نتایج جستجو برای: Dispersive Liquid- Liquid Microextraction (DLLME)

تعداد نتایج: 236076  

In this work, two approaches based on Dispersive Liquid-Liquid MicroExtraction (DLLME) and Dispersive Liquid-Liquid MicroExtraction based on Solidification of Floating Organic Drop (DLLME-SFO) were compared for the extraction and preconcentration of crocin from saffron and biological samples. Different DLLME and DLLME-SFO parameters influencing the extraction efficiency were studied and opt...

Journal: :iranian journal of pharmaceutical research 0
parvin parsaei department of chemistry, islamic azad university, north tehran branch, tehran, iran manouchehr bahmaei department of chemistry, islamic azad university, north tehran branch, tehran, iran. alireza ghannadi school of pharmacy and pharmaceutical sciences and isfahan pharmaceutical research center, isfahan university of medical sciences, isfahan, iran.

dispersive liquid-liquid microextraction method (dllme) combined with high-performance liquid chromatography-ultraviolet detection (hplc-uv) was used to determine thiamine (b1), nicotinamide (b3) and pyridoxine (b6) in sour cherry juice. this method was rapid, simple and sensitive. separation was accomplished using a c18 column. the optimum chromatographic conditions were found to be: mobile ph...

Journal: :iranian journal of pharmaceutical research 0
ramezan sadeghi toxicology and pharmacology dept., school of pharmacy, shahid beheshti university of medical sciences, tehran, i.r. iran. farzad kobarfard bmedicinal chemistry dept., school of pharmacy, shahid beheshti university of medical sciences, tehran, i.r. iran. phytochemistry research center, shahid beheshti university of medical sciences, tehran, , i.r. iran. hassan yazdanpanah toxicology and pharmacology dept., school of pharmacy, shahid beheshti university of medical sciences, tehran, i.r. iran. samira eslamizad toxicology and pharmacology dept., school of pharmacy, shahid beheshti university of medical sciences, tehran, i.r. iran. mitra bayat phytochemistry research center, shahid beheshti university of medical sciences, tehran, , i.r. iran.

dispersive liquid liquid microextraction (dllme) combined with gas chromatography–mass spectrometry (gc–ms) was used for the extraction and determination of 13 polycyclic aromatic hydrocarbons (pahs) in mineral water samples. in this procedure, the suitable combination of extraction solvent (500 µl chloroform) and disperser solvent (1000 µl acetone) were quickly injected into the water sample (...

Journal: :iranian journal of public health 0
s shegefti h sereshti s samadi

background: a new microextraction method named dispersive liquid-liquid microextraction (dllme) for determination of chloroform in pool water and blood of swimmers after swimming is described. methods: this method was performed based on coupling dispersive liquid-liquid microextraction (dllme) with gas chromatog­raphy-mass spectrometry (gc-ms). methanol and trichloroethylenes were used as the d...

Journal: :Talanta 2009
Aristidis N Anthemidis Kallirroy-Ioanna G Ioannou

This review aims to provide an overview of homogeneous liquid-liquid extraction (HLLE) and dispersive liquid-liquid microextraction (DLLME) methods and their potential use in inorganic analysis. Relevant applications to the determination of metal ions, metalloids and organometals are included. The phase separation mechanisms of these unconventional solvent extraction techniques are discussed. T...

Journal: :Journal of the American Society for Mass Spectrometry 2015
Sheng-Yu Lin Pin-Shiuan Chen Sarah Y Chang

A simple, rapid, and sensitive method for the detection of posaconazole using dispersive liquid-liquid microextraction (DLLME) coupled to surface-assisted laser desorption/ionization mass spectrometric detection (SALDI/MS) was developed. After the DLLME, posaconazole was detected using SALDI/MS with colloidal gold and α-cyano-4-hydroxycinnamic acid (CHCA) as the co-matrix. Under optimal extract...

Journal: :Talanta 2015
M A Aguirre E J Selva M Hidalgo A Canals

A rapid and efficient Dispersive Liquid-Liquid Microextraction (DLLME) followed by Laser-Induced Breakdown Spectroscopy detection (LIBS) was evaluated for simultaneous determination of Cr, Cu, Mn, Ni and Zn in water samples. Metals in the samples were extracted with tetrachloromethane as pyrrolidinedithiocarbamate (APDC) complexes, using vortex agitation to achieve dispersion of the extractant ...

Journal: :Journal of separation science 2012
Songqing Li Peng Gao Jiaheng Zhang Yubo Li Bing Peng Haixiang Gao Wenfeng Zhou

A novel dispersive liquid-liquid microextraction (DLLME) method followed by HPLC analysis, termed sequential DLLME, was developed for the preconcentration and determination of aryloxyphenoxy-propionate herbicides (i.e. haloxyfop-R-methyl, cyhalofop-butyl, fenoxaprop-P-ethyl, and fluazifop-P-butyl) in aqueous samples. The method is based on the combination of ultrasound-assisted DLLME with in si...

Journal: :Journal of chromatographic science 2011
Chun Wang Shujing Ji Qiuhua Wu Chunxia Wu Zhi Wang

A simple, rapid, efficient, and environmentally friendly method for the determination of five triazine herbicides in water and soil samples was developed by using dispersive liquid-liquid microextraction (DLLME), coupled with high performance liquid chromatography-diode array detection (HPLC-DAD). The water samples were directly used for DLLME extraction. For soil samples, the target analytes w...

2016

Recent increased demand for stingless bee honey in Malaysia have stimulated alternative methods to increase honey yields by using plastic cups as artificial honey pots within the beehives. However, honey’s acidity may lead to possible migration of plastic additives, where prolonged consumption may affect body’s physiological responses. This study was carried out to determine the presence of dib...

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