A highly uniform CuO@SiO2 porous sphere with improved electrochemical sensing performance for the accurate determination of vanillin in food samples

2021 ◽  
Vol 22 ◽  
pp. 100554
Author(s):  
A. Venkadesh ◽  
J. Mathiyarasu ◽  
S. Radhakrishnan
Keyword(s):  
Accurate Determination ◽  
Food Samples ◽  
Electrochemical Sensing ◽  
Porous Sphere ◽  
Highly Uniform ◽  
Sensing Performance

Ultrasensitive determination of chloramphenicol in pork and chicken meat samples using a portable electrochemical sensor: effects of 2D nanomaterials on the sensing performance and stability

2021 ◽  
Author(s):  
Ngo Xuan Dinh ◽  
Tuyet Nhung Pham ◽  
Tran Quang Huy ◽  
Do Quang Trung ◽  
Pham Anh Tuan ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Food Samples ◽  
Chicken Meat ◽  
Electrochemical Sensing ◽  
Portable Sensors ◽  
2D Nanomaterials ◽  
Meat Samples ◽  
Sensing Performance

This work contributes to a deeper understanding of the effects of functional 2D nanomaterials on the electrochemical sensing performance of SPE-based portable sensors for the rapid, accurate, and on-site determination of CAP in food samples.

Novel electroanalytical platform based on bimetallic oxide nanospheres for the sensitive determination of Rhodamine B

2014 ◽  
Vol 92 (7) ◽  
pp. 640-646 ◽  
Author(s):  
Junyong Sun ◽  
Tian Gan ◽  
Cui Yang ◽  
Zhaoxia Shi ◽  
Kejing Huang ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Rhodamine B ◽  
Differential Pulse ◽  
Food Samples ◽  
Electrochemical Sensing ◽  
Cobalt Nickel ◽  
Sensing Platform ◽  
Sensitive Determination ◽  
Cobalt Nickel Oxide

In this work, uniform cobalt and nickel bimetallic oxides were formed by calcining the carbon templates, which were then modified on a glassy carbon electrode (cobalt–nickel oxide/GCE) as a novel system for the preparation of an electrochemical sensing platform. The electrochemical oxidation behavior of Rhodamine B (RB) at the cobalt–nickel oxide/GCE was investigated using differential pulse voltammetry under optimal conditions; the high electrocatalytic activity of the modified electrode toward analysis of RB was indicated. In addition, a linear range of 0.03−1.0 μmol L–1 and a low detection limit of 5.3 nmol L–1 (S/N = 3) for RB detection were obtained. Finally, the developed method with good stability and sensitivity was successfully applied for RB determination in food samples extract.

Accurate determination of arsenic and selenium in plant food samples by using ICP-MS/MS

2016 ◽  
Vol 8 (32) ◽  
pp. 6150-6157 ◽  
Author(s):  
Xianqiao Hu ◽  
Zhaoyun Cao ◽  
Weihua Sun ◽  
Huan Yang ◽  
Ping Xu ◽  
...  
Keyword(s):  
Accurate Determination ◽  
Food Samples ◽  
Mass Shift ◽  
Plant Food ◽  
Doubly Charged Ions ◽  
Icp Ms ◽  
Doubly Charged ◽  
Charged Ions

In this paper, the influence of polyatomic and doubly charged ions on determination of As and Se was evaluated in four different modes. It was found that O2 mass-shift mode was an effective method to remove all interferences.

A quantitative approach to inner shell losses

1978 ◽  
Vol 36 (1) ◽  
pp. 526-527 ◽  
Author(s):  
R.D. Leapman ◽  
P. Rez ◽  
D.F. Mayers
Keyword(s):  
Energy Transfer ◽  
Cross Section ◽  
Cross Sections ◽  
Accurate Determination ◽  
Background Intensity ◽  
Core Excitation ◽  
Quantitative Basis ◽  
Cross Section Differential ◽  
Bound Electrons

Microanalysis by EELS has been developing rapidly and though the general form of the spectrum is now understood there is a need to put the technique on a more quantitative basis (1,2). Certain aspects important for microanalysis include: (i) accurate determination of the partial cross sections, σx(α,ΔE) for core excitation when scattering lies inside collection angle a and energy range ΔE above the edge, (ii) behavior of the background intensity due to excitation of less strongly bound electrons, necessary for extrapolation beneath the signal of interest, (iii) departures from the simple hydrogenic K-edge seen in L and M losses, effecting σx and complicating microanalysis. Such problems might be approached empirically but here we describe how computation can elucidate the spectrum shape.The inelastic cross section differential with respect to energy transfer E and momentum transfer q for electrons of energy E0 and velocity v can be written as

Fast calibration of CBED patterns for quantitative analysis

1993 ◽  
Vol 51 ◽  
pp. 674-675
Author(s):  
M.A. Gribelyuk ◽  
M. Rühle
Keyword(s):  
Reciprocal Lattice ◽  
Accurate Determination ◽  
Incident Beam ◽  
Crystal Thickness ◽  
Structure Model ◽  
Beam Direction ◽  
Transmitted Beam ◽  
Reciprocal Vector ◽  
On Line

A new method is suggested for the accurate determination of the incident beam direction K, crystal thickness t and the coordinates of the basic reciprocal lattice vectors V1 and V2 (Fig. 1) of the ZOLZ plans in pixels of the digitized 2-D CBED pattern. For a given structure model and some estimated values Vest and Kest of some point O in the CBED pattern a set of line scans AkBk is chosen so that all the scans are located within CBED disks.The points on line scans AkBk are conjugate to those on A0B0 since they are shifted by the reciprocal vector gk with respect to each other. As many conjugate scans are considered as CBED disks fall into the energy filtered region of the experimental pattern. Electron intensities of the transmitted beam I0 and diffracted beams Igk for all points on conjugate scans are found as a function of crystal thickness t on the basis of the full dynamical calculation.

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