Results 61 to 70 of about 20,968 (228)

Uso de extração em fase sólida para determinação de metais em amostras aquosas através de espectrometria atômica em chama [PDF]

, 2005
TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Físicas e Matemáticas. Curso de Química.Neste trabalho foi desenvolvido uma metodologia para determinação de zinco em matrizes aquosas utilizando processo de extração em fase ...
Carlletto, Jeferson Schneider
core  

Strategies for enhancing sensitivity in lateral flow assays

VIEW, EarlyView.
Lateral flow assays (LFAs) are essential for cost‐effective, rapid point‐of‐care diagnostics. However, conventional colourimetric LFAs often lack the sensitivity required for low‐abundance biomarkers. This review evaluates six enhancement strategies: flow modulation, sample preconcentration, advanced reporters, chemical signal amplification, structural
Aylar Eslami Saed, Jacopo Giaretta, Syamak Farajikhah, Fariba Dehghani   +3 more
wiley   +1 more source

Preconcentration of metal ions using microbacteria [PDF]

, 2013
WOS: 000320862100001This review (160 refs). covers the current state of the art of microbacteria-based sorbents for preconcentration of metal ions at trace levels.
Kilinc, Ersin, Dundar, Abdurrahman, Ersin Kılınç, Veysi Okumuş, Ozdemir, Sadin, Kılınç, Ersin, Okumus, Veysi, Sadin Özdemir, Abdurrahman Dündar   +8 more
core   +2 more sources

Copper, zinc and manganese determination in saline samples employing faas after separation and preconcentration on Amberlite XAD-7 and Dowex 1x-8 loaded with Alizarin Red S

Journal of the Brazilian Chemical Society, 2004
Two procedures have been proposed and compared for separation and preconcentration of trace amounts of manganese, copper, and zinc in saline samples. The procedures are based in the use of Amberlite XAD-7 and an anion-exchanger Dowex 1X8-50 loaded with ...
Korn Maria das Graças A., Santos Jr. Aníbal de Freitas, Jaeger Helena V., Silva Nívia Maria S., Costa Antônio C. Spínola   +4 more
doaj  

Schiff Base‐UiO66 Composite‐based Dispersive Micro Solid‐Phase Extraction of Pesticides From Fruit Juices Combined With Dispersive Liquid‐Liquid Microextraction Prior to Gas Chromatography‐Flame Ionisation Detection

Analytical Science Advances, Volume 7, Issue 2, December 2026.
ABSTRACT A dispersive micro solid‐phase extraction method was introduced using a Schiff base‐UiO66 nanocomposite as the adsorbent in the extraction of multi‐class pesticide residues in pear, cherry, grape, and apricot juices. The extraction procedure was hyphenated with a liquid‐phase microextraction procedure, providing a high preconcentration factor ...
Behnam Hosseininezhad, Mahdi Bomorovat, Mahboob Nemati, Mir Ali Farajzadeh, Ramin Atazadeh, Mohammad Reza Afshar Mogaddam   +5 more
wiley   +1 more source

Síntese, caracterização e aplicação analítica do biopolímero quitosana funcionalizado com quelantes hidroxibenzopiridínicos [PDF]

, 2005
Tese (Doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-graduação em QuímicaEste trabalho descreve as funcionalizações do biopolímero quitosana, usando os agentes complexantes 8 ...
Martins, Amarildo Otávio
core  

selective preconcentration

, 2014
Citation: 'selective preconcentration' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.S05559 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Anolyte Selection Framework for Iodide Oxidation Coupled Hydrogen Evolution‐Based Hybrid Electrolysis Process

ChemElectroChem, Volume 13, Issue 19, 1 October 2026.
Investigation of anolyte composition in IOR‐coupled hybrid electrolysis shows that anolyte composition dictates open‐circuit voltage and cell resistance rather than net activation overpotential. Lower I2/HI and higher HI/H2O ratios reduce cell voltage.
Ashwin Yashwanth, Shanon Viegas, Rajesh Kumar, Parvatalu Damaraju, Pradeep Kumar Sow   +4 more
wiley   +1 more source

Layout and dimensions of preconcentration chip.

, 2014
Layout and dimensions of preconcentration chip.
Tamara G. Amstislavskaya (598275), Yu-Hung Chen (598277), Chun-Ping Jen (598274), Chen-Chi Kuo (598276)   +3 more
core   +1 more source

ZIF‐8‐Based Solid‐Phase Extraction Coupled With Derivative UV‐Vis Spectrophotometry for Rapid Simultaneous Determination of Hesperidin and Naringin in Citrus Peels

Chemistry–Methods, Volume 6, Issue 10, October 2026.
This graphical abstract illustrates the synthesis and application of ZIF‐8 as a solid‐phase extraction sorbent for the simultaneous determination of hesperidin and naringin in citrus peels. ZIF‐8 was synthesized from zinc nitrate hexahydrate and 2‐methylimidazole, followed by mixing, centrifugation, and drying.
Akram Sadat Nabavi, Sayed Mehdi Ghoreishi, Fateme Tajabadi   +2 more
wiley   +1 more source