Results 81 to 90 of about 6,944 (194)

PREPARO DE AMOSTRAS ASSISTIDO POR CAMPO ELÉTRICO: FUNDAMENTOS, AVANÇOS, APLICAÇÕES E TENDÊNCIAS

Química Nova, 2015
Sample preparation is commonly considered a key step to achieve selective, sensitive, and reliable chemical analyses, particularly those involving complex matrices. Although the application of electric fields to improve the speed and efficiency of sample
Camila D. M. Campos, Richard P. S. de Campos, José A. Fracassi da Silva, Dosil P. Jesus, Ricardo M. Orlando   +4 more
doaj   +1 more source

Development of Zeolite Imidazole Framework-Based Adsorbent for Effective Microextraction and Preconcentration of Histamine in Food Samples

Foods
This study is the first to focus on the preconcentration and determination of histamine (HIS) in food samples using zeolite imidazole frameworks (ZIFs) on a solid-phase microextraction (SPME) platform.
Abdullah Khalid Omer, Hossein Tajik, Rahim Molaei, Mehran Moradi   +3 more
doaj   +1 more source

Synthesis, characterization and determination of the metal ions adsorption capacity of cellulose modified with p-aminobenzoic groups

Materials Research, 2004
This paper describes the synthesis and characterization of p-aminobenzoic modified cellulose (Cell-PAB), as well as the separation and preconcentration of Cd(II), Cu(II), Ni(II), Pb(II) and Zn(II) ions from an aqueous medium using a Cell-PAB bath and the
Gustavo Rocha de Castro, Ilton Luiz de Alcântara, Paulo dos Santos Roldan, Dorotéia de Fátima Bozano, Pedro de Magalhães Padilha, Ariovaldo de Oliveira Florentino, Julio Cesar Rocha   +6 more
doaj   +1 more source

Determination of iron in natural and mineral waters by flame atomic absorption spectrometry [PDF]

Journal of the Serbian Chemical Society, 2004
Simple methods for the determination of Fe in natural and mineral waters by flame atomic absorption spectrometry (AAS) are suggested. The results of the investigation of selectivity of the proposed AAS method proved that this procedure is not affected by
ROLANDAS KAZLAUSKAS, LAURA STEPONENIENE, STASYS TAUTKUS   +2 more
doaj  

A sensitive method for atmospheric sulfur dioxide determination by reaction cell inductively coupled plasma mass spectrometer

Royal Society Open Science
A sensitive method for sulfur dioxide (SO2) determination was developed with reaction cell inductively coupled plasma mass spectrometer (ICP-MS) by preconcentrating SO2 from gas samples to solutions.
Qi-Xuan Sun, Bo Li, Xiao-Ping Kong, Shang-Qing Zhang   +3 more
doaj   +1 more source

Protein preconcentrator [PDF]

Analytical Chemistry, 2005
openaire   +1 more source

Development of a Tannic Acid-Gelatin Modified Filter Paper Membrane for Trace Lead Detection in Water. [PDF]

ACS Omega
Rattanadechawan A, Choengchan N, Mantim T, Donpudsa S, Karuwan C, Ratanawimarnwong N.   +5 more
europepmc   +1 more source

Mercury preconcentration on gold coated mica column and investigation of preconcentration condition

, 2004
DC ABSTRACT MERCURY PRECONCENTRATION ON GOLD COATED MICA COLUMN AND INVESTIGATION OF PRECONCENTRATION CONDITIONS GURAY, Ahmet MSc Thesis in Chemistry Supervisor: Prof. Dr. Hüseyin TURAL September 2004, 52 pages Cold Vapor AAS technique is a kind of sensitive mercury determination techniques.
openaire   +2 more sources

Sustainable ionic liquid-assisted cloud point extraction for enrichment of trace copper(II) in water and food samples prior to spectrophotometric determination. [PDF]

Sci Rep
El-Bialy NMA, Gouda AA, Ghaith EIA, Khedr IE, Moustafa AH, Mohamed AA, Ismaiel AM.   +6 more
europepmc   +1 more source

Detection of bilirubin by stripping voltammetry at the gelled anisole - aqueous electrified interface supported with a 3D printed pore. [PDF]

Mikrochim Acta
Marciniak K, Rudnicki K, Kowalewska K, Kowalski G, Poltorak M, Walecka I, Herzog G, Poltorak L.   +7 more
europepmc   +1 more source