Results 11 to 20 of about 2,072 (135)

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

BMC 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, Yuge Hou, Yan Zhong, Hong Chen, Chang Xu, Makoto Tsunoda, Yingxia Zhang, Shiming Deng, Yanting Song   +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]

شیمی 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

Separations, 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

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

Química 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, Fábio Ferreira Gonçalves, Ednei Gilberto Primel, Osmar Damian Prestes, Manoel Leonardo Martins, Renato Zanella   +5 more
doaj   +1 more source

Determination of Trace Amounts of Lead with ETAAS After Single Drop Microextraction and Dispersive Liquid Liquid Microextraction Methods

E3S Web of Conferences, 2013
Two liquid-phase microextraction procedures, single-drop microextraction (SDME) and dispersive liquid–liquid microextraction (DLLME), have been developed for the determination of lead by electrothermal atomic absorption spectrometry (ETAAS). Both methods
Efeçınar M., Çakır P., Şatıroğlu N.   +2 more
doaj   +1 more source

Determination of Mercury(II) on A Centrifugal Microfluidic Device Using Ionic Liquid Dispersive Liquid−Liquid Microextraction

Micromachines, 2019
An integrated centrifugal microfluidic device was developed to preconcentrate and detect hazardous mercury (II) in water with ionic liquid as environmentally friendly extractant.
Yun Hui, Yujia Liu, William C. Tang, Dian Song, Marc Madou, Shanhong Xia, Tianzhun Wu   +6 more
doaj   +1 more source

Extraction and Determination of Crocin in Saffron Samples by Dispersive Liquid-Liquid Microextraction [PDF]

Zirā̒at va Fanāvarī-i Za̒farān, 2016
The main component responsible for color in saffron is crocin with the chemical formula of C44H64O24. Crocin is one of several carotenoids in nature that is soluble in water. This solubility is one of the reasons for its widespread usage as a colorant in
Somayeh Heydari, Maryam Khalili
doaj   +1 more source

Comparison of Two Liquid-Liquid Microextractions for the Detection of Crocin in the Saffron and Biological Samples Using UV- Vis Spectrophotometry [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2018
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 ...
Somayeh Heydari
doaj  

Combination of flame atomic absorption spectrometry with ligandless-dispersive liquid- liquid microextraction for preconcentration and determination of trace amount of lead in water samples

Bulletin of the Chemical Society of Ethiopia, 2013
A new ligandless-dispersive liquid–liquid microextraction method has been developed for the separation and flame atomic absorption spectrometry determination of trace amount of lead(II) ion.
Y.M. Baghelani, T. Shamspur, S.Z. Mohammadi   +2 more
doaj   +1 more source

Determination of Gold in Various Environment Samples by Flame Atomic Absorption Spectrometry Using Dispersive Liquid–Liquid Microextraction Sampling

Croatica Chemica Acta, 2015
A new dispersive liquid–liquid microextraction separation/preconcentration procedure as a rapid sample-preparation technique is proposed for detection of ultra trace amounts of Au(III) in various media by flame atomic absorption spectrometry using 1,5 ...
Şerife Saçmacı, Şenol Kartal, Gülçin Kalkan   +2 more
doaj   +1 more source