Results 71 to 80 of about 1,341 (180)

Determination of OCPs and PCBs in environmental water samples by GC-DLLME optimized by Response Surface Methodology

Mongolian Journal of Chemistry, 2019
A new sample preparation procedure to determine seven organochlorine pesticides and seven polychlorinated biphenyls in environmental water samples by using a combination of ultrasonic-assisted solvent extraction and dispersive liquid-liquid micro-extraction was established, and the extracted analytes were analyzed by gas chromatography coupled with ...
Badgaa Amarsanaa, Jiang He, Fujin Zhang, Otgonbayar Khureldavaa, Dekun Hou   +4 more
openaire   +3 more sources

A miniaturized QuEChERS-DLLME method for simultaneous determination of acetamide, acrylamide, and glycidamide in infant formula using GC–MS

Advances in Sample Preparation
Infant formula is the only food product suitable for infants during the first months of life. Therefore, evaluating food contaminants is essential for ensuring infant food safety.
J.A. Custodio-Mendoza, M.P. España Fariñas, A.M. Ares-Fuentes, M.A. Kurek, A.M. Carro Díaz   +4 more
doaj   +1 more source

Simultaneous QuEChERS and DLLME extraction of pesticides in tomato samples

, 2011
[abstract]
Melo, Armindo, Pinho, Olívia, Mansilha, Catarina, Isabel Ferreira   +3 more
openaire   +2 more sources

A Cyanoalkyl Silicone GC Stationary-Phase Polymer as an Extractant for Dispersive Liquid–Liquid Microextraction

Separations
In this work, three cyanoalkyl silicone GC stationary-phase polymers, namely OV-105, OV-225, and OV-275, were investigated as potential extractants for dispersive liquid–liquid microextraction (DLLME).
Mohamed A. Abdelaziz, Neil D. Danielson
doaj   +1 more source

Extraction and Analysis of Methadone in Exhaled Breath Condensate Using a Validated LC-UV Method

Journal of Pharmacy & Pharmaceutical Sciences, 2015
Purpose. A combined microextraction and separation method is presented for the determination of methadone in exhaled breath condensate (EBC) which is a promising non-invasive biological component for monitoring drug concentrations. Methods. In this work,
Maryam Khoubnasabjafari, Khalil Ansarin, Vahid Jouyban-Gharamaleki, Vahid Panahi-Azar, Ali Shayanfar, Laya Mohammadzadeh, Abolghasem Jouyban   +6 more
doaj   +1 more source

In-syringe dispersive liquid-liquid microextraction with liquid chromatographic determination of synthetic pyrethroids in surface water

Journal of Analytical Science and Technology, 2012
An indigenously fabricated in laboratory glass syringe was used for in-syringe dispersive liquid-liquid microextraction (is-DLLME) and preconcentration of synthetic pyrethroids (SPs) from surface waters suitable for their determination by high ...
Saeed S. Albaseer, R. Nageswara Rao, Y. V. Swamy, K. Mukkanti   +3 more
doaj  

Determination of organochlorine pesticides from juice samples using magnetic biochar-based dispersive micro-solid phase extraction in combination with dispersive liquid-liquid microextraction

Emerging Contaminants
Analysis of pesticide residue levels in juice beverages is important to ensure safe consumption and avoid global trade concerns associated to pesticide contaminations.
Kero Assefa Ago, Shimeles Addisu Kitte, Abera Gure   +2 more
doaj   +1 more source

Measurement of Chloroform in Swimming Pools' Waters and Swimmers’ Blood [PDF]

Iranian Journal of Public Health, 2009
"nBackground: A new microextraction method named dispersive liquid-liquid microextraction (DLLME) for determination of chloroform in pool water and blood of swimmers after swimming is described."nMethods: This method was performed based on ...
S Shegefti, H Sereshti, S Samadi
doaj  

Monitoring of sirolimus in the whole blood samples from pediatric patients with lymphatic anomalies

Open Medicine, 2023
Treder Natalia, Plenis Alina, Maliszewska Olga, Kaczmarczyk Natalia, Olędzka Ilona, Kowalski Piotr, Bączek Tomasz, Bień Ewa, Krawczyk Małgorzata Anna, Roszkowska Anna   +9 more
doaj   +1 more source

Dispersive Liquid–Liquid Micro Extraction: An Analytical Technique Undergoing Continuous Evolution and Development—A Review of the Last 5 Years

Separations
Over the years, monitoring the quality of the environment, food, and human health has emerged as a fundamental objective of scientific investigation. Various analytical techniques have been devised and continually refined to ensure a high standard of ...
Ivan Notardonato, Pasquale Avino
doaj   +1 more source