Results 141 to 150 of about 1,341 (180)

Application of DLLME to the Determination of Pyrethroids in Aqueous Samples

Chromatographia, 2010
A simple, rapid, sensitive, and environmentally friendly method has been established for the determination of four pyrethroids (fenpropathrin, cyhalothrin, permethrin and tau-fluvalinate) in water samples. The method uses dispersive liquid–liquid microextraction based on solidification of the floating organic droplets (DLLME-SFO) coupled to GC with ...
Lu Liu, Jing Cheng, Guzalnur Matsadiq, Hongbin Zhou, Junkai Li   +4 more
openaire   +1 more source

Lead Quantification in Urine Samples of Athletes by Coupling DLLME with UV-Vis Spectrophotometry

Biological Trace Element Research, 2016
Urine lead level is one of the most employed measures of lead exposure and risk. The urine samples used in this study were obtained from ten healthy male cyclists. Dispersive liquid-liquid microextraction combined with ultraviolet and visible spectrophotometry was utilized for preconcentration, extraction, and determination of lead in urine samples ...
Hakim Faraji, Masoumeh Helalizadeh
openaire   +2 more sources

Effective and sensitive determination of eleven disinfection byproducts in drinking water by DLLME and GC–MS

Science of The Total Environment, 2018
The aim of this study was to optimize the dispersive liquid-liquid microextraction (DLLME) parameters for simultaneous analysis through DLLME-gas chromatography-mass spectrometry (GC-MS) of six iodo-trihalomethanes, four haloacetonitriles, and one halonitromethane, which are residual disinfection products found in drinking water. Eleven disinfection by-
Jiwon, On, Heesoo, Pyo, Seung-Woon, Myung   +2 more
openaire   +2 more sources

Analysis of Organophosphorus Pesticides (OPPs) in Paddy Field Water Using IL-DLLME

2020
The application of organophosphorus pesticides (OPPs) is extensively used to combat the pest attack and massively used including in paddy field. The OPP is an effective pesticide with broad killing spectrum that exhibits less environmental persistence, but the residue is highly toxic to us.
Sharizal Bin Hasan, Non Daina Masdar, Mohd Lias Kamal, Norizan Binti Ramli, Nurul Zawani Alias   +4 more
openaire   +1 more source

Simultaneous determination of six fluoroquinolones in milk by validated QuEChERS-DLLME HPLC-FLD

Anal. Methods, 2014
We developed a novel, simple, fast and environmentally friendly extraction method (QuEChERS-DLLME) for the determination of fluoroquinolones in milk samples.
Rouhollah Karami-Osboo, Mohammad Hossein Shojaee, Ramin Miri, Farzad Kobarfard, Katayoun Javidnia   +4 more
openaire   +1 more source

Validated DLLME-LC-MS/MS for rapid determination of aflatoxins in commercial seasoning powders

Food Chemistry
Seasoning powders are widely used to enhance food flavour but can be contaminated with aflatoxins, toxic compounds that pose health risks. This study developed and validated a rapid, sensitive method for detecting AFB1, AFB2, AFG1 and AFG2 in seasoning powders.
Sofiyatul Akmal, Salim, Mohd Nazri, Ismail   +1 more
openaire   +2 more sources

Occurrence of cocaine and metabolites in hospital effluent - A risk evaluation and development of a HPLC method using DLLME

Chemosphere, 2017
A fast method for the determination of cocaine and its metabolites in hospital effluent samples was worked out by using liquid chromatography with the aid of fluorescence and diode array detection. Solid phase extraction and dispersive liquid -liquid microextraction were employed during the sample preparation stage.
Ayrton F. Martins, Jeremias B. dos Santos, Bruno H. Todeschini, Loisleini F. Saldanha, Daiane S. da Silva, Jaqueline F. Reichert, Darliana M. Souza   +6 more
openaire   +2 more sources

Non-targeted screening and analysis of volatile organic compounds in drinking water by DLLME with GC–MS

Science of The Total Environment, 2019
Volatile organic compounds (VOCs) in drinking water may potentially be hazardous. We developed a novel non-targeted analysis method of VOCs in drinking water that uses dispersive liquid-liquid microextraction coupled with gas chromatography-mass spectrometry. Analysis parameters were selected from range-finding tests on the peak number and average area
Xiaoqiu, Yang, Chang, Wang, Huancong, Shao, Qi, Zheng   +3 more
openaire   +2 more sources

Modern approaches in dispersive liquid-liquid microextraction (DLLME) based on ionic liquids: A review

Journal of Molecular Liquids, 2018
Abstract Dispersive liquid-liquid microextraction (DLLME) has become a very popular environmentally benign sample-preparation technique, due to its simplicity, speed of operation and low consumption of solvent and reagent. It has attracted much interest from scientists working in separation science, and much improvement has been made since its ...
I. Rykowska, J. Ziemblińska, I. Nowak
openaire   +1 more source

Extraction and Derivatization of Chlorophenoxy Acid Pesticides: Performing Two DLLME with One Extracting Phase

Chromatographia, 2016
A novel, simple and convenient method based on dispersive liquid–liquid microextraction (DLLME) and derivatization was developed and applied for isolation of a couple of selected chlorophenoxy acid herbicides from aquatic media. In the first step, analytes were extracted from acidic media into carbon tetrachloride phase using a DLLME.
Robab Ebrahimi, Alireza Feizbakhsh, Ali Es’haghi   +2 more
openaire   +1 more source