Results 11 to 20 of about 61,447 (248)

PANI/PTA/Fe<sub>3</sub>O<sub>4</sub> Nanocomposite Coated on Stainless-Steel Towards Efficient Solid-Phase Microextraction of Tetracycline From Human Urine Samples Prior to HPLC-DAD Analysis. [PDF]

open access: yesAnal Sci Adv
ABSTRACT Tetracycline (TC) is a commonly prescribed broad‐spectrum antibiotic, and its widespread use together with its persistence in biological matrices, particularly urine, has raised serious concerns related to clinical safety, public health and the emergence of antimicrobial resistance, underscoring the need for its accurate and sensitive ...
Orang SN, Amoli HS, Hasanzadeh M.
europepmc   +2 more sources

Covalent Organic Frameworks in Sample Preparation

open access: yesMolecules, 2020
Covalent organic frameworks (COFs) can be classified as emerging porous crystalline polymers with extremely high porosity and surface area size, and good thermal stability.
Javier González-Sálamo   +4 more
doaj   +1 more source

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

open access: yesZirā̒at 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

Current Development in Bioanalytical Sample Preparation Techniques

open access: yesBaghdad Journal of Biochemistry and Applied Biological Sciences, 2023
The preparation of the sample is the most important stage in bioanalysis. Proteins, salts, and other organic compounds with chemical characteristics similar to the target analytes are commonly found in biological samples.
SAKSHI SANGALE SAKSHI   +2 more
doaj   +1 more source

Chemical derivatization processes applied to amine determination in samples of different matrix composition [PDF]

open access: yes, 2015
No abstract ...
Biziuk, Marek   +3 more
core   +1 more source

Silver Nanoparticles Functionalized with Sodium Mercaptoethane Sulfonate to Remove Copper from Water by the Formation of a Micellar Phase

open access: yesSeparations, 2021
This work presents a novel procedure for the removal of Cu2+ from water, an essential element in human nutrition considered toxic in high concentrations, based on a microextraction technique involving the formation of a micellar phase.
Yesica Vicente-Martínez   +3 more
doaj   +1 more source

Solid-phase microextraction for bioconcentration studies according to OECD TG 305 [PDF]

open access: yes, 2012
An important aim of the European Community Regulation on chemicals and their safe use is the identification of (very) persistent, (very) bioaccumulative, and toxic substances.
Böhm, Leonard   +2 more
core   +2 more sources

An optimized analytical method for the simultaneous detection of iodoform, iodoacetic acid, and other trihalomethanes and haloacetic acids in drinking water [PDF]

open access: yes, 2013
An optimized method is presented using liquid-liquid extraction and derivatization for the extraction of iodoacetic acid (IAA) and other haloacetic acids (HAA9) and direct extraction of iodoform (IF) and other trihalomethanes (THM4) from drinking water ...
He, G   +6 more
core   +6 more sources

Microfibers for juice analysis by solid-phase microextraction. [PDF]

open access: yes, 2008
In view of the interest in analyzing volatile compounds by SPME, the following five microfibers were tested, polydimethylsiloxane; polyacrylate; polydimethylsiloxane/divinylbenzene; carboxen/polydimethylsiloxane, and carbowax/divinylbenzene, to select ...
Bizzo, Humberto Ribeiro   +3 more
core   +3 more sources

Development of Salt Induced Liquid–Liquid Extraction Combined with Amine Based Deep Eutectic Solvent-Dispersive Liquid–Liquid Microextraction; An Efficient Analytical Method for Determination of Three Anti-Seizures in Urine Samples [PDF]

open access: yesPharmaceutical Sciences, 2020
Background: A simple, fast, efficient, and environmentally friendly microextraction technique named salt induced liquid-liquid extraction combined with amine based deep eutectic solvent-dispersive liquid-liquid microextraction method followed by gas ...
Fatemeh Soltanmohammadi   +3 more
doaj   +1 more source

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