, islamic azad university, shahrood, iran

background & aim:nepeta racemosa is an herbal and medicinal plant and this report aims to   identify chemical compositions of the essential oils and volatiles of its   aerial parts through classical and advanced methods.  experimental: chemical profiles of the essential oils and volatile compounds from the aerial parts of nepeta racemosa obtained through hydrodistillation (hd), solvent-free mic...

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: :Nippon Shokuhin Kagaku Kogaku Kaishi 2018

Journal: :international journal of environmental research 0
h. sid kalal nuclear fuel cycle school, nuclear science and technology research institute, aeoi, p.o.box 11365-3486, tehran, iran h. hoveidi graduate faculty of environment, university of tehran, p.o. box 14155-6135, tehran, iran m. thagiof nuclear fuel cycle school, nuclear science and technology research institute, aeoi, p.o.box 11365-3486, tehran, iran n. pakizevand nuclear fuel cycle school, nuclear science and technology research institute, aeoi, p.o.box 11365-3486, tehran, iran m.r. almasian nuclear fuel cycle school, nuclear science and technology research institute, aeoi, p.o.box 11365-3486, tehran, iran m.a. firoozzare nuclear fuel cycle school, nuclear science and technology research institute, aeoi, p.o.box 11365-3486, tehran, iran

a chelating resin is prepared by condensation polymerization of aniline with formaldehyde andcharacterized by ft-ir, elemental analysis and studied for the preconcentration and determination of traceplatinum ion from environmental water sample using inductively coupled plasma-atomic emission spectroscopy(icp-aes). the optimum ph value for sorption of the metal ions was 5. the maximum adsorption...

Journal: :international journal of environmental research 0

styrene is an important constituent of widely used organic solvents in industries for production of various synthetic materials. the use of solid-phase extraction (spe) has grown and is a fertile technique of sample preparation as it provides better results than those produced by liquidliquid extraction. in this study, spe has been optimized, regarding sample ph, sample concentration, sample fl...

Journal: :iranian journal of analytical chemistry 2014
sandeep jaggi usha gupta

a simple and sensitive method has been developed for the preconcentration and determination of trace level of co(ii) using uv-vis spectrophotometry. β-cyclodextrin polymer modified with 1-(2-pyridylazo)-2-naphthol (pan) is used for the preconcentration of co(ii) from samples at ph 8.5. the polymer is synthesized and characterized using elemental analysis, ft-ir and sem analysis. the factors aff...

2016
Jie Peng Fang Tang Rui Zhou Xiang Xie Sanwang Li Feifan Xie Peng Yu Lingli Mu

Biological sample pretreatment is an important step in biological sample analysis. Due to the diversity of biological matrices, the analysis of target substances in these samples presents significant challenges to sample processing. To meet these emerging demands on biopharmaceutical analysis, this paper summarizes several new techniques of on-line biological sample processing: solid phase extr...

Journal: :international journal of environmental research 2012
h. sid kalal h. hoveidi m. thagiof n. pakizevand m.r. almasian

a chelating resin is prepared by condensation polymerization of aniline with formaldehyde andcharacterized by ft-ir, elemental analysis and studied for the preconcentration and determination of traceplatinum ion from environmental water sample using inductively coupled plasma-atomic emission spectroscopy(icp-aes). the optimum ph value for sorption of the metal ions was 5. the maximum adsorption...

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...

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