نتایج جستجو برای: net analyte signal

تعداد نتایج: 520623  

Journal: :iranian journal of pharmaceutical research 0
vahid farzanehfar department of pharmacology and toxicology, school of pharmacy, shahid beheshti university of medical sciences,tehran, iran. mehrdad faizi department of pharmacology and toxicology, school of pharmacy, shahid beheshti university of medical sciences,tehran, iran. nima naderi department of pharmacology and toxicology, school of pharmacy, shahid beheshti university of medical sciences,tehran, iran. farzad kobarfard -

dibutyl phthalate (dbp) is a phthalic acid ester and is widely used in polymeric products to make them more flexible. dbp is found in almost every plastic material and is believed to be persistent in the environment. various analytical methods have been used to measure dbp in different matrices. considering the ubiquitous nature of dbp, the most important challenge in dbp analyses is the contam...

Journal: :Journal of chromatography. A 2003
Michelangelo Anastassiades Katerina Mastovská Steven J Lehotay

A common problem in gas chromatography (GC) applications is the analyte losses and/or peak tailing due to undesired interactions with active sites in the inlet and column. Analytes that give poor peak shapes or degrade have higher detection limits, are more difficult to identify and integrate, and are more prone to interferences than stable analytes that give narrow peaks. For susceptible analy...

2014
Jason R. Becker Patrick J. Skrodzki Ahmed Hassanein

Laser-induced breakdown spectroscopy [LIBS] is a commonly used technique for multi-element analyses for various applications such as space exploration, nuclear forensics, environmental analysis, process monitoring. The advantages of the LIBS technique include robustness, ease of use, field portability, and real-time, non-invasive multi-element analyses. However, in comparison to other lab based...

Journal: :Microbial Cell Factories 2006
Rosa María Ferraz Andrea Vera Anna Arís Antonio Villaverde

The quantitative detection of low analyte concentrations in complex samples is becoming an urgent need in biomedical, food and environmental fields. Biosensors, being hybrid devices composed by a biological receptor and a signal transducer, represent valuable alternatives to non biological analytical instruments because of the high specificity of the biomolecular recognition. The vast range of ...

Journal: :Analytical and Bioanalytical Chemistry 2010

Journal: :Journal of chromatography. A 2010
Fabio Gosetti Eleonora Mazzucco Davide Zampieri Maria Carla Gennaro

The review discusses the pitfalls of the matrix effect in mass spectrometry detection hyphenated to liquid chromatography separation. Matrix effect heavily influences both qualitative and quantitative analyses, giving rise to suppression or enhancement of the signal. As generally recognised, the predominant cause is the presence of undesired components that co-elute in the chromatographic separ...

Journal: :Analytical and bioanalytical chemistry 2006
Laura Gámiz-Gracia Luis Cuadros-Rodríguez Jorge J Soto-Chinchilla José F Huertas-Pérez Antonio González-Casado Ana M García-Campaña

A new strategy is proposed for verifying if recovery factor is constant and independent of the real analyte content of samples. A signal-recovery function has been developed on the basis of measurement of spiked test samples before and after a pre-treatment step and considering, as starting point, a recent IUPAC recommendation which distinguishes between two terms--recovery factor, R, and appar...

Journal: :Analytical chemistry 2010
M Bercovici G V Kaigala J G Santiago

We present a novel method for identification of unlabeled analytes using fluorescent carrier ampholytes and isotachophoresis (ITP). The method is based on previous work where we showed that the ITP displacement of carrier ampholytes can be used for detection of unlabeled (nonfluorescent) analytes. We here propose a signal analysis method based on integration of the associated fluorescent signal...

Journal: :ACS applied materials & interfaces 2016
Stefan Schrittwieser Beatriz Pelaz Wolfgang J Parak Sergio Lentijo-Mozo Katerina Soulantica Jan Dieckhoff Frank Ludwig Thomas Altantzis Sara Bals Joerg Schotter

Studying protein interactions is of vital importance both to fundamental biology research and to medical applications. Here, we report on the experimental proof of a universally applicable label-free homogeneous platform for rapid protein analysis. It is based on optically detecting changes in the rotational dynamics of magnetically agitated core-shell nanorods upon their specific interaction w...

2014
Stephen M. Oja Joshua P. Guerrette Michelle R. David Bo Zhang

Recently, we introduced a new electrochemical imaging technique called fluorescence-enabled electrochemical microscopy (FFEM). The central idea of FEEM is that a closed bipolar electrode is utilized to electrically couple a redox reaction of interest to a complementary fluorogenic reaction converting an electrochemical signal into a fluorescent signal. This simple strategy enables one to use fl...

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