Results 191 to 200 of about 4,299 (226)

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

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

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

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

DLLME Combined with GC–MS for the Determination of Methylparaben, Ethylparaben, Propylparaben and Butylparaben in Beverage Samples

Chromatographia, 2010
Dispersive liquid–liquid microextraction (DLLME) combined with gas chromatography-mass spectrometry (GC–MS) has been developed for the determination of four parabens (methylparaben, ethylparaben, propylparaben and butylparaben) in beverage samples. Some important parameters, such as the kinds and volumes of extraction solvent and dispersive solvent ...
Yi Han, Xiaoyu Jia, Xinli Liu, Taicheng Duan, Hangting Chen   +4 more
openaire   +1 more source

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

Analysis of PAHs in Water and Fruit Juice Samples by DLLME Combined with LC-Fluorescence Detection

Chromatographia, 2009
A simple, rapid and efficient method termed dispersive liquid–liquid microextraction combined with liquid chromatography-fluorescence detection, has been developed for the extraction and determination of polycyclic aromatic hydrocarbons (PAHs) in water and fruit juice samples.
Xinna Zhao, Lingyan Fu, Jia Hu, Jianwang Li, Huili Wang, Changjiang Huang, Xuedong Wang   +6 more
openaire   +1 more source

[Simultaneous determination of 6 neonicotinoid residues in soil using DLLME-HPLC and UV].

Guang pu xue yu guang pu fen xi = Guang pu, 2015
A simple, cheap and rugged method was developed for simultaneous deter mination of 6 neonicotinoid residues in soil, including imidacloprid, acetamiprid, thiamethoxam, thiacloprid, clothianidin and nitenpyram. The soil sample was produced by dispersive liquid-liquid micro-extraction (DLLME) after extracted by the mixed solution of acetonitrile and ...
Bao-li, Sun, Hong, Shan, Yan-hua, Li, Ya-ling, Zeng, Xiu-li, Shen, Cheng-feng, Tong   +5 more
openaire   +1 more source

Evaluation of Wet Digestion and QuEChERS-DLLME for Heavy Metal Determination in Aqueous Solutions

9th International Students Science Congress Proceedings Book
The QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) method, when coupled with Dispersive Liquid-Liquid Microextraction (DLLME), represents an innovative and efficient approach in analytical chemistry for the extraction and determination of contaminants in complex matrices, including environmental and aqueous samples. This study evaluates the
Aminu Akilu, Ismail Muhammad, Abubakar Lawal   +2 more
openaire   +1 more source