Results 11 to 20 of about 1,468,518 (161)

Liquid-phase microextraction of polycyclic aromatic hydrocarbons: A review

open access: yesReviews in Analytical Chemistry, 2020
Polycyclic aromatic hydrocarbons (PAHs) are a large group of organic compounds comprised of two or more fused benzene rings, which arise from the incomplete combustion of organic materials. These compounds have been of concern as carcinogens and mutagens
Jalili Vahid   +2 more
doaj   +2 more sources

The 1979 Letter Perfect

open access: yes, 1979
Periodical issued by the Liquid Paper Corporation with news and updates from various departments and other information of interest to ...
Hart, Joy, Liquid Paper Corporation
core   +9 more sources

One-step ionic liquid-based ultrasound-assisted dispersive liquid–liquid microextraction coupled with high-performance liquid chromatography for the determination of pyrethroids in traditional Chinese medicine oral liquid preparations

open access: yesBMC Chemistry, 2019
In this study, a simple one-step ionic liquid-based ultrasound-assisted dispersive liquid–liquid microextraction technique was coupled with high-performance liquid chromatography for the analysis of four pyrethroids in three kinds of traditional Chinese ...
Yiyi Liao   +8 more
doaj   +1 more source

Application of dispersive liquid–liquid microextraction and high-performance liquid chromatography for the determination of cetrimonium bromide in water samples [PDF]

open access: yesشیمی کاربردی روز, 2013
A simple, rapid and sensitive method for the determination of cetrimonium bromide at trace levels in water samples was developed by combining a dispersive liquid –liquid microextraction (DLLME) technique with high performance liquid ...
Maryam Rajabi, Mehri Ghazaghi
doaj   +1 more source

Modern Approaches to Preparation of Body Fluids for Determination of Bioactive Compounds

open access: yesSeparations, 2019
The current clinical and forensic toxicological analysis of body fluids requires a modern approach to sample preparation characterized by high selectivity and enrichment capability, suitability for micro-samples, simplicity and speed, and the possibility
Katarzyna Madej, Wojciech Piekoszewski
doaj   +1 more source

Speciation analysis of mercury in water samples by dispersive liquid-liquid microextraction coupled to capillary electrophoresis [PDF]

open access: yes, 2014
In this study, a method of pretreatment and speciation analysis of mercury by dispersive liquid-liquid microextraction along with CE was developed. The method was based on the fact that mercury species including methylmercury (MeHg), ethylmercury (EtHg),
Yingying Wen   +17 more
core   +1 more source

Dispersive liquid-liquid microextraction for four phenolic environmental estrogens in water samples followed by determination using capillary electrophoresis [PDF]

open access: yes, 2016
Dispersive liquid-liquid microextraction (DLLME) coupled with CE was successfully developed for simultaneous determination of four types of phenolic environmental estrogens (PEEs), namely hexestrol (HS), bisphenol A (BPA), diethylstilbestrol (DES) and ...
Wu, Xiaqing   +6 more
core   +1 more source

Determination of bisphenol a migration from food packaging by dispersive liquid-liquid microextraction

open access: yesMethodsX, 2021
In the current work, a rapid and simple dispersive liquid-liquid microextraction method (DLLME) was used to determine Bisphenol A (BPA). High performance liquid chromatography with the photodiode-array detector (HPLC-DAD) coupled DLLME method was ...
Mostafa Mahdavianpour   +6 more
doaj   +1 more source

Principais técnicas de preparo de amostra para a determinação de resíduos de agrotóxicos em água por cromatografia líquida com detecção por arranjo de diodos e por espectrometria de massas

open access: yesQuímica Nova, 2011
The determination of pesticide residues in water samples by Liquid Chromatography require sample preparation for extraction and enrichment of the analytes with the minimization of interferences to achieve adequate detection limits.
Sergiane Souza Caldas   +5 more
doaj   +1 more source

The 1980 Letter Perfect

open access: yes, 1980
Periodical issued by the Liquid Paper Corporation with news and updates from various departments and other information of interest to ...
Liquid Paper Corporation
core   +5 more sources

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