نتایج جستجو برای: analyte

تعداد نتایج: 8602  

Journal: :Journal of pharmaceutical and biomedical analysis 2007
Sherry Wang Matthew Cyronak Eric Yang

A stable isotopically labeled (SIL) analogue is believed to be the most appropriate internal standard in a quantitative bioanalytical liquid chromatography/tandem mass spectrometry (LC/MS/MS) assay. It is assumed that a SIL internal standard always compensates for variability in chemical derivatization, sample extraction and LC/MS/MS analysis due to its nearly identical chemical and physical pr...

2017
P. Visconti R. de Fazio

This research work regards the design and realization of an absorption spectrophotometer based on a LED light source in place of the usually employed Xenon lamp. The advantage of the use of LED technology resides in several factors such as the reducing of the analyte temperature variations and thus noise generation, which occur if a Xenon light source is used, beside of the high luminous effici...

Journal: :Chemical communications 2011
James Giammarco Bogdan Zdyrko Laeticia Petit J David Musgraves Juejun Hu Anu Agarwal Lionel Kimerling Kathleen Richardson Igor Luzinov

Polymer multilayered nanocoating capable of concentrating various chemical substances at IR-ATR waveguide surfaces is described. The coating affinity to an analyte played a pivotal role in sensitivity enhancement of the IR-ATR measurements, since the unmodified waveguide did not show any analyte detection.

Journal: :Chemical communications 2013
Wei Hong Haoran Li Xiaobin Hu Binyuan Zhao Fan Zhang Di Zhang Zhou Xu

Herein we present a highly sensitive sensing method combining amphiphilic molecules and wettability gradient photonic hydrogels for molecular recognition and chemical sensing applications. These wettability gradient photonic films exhibit low analyte amount, fast response, as well as interference resistance, which enable them for applications in forgery detection and visual determination of ana...

Journal: :Analytical chemistry 2005
E T S Skibsted H F M Boelens J A Westerhuis A K Smilde N W Broad D R Rees D T Witte

Net analyte signal statistical quality control (NAS-SQC) is a new methodology to perform multivariate product quality monitoring based on the net analyte signal approach. The main advantage of NAS-SQC is that the systematic variation in the product due to the analyte (or property) of interest is separated from the remaining systematic variation due to all other compounds in the matrix. This enh...

2003
Willfried Schramm Se - Hwan Pack

In an attempt to optimize immunosensors operating with an immobilized antibody as binding protein and an analyte-enzyme conjugate as signal generator that is signitlcantly larger in molecular size than the analyte, in a previous communication (Part I) (S.-H. Paek and W. Schramm (1991) Anal. Biochem. 196) we developed mathematical models for the prediction of performance characteristics. These m...

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