نتایج جستجو برای: liquid phase microextraction

تعداد نتایج: 776251  

Journal: :Critical reviews in food science and nutrition 2014
Ioannis S Arvanitoyannis Niki Dionisopoulou

This review aims at summarizing the most recent updates in the field of acrylamide (AA) formation (mechanism, conditions) and the determination of AA in a number of foods (fried or baked potatoes, chips, coffee, bread, etc). The methods applied for AA detection [Capillary Electrophoresis-Mass Spectrometry (CE-MS), Liquid Chromatography-Mass Spectrometry (LC-MS), Non-Aqueous Capillary Electropho...

2014
ALIREZA ASGHARI MEHRI GHAZAGHI MARYAM RAJABI MAHDI BEHZAD MEHRORANG GHAEDI

Ionic liquid-based dispersive liquid–liquid microextraction (IL– –DLLME) coupled with high performance liquid chromatography (HPLC) with UV detection was developed for the simultaneous extraction and determination of nickel, cobalt, copper and zinc ions. In the proposed approach, salophen (N,N'-bis(salicylidene)-1,2-phenylenediamine) was used as a chelating agent, the ionic liquid, 1-hexyl-3-me...

Journal: :Radiation protection dosimetry 2012
Baki B Sadi Chunsheng Li Gary H Kramer

A new radioanalytical method was developed for rapid determination of (226)Ra in human urine samples. The method is based on organic removal and decolourisation of a urine sample by a polymeric (acrylic ester) solid phase sorbent material followed by extraction and preconcentration of (226)Ra in an organic solvent using a dispersive liquid-liquid microextraction technique. Radiometric measureme...

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. hassan yazdanpanah vali-e-asr ave. farzad kobarfard . bphytochemistry research center, shahid beheshti university of medical sciences, tehran, i.r. iran. cdepartment of medicinal chemistry, school of pharmacy, shahid beheshti university of medical sciences, tehran, i.r. iran. samira eslamizad atoxicology and pharmacology dept., school of pharmacy, shahid beheshti university of medical sciences, tehran, i.r. iran. mitra bayat . bphytochemistry research center, shahid beheshti university of medical sciences, tehran, i.r. iran.

abstract polycyclic aromatic hydrocarbons (pahs) are classified as persistent and carcinogenic organic pollutants. pahs contamination has been reported in water. many of relevant regulatory bodies such as eu and epa have regulated the limit levels for pahs in drinking water. in this study, 13 priority polycyclic aromatic hydrocarbons (pahs) were determined in tap water samples of tehran and wat...

AbstractThe oldest method for the managing of the illness is the use of medicinal plants. The use of herbal products as the first choice in self-treatment of minor conditions continues to expand rapidly across Iran. This makes the safety of herbal products an important public health issue.Pesticides are used widely in agriculture to increase the production by controlling the harmful insects and...

2012
M.T. Hamed Mosavian Z. Es'haghi N. Razavi S. Banihashemi

This paper describes a new approach for the determination of amitriptyline in wastewater by ionic liquid based immersed droplet microextraction (IL-IDME) prior to high-performance liquid chromatography with ultraviolet detection. 1-Hexyl-3-methylimidazolium hexafluorophosphate ([C6MIM][PF6]) was used as an ionic liquid. Various factors that affect extraction, such as volume of ionic liquid, sti...

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه شیمی و مهندسی شیمی ایران - پژوهشکده شیمی تجزیه و معدنی 1390

hydrochlorothiazide (hct) is a diuretic agent which is shown to be effective in the treatment of hypertension. literature reports have demonstrated that urinary excretion data may be used to assess the bioavailability of various formulations containing this thiazide. also hct consumption by the athletes is one of the drugs which should be regulated by world anti-doping agency (wada), because of...

Journal: :analytical and bioanalytical chemistry research 0
mir ali farajzadeh department of analytical chemistry, faculty of chemistry, university of tabriz, tabriz, iran maryam abbaspoura abbaspour department of analytical chemistry, faculty of chemistry, university of tabriz, tabriz, iran mohammad reza afshar mogaddama afshar mogaddam department of analytical chemistry, faculty of chemistry, university of tabriz, tabriz, iran ali akbar alizadeh nabil alizadeh nabil food and drug laboratories, tabriz university of medical sciences, tabriz, iran

an air–assisted liquid–liquid microextraction method for the extraction and preconcentration of trace amounts of some synthetic phenolic antioxidants in biological fluids followed by their determination by gas chromatography–flame ionization detection has been reported. in this method the target analytes are extracted into a few microliters of carbon tetrachloride (extraction solvent) from an a...

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 (...

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