<span>In this paper, we investigate a hexagonal two-layer photonic crystal fiber based on surface plasmon resonance (HT-PCF-SPR) which is easy to fabricate as sensor for detecting the refractive index of analytes. After performing numerical simulations using COMSOL multiphysics finite element method (FEM), it was found that HT-PCF-SPR could detect analyte's in range 1.34-1.37 RIU and wave...

Gold- and silver nanoparticles (Au NPs Ag NPs)-based colorimetric detection of specific analytes has attracted intense research interest is still in great demand. The majority Au NPs- NPs-based sensory reports have revealed that, during the analyte recognition, dispersed typically aggregated displayed color changes from wine-red to blue/purple yellow orange/brown, respectively. On other hand, o...

A novel concept for capillary electrophoresis-mass spectrometry (CE-MS) studies of neutral analytes is presented. The experimental approach is based on the implementation of electrochemically assisted injection (EAI) which enables the generation of charged species from neutral analytes. In this way electrophoretic separations can be performed without the use of surfactants leading to an excelle...

Chiroptical switches have found application in the detection of a multitude of different analytes with a high level of sensitivity and in asymmetric catalysis to offer switchable stereoselectivity. A wide range of scaffolds have been employed that respond to metals, small molecules, anions and other analytes. Not only have chiroptical systems been used to detect the presence of analytes, but al...

We describe a new discrete microprocessor-controlled analyzer, the AN2000, which fully automates fluorometric immunoassays by using a magnetic separation of the solid phase and an alkaline phosphatase label. It can operate in random-access or batch mode with a dwell time typically less than 20 min. The analysis rate is 75 samples per hour and the system can hold refrigerated reagents for as man...

Here we investigate the effect of lithium iodide and cetyltrimethylammonium (CTA) bromide additives on the ability of LiMo(3)Se(3) nanowire film sensors to bind and detect organic solvents electrically. Both additives decrease the electrical conductivity of the films. Lithium iodide increases the response of the films to both polar and nonpolar analytes. CTA increases the response of the films ...

A method for the preconcentration of Cu, Fe, Pb, Ni, Cd and Bi as their diethyldithiocarbamate chelates was proposed using a column filled with Amberlite XAD-4 resin. The retained analytes on the resin were recovered with a small volume of acetone. The metal ions in the effluent were determined by a flame atomic absorption spectrometer. Different factors including pH of sample solution, sample ...