Xanthine sensor development based on ZnO–CNT, ZnO–CB, ZnO–GO and ZnO nanoparticles: an electrochemical approach

2017 ◽  
Vol 41 (14) ◽  
pp. 6262-6271 ◽  
Author(s):  
Mohammed M. Rahman ◽  
Hadi M. Marwani ◽  
Faisal K. Algethami ◽  
Abdullah M. Asiri
Keyword(s):  
Zno Nanoparticles ◽  
Dynamic Range ◽  
Linear Dynamic Range ◽  
Wet Chemical Method ◽  
Linear Dynamic ◽  
Lower Detection Limit ◽  
Electrochemical Approach ◽  
Lower Detection ◽  
Wet Chemical ◽  
Higher Sensitivity

The wet-chemical method was used to prepare the various ZnO–CNT, ZnO–CB, ZnO–GO nanocomposites, and ZnO nanoparticles in higher pH medium, which were finally utilized with 5% nafion to produce a thin film of NCs/Nafion/GCE sensor that has a faster response towards selected xanthine with higher sensitivity, lower detection limit, and large linear dynamic range by electrochemical approach.

One-step wet-chemical synthesis of ternary ZnO/CuO/Co3O4 nanoparticles for sensitive and selective melamine sensor development

2019 ◽  
Vol 43 (12) ◽  
pp. 4849-4858 ◽  
Author(s):  
M. M. Alam ◽  
Abdullah M. Asiri ◽  
M. T. Uddin ◽  
Inamuddin Inamuddin ◽  
M. A. Islam ◽  
...  
Keyword(s):  
Chemical Sensor ◽  
Dynamic Range ◽  
Fast Response ◽  
Co3o4 Nanoparticles ◽  
Linear Dynamic Range ◽  
Wet Chemical Synthesis ◽  
Electrochemical Approach ◽  
One Step ◽  
Wet Chemical ◽  
Sensor Probe

Using one-step wet-chemically synthesized ternary ZnO/CuO/Co3O4 nanoparticles (NPs) fabricated GCE sensor probe, a selective and sensitive melamine chemical sensor was developed by electrochemical approach, which exhibited the highest sensitivity, better repeatability, broad linear dynamic range, good linearity, fast response time, and lowest detection limit.

Convenient Fiber-Optic-Based Sample Cell for Shpol'skii and Low-Temperature Phosphorescence Spectrometry

1989 ◽  
Vol 43 (3) ◽  
pp. 422-425 ◽  
Author(s):  
Richard T. Madison ◽  
Mary K. Carroll ◽  
Gary M. Hieftje
Keyword(s):  
Low Temperature ◽  
Fiber Optic ◽  
Dynamic Range ◽  
Detection Limits ◽  
Linear Dynamic Range ◽  
Sample Cell ◽  
Linear Dynamic ◽  
Light Guides

A sample cell for observing the Shpol'skii effect at 77 K is described and analytically assessed. The cell employs fiber-optic light guides to transport excitation and emission radiation. The system is compact, inexpensive, and simple to construct from commercially available laboratory components, and it alleviates several problems inherent in conventional refrigerated-cell designs. Detection limits for anthracene, coronene, and pyrene obtained with the sample cell are 8.8 × 10−8 M, 8.4 × 10−7 M, and 3.5 × 10−7 M, respectively. The linear dynamic range for each compound is 2 to 3 orders of magnitude.

New noncompetitive immunoassays of small analytes

1995 ◽  
Vol 41 (7) ◽  
pp. 986-990 ◽  
Author(s):  
U Piran ◽  
W J Riordan ◽  
L A Livshin
Keyword(s):  
Detection Limit ◽  
Liquid Phase ◽  
Binding Sites ◽  
Dynamic Range ◽  
Lower Detection Limit ◽  
Controlled Pore Glass ◽  
Lower Detection ◽  
Pore Glass ◽  
Clinically Significant ◽  
Acridinium Ester

Abstract We developed a novel noncompetitive immunoassay format for monoepitopic analytes and describe here a model assay for triiodothyronine (T3), performed on Ciba Corning's ACS:180 analyzer. Acridinium ester (AE)-labeled bivalent anti-T3 was incubated with the sample, producing AE-anti-T3/T3 complexes and unreacted AE-anti-T3. Controlled-pore glass particles (CPG) with immobilized diiodothyronine (T2) were then added in excess, to bind AE-anti-T3 possessing two unoccupied binding sites but not AE-anti-T3 bound to one or two T3 molecules. Paramagnetic particles (PMP) with immobilized anti-AE were then added to the same cuvette to capture AE-anti-T3/T3 complexes; AE-anti-T3 bound to the surface of CPG, however, was not captured, because of steric hindrance. After the incubation, the PMP was magnetically separated to remove the liquid phase and the suspended CPG from the cuvette. The chemiluminescence associate with the PMP remaining in the cuvette was then measured. This noncompetitive T3 assay exhibited a 10-fold lower detection limit than the equivalent competitive T3 assay, i.e., 0.3 vs pg/test. Imprecision (CV) in the clinically significant range was 6% or less. The assay also displayed two- to sevenfold lower cross-reactivities and a wider dynamic range.

scholarly journals Single particle inductively coupled plasma mass spectrometry: investigating nonlinear response observed in pulse counting mode and extending the linear dynamic range by compensating for dead time related count losses on a microsecond timescale

2020 ◽  
Vol 35 (1) ◽  
pp. 84-99 ◽  
Author(s):  
Ingo Strenge ◽  
Carsten Engelhard
Keyword(s):  
Inductively Coupled Plasma ◽  
Nonlinear Response ◽  
Dynamic Range ◽  
Dead Time ◽  
Linear Dynamic Range ◽  
Pulse Counting ◽  
Inductively Coupled ◽  
Linear Dynamic ◽  
Order Of Magnitude ◽  
Plasma Mass Spectrometry

Sampling of the pulse-counting signal with μs time-resolution provided a functional compensation for dead-time related count losses in spICP-MS, ultimately improving the linear dynamic range by one order of magnitude towards higher count rates.

A study on the quick measuring method of linear dynamic range of receiver

Measurement ◽  
2015 ◽  
Vol 59 ◽  
pp. 237-240 ◽  
Author(s):  
Jinbao Yao ◽  
Baoping Tang ◽  
Jie Zhao
Keyword(s):  
Dynamic Range ◽  
Measuring Method ◽  
Linear Dynamic Range ◽  
Linear Dynamic
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