نتایج جستجو برای: magnetic solid phase extraction

تعداد نتایج: 1205402  

In this research, the magnetite polystyrene maleic anhydride (MPSMA) was synthesized and structure and morphology characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy techniques. The obtained nano-structured inorganic material was employed as a novel magnetic nanosorbent for separation and pre-concentration of Methyl violet (10B) dye from aqu...

Journal: :journal of chemical health risks 0
aldo pacheco ferreira

the occurrence and fate of trace-level contamination of pharmaceuticals in the aquatic environment has been recognized as one of the emerging issues in environmental chemistry. the effluents of wastewater treatment plants, usually directly emitted to the environment, often contain the anti-inflammatory drug diclofenac. diclofenac was chosen because it is of high consumption; by background liter...

Journal: :Chemical communications 2013
Tao Zeng Xiaole Zhang Yurong Ma Saihua Wang Hongyun Niu Yaqi Cai

A novel rattle-type sorbent with a surface-modified interior cavity and a magnetic Fe3O4-C double-layered shell was synthesized and first applied for magnetic solid-phase extraction.

A simple, highly sensitive, accurate and selective method for determination of trace amounts of Ni2+ in water samples. In this paper, Dioctylphthalate (DOP) was used to encapsulate nano-Fe3O4 and produce a nano-Fe3O4-DOP sorbent based new sorbent was prepared. This was treated with ethylenediamine (ED) in another solvent-free procedure for the formation of a novel nano-Fe3O4-DOP-ED. Flame atomi...

A new analytical approach was developed involving magnetic solid–phase extraction and spectrofluorimetric determination of carvedilol in human plasma samples. A plasma sample was prepared and adjusted to pH 8.2–10, then carvedilol was quickly extracted using iron oxide magnetic nanoparticles modified by the surfactant cetyltrimethylammonium bromide and determined to apply spectrofluorimetry...

پایان نامه :دانشگاه الزهراء علیها السلام 1393

سیکلوتیدها خانواده بزرگی از پپتیدهای گیاهی هستند که در خانواده های گیاهی violaceae، rubiaceae ، cucurbitaceae و fabaceae بیان می شوند. ساختار این پپتیدهای کوچک به طور متوسط از 30 اسیدآمینه تشکیل شده و شامل موتیف گره سیستینی حلقوی (cck) می باشد. باور بر اینست که سیکلوتیدها به واسطه اثرات حشره کشی، نقش مهمی در سیستم دفاعی گیاهان ایفا می کنند. سیکلوتیدها به دلیل فعالیت های زیستی متعدد از جمله ضد و...

Journal: :The Analyst 2012
Yiming Long Yingzhuang Chen Fei Yang Chunyan Chen Di Pan Qingyun Cai Shouzhuo Yao

Triphenylamine (TPA)-functionalized magnetic microspheres (Fe(3)O(4)/SiO(2)/TPA) were prepared and applied as solid phase extraction (SPE) adsorbents for the analysis of polycyclic aromatic hydrocarbons (PAHs) in environmental samples in combination with high-performance liquid chromatography (HPLC). The magnetic solid-phase extraction (MSPE) conditions affecting the extraction efficiency were ...

The purpose of this study was to separate and determine Nystatin in water, urine and plasma samples using a method based on sodium dodecyl sulfate (SDS) coated magnetic nanoparticles (nano-magnets Fe3O4) along with spectrophotometry which has been developed for to this end. Due to their excellent adsorption capacity and high chemical stability, nanoparticles can be modified by surfactants. The ...

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