Ni doping in CuO: A highly sensitive electrode for sensing ammonia in ppm level using lanthanum gallate based electrolyte

2019 ◽  
Vol 118 ◽  
pp. 110478 ◽  
Author(s):  
S. Nithya ◽  
R. Sharan ◽  
Mainak Roy ◽  
Hack Ho Kim ◽  
Tatsumi Ishihara ◽  
...  
Keyword(s):  
Lanthanum Gallate ◽  
Ni Doping ◽  
Highly Sensitive ◽  
Sensitive Electrode ◽  
Ppm Level

A new method to measure nitrate/nitrite with a NO-sensitive electrode

2001 ◽  
Vol 90 (1) ◽  
pp. 317-320 ◽  
Author(s):  
Reinhard Berkels ◽  
Svenja Purol-Schnabel ◽  
Renate Roesen
Keyword(s):  
Degradation Products ◽  
New Method ◽  
Guinea Pig Heart ◽  
Porcine Aortic Endothelial Cell ◽  
Highly Sensitive ◽  
Endothelial Cell Cultures ◽  
Iodide Solution ◽  
Nitrate And Nitrite ◽  
Sensitive Electrode ◽  
Unstable Molecule

There are different methods to measure the unstable molecule nitric oxide (NO). We will describe a new sensitive method to measure NO by reconversion of nitrate/nitrite to NO, which will be determined with an amperometric Clark-type electrode. Nitrate and nitrite are the degradation products of NO. First, nitrate is enzymatically converted to nitrite with the use of the nitrate reductase. Second, nitrite is reduced to equimolar NO concentrations by an acidic iodide solution. The detection limit of the electrode in an aqueous solution was 2 nmol/l NO (meaning the threshold was depending on the volume added: 500 μl of a 0.2 μmol/l nitrite solution added to a 10-ml bath). This method provides the ability to assess basal and agonist-stimulated NO releases of different biological models. We measured basal and carbachol-stimulated NO release of native endothelial cells from porcine coronary arteries and porcine aortic endothelial cell cultures. Moreover, it was possible to measure the nitrate/nitrite concentration in the coronary effluent of a guinea pig heart. In conclusion, we present a valid, highly sensitive new method of measuring nitrite/NO in biological systems with a commercially available electrode.

scholarly journals Graphene chemiresistors modified with functionalized triphenylene for highly sensitive and selective detection of dimethyl methylphosphonate

RSC Advances ◽  
2019 ◽  
Vol 9 (58) ◽  
pp. 33976-33980 ◽  
Author(s):  
Yun-Tae Kim ◽  
Seongwoo Lee ◽  
Sanghwan Park ◽  
Chang Young Lee
Keyword(s):  
Gas Sensors ◽  
Nerve Agent ◽  
Selective Detection ◽  
Dimethyl Methylphosphonate ◽  
Highly Sensitive ◽  
Ppm Level

Graphene gas sensors functionalized with substituted triphenylene selectively detect DMMP, a simulant of nerve agent, at low ppm level.

A Novel, Interpenetrating Metal–Organic Framework: Synthesis, Structure, and Luminescence Detection of Nitrobenzene

2017 ◽  
Vol 70 (7) ◽  
pp. 792 ◽  
Author(s):  
Peng-Fei Shi ◽  
Li-Xian Wang ◽  
Zhao-Peng Yu
Keyword(s):  
Metal Organic Framework ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solvent Stability ◽  
Qualitative Detection ◽  
Highly Sensitive ◽  
Metal Organic ◽  
First Time ◽  
Ppm Level ◽  
Organic Framework

A 3D heterometal–organic framework {[TbZn(BPDC)2(HCOO)(H2O)3]·2H2O}n (1) was constructed from Tb3+ and Zn2+ as metal ions and 4,4′-dicarboxylate-2,2′-dipyridine (H2BPDC) as the ligand using a solvothermal method. Single-crystal X-ray diffraction analysis revealed that compound 1 is 2-fold interpenetrating. Thermogravimetric and solvent stability analyses demonstrated that compound 1 displayed good thermal and solvent stabilities. The luminescent explorations revealed that compound 1 exhibited highly sensitive and qualitative detection of nitrobenzene at the ppm level. To our knowledge, the present study reports for the first time the use of an interpenetrating heterometallic metal–organic framework as a luminescent probe for nitrobenzene.

Sensing Properties of Sub-ppm Level NO2 Gas Sensor Based on YSZ and WO3 Sensing Electrode

2014 ◽  
Vol 633 ◽  
pp. 512-515
Author(s):  
Xia Sun ◽  
Guo Liang Zhou ◽  
Chuan Long Pan ◽  
Cheng Zhang ◽  
Tao Feng
Keyword(s):  
Gas Sensor ◽  
Gas Sensors ◽  
Electrode Surface ◽  
Reference Electrode ◽  
Mixed Potential ◽  
Response Signal ◽  
Preparation Methods ◽  
Sensing Properties ◽  
Sensitive Electrode ◽  
Ppm Level

In this paper, the gas sensors using WO3 as sensitive electrode, Pt mixed potential as the reference electrode was researched. The structures and preparation methods of the sensors were introduced. Besides, the sensitive materials, the electrode surface and the section morphologies were characterized by means of SEM and EDS. Furthermore, the sensing properties of the as-fabricated sensors were examined under different NOX concentrations and temperatures (500°C, 550°C and 600°C). The results revealed that the response signal become smaller with the temperature increasing, and stronger with the increasing of the NO2 concentration.

Sweat Chloride Measurement With a Highly Sensitive Electrode

Pancreas ◽  
2006 ◽  
Vol 33 (1) ◽  
pp. 100 ◽  
Author(s):  
Saturo Naruse ◽  
Hiroshi Ishiguro ◽  
Keiichi Shirota ◽  
Miyuki Nakakuki ◽  
Akiko Yamamoto ◽  
...  
Keyword(s):  
Sweat Chloride ◽  
Highly Sensitive ◽  
Sensitive Electrode

Highly sensitive electrode materials for the voltammetric determination of nitrofurantoin based on zinc cobaltate nanosheets

2020 ◽  
Vol 44 (28) ◽  
pp. 12036-12047
Author(s):  
Chelliah Koventhan ◽  
Venkatachalam Vinothkumar ◽  
Shen-Ming Chen ◽  
Arumugam Sangili
Keyword(s):  
Electrocatalytic Activity ◽  
Electrode Materials ◽  
Voltammetric Determination ◽  
Highly Sensitive ◽  
Sensitive Electrode

Schematic illustration of the electrocatalytic activity of nitrofurantoin (NFT) on ZnCo2O4 nanosheets.

Realization of ppm-level CO detection with exceptionally high sensitivity using reduced graphene oxide-loaded SnO2 nanofibers with simultaneous Au functionalization

2016 ◽  
Vol 52 (19) ◽  
pp. 3832-3835 ◽  
Author(s):  
Jae-Hun Kim ◽  
Akash Katoch ◽  
Hyoun Woo Kim ◽  
Sang Sub Kim
Keyword(s):  
Carbon Monoxide ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Sensitivity ◽  
Reduced Graphene ◽  
Highly Sensitive ◽  
Co Detection ◽  
Ppm Level

We have realized the highly sensitive, selective ppm-level carbon monoxide (CO) detection based on graphene oxide (RGO) nanosheets-loaded SnO2 nanofibers with simultaneous Au functionalization.

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