Direct in situ measurement of dissolved zinc in the presence of zinc oxide nanoparticles using anodic stripping voltammetry

2014 ◽  
Vol 16 (11) ◽  
pp. 2536-2544 ◽  
Author(s):  
Chuanjia Jiang ◽  
Heileen Hsu-Kim
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Primary Particle ◽  
Zinc Concentration ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Oxide Nanoparticles ◽  
Anodic Stripping ◽  
20 Nm

Anodic stripping voltammetry can be used to measure the dissolved zinc concentration in aqueous suspensions of ZnO nanoparticles with primary particle diameters of 20 nm or larger.

Development of a deep-sea mercury sensor using in situ anodic stripping voltammetry

2015 ◽  
Vol 49 (6) ◽  
pp. 613-620 ◽  
Author(s):  
Masahiro Yamamoto ◽  
Hitoshi Kodamatani ◽  
Yuriko Kono ◽  
Akinori Takeuchi ◽  
Ken Takai ◽  
...  
Keyword(s):  
Deep Sea ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Anodic Stripping ◽  
Mercury Sensor

scholarly journals THE USE OF NANOSCALE ZINC OXIDE IN WOOD-BASED COMPOSITIONS

2021 ◽  
Author(s):  
S. Neminushchaya ◽  
E. Tomina ◽  
A. Dmitrenkov
Keyword(s):  
Zinc Oxide ◽  
Vegetable Oil ◽  
Zinc Oxide Nanoparticles ◽  
Sol Gel ◽  
Environmental Safety ◽  
Oxide Nanoparticles ◽  
Natural Wood ◽  
Oxide Particles ◽  
Used Vegetable Oil ◽  
20 Nm

The aim of this work was to study compositions based on vegetable oil waste and nanoscale zinc oxide particles for processing natural wood. The sol-gel method was used for the synthesis of zinc oxide nanoparticles. The synthesized zinc oxide nanoparticles did not contain impurities and had a shape close to spherical, and their size did not exceed 20 nm. We used freshly prepared suspensions of zinc oxide nanoparticles in used vegetable oil with their content in the amount of 0.1, 0.5 and 1.0 wt. parts per 100 parts of oil. The wood was treated by hot-cold impregnation. The tests were carried out on samples of birch and pine wood of standard sizes. In the modified samples, the wetting angle, moisture and water absorption, as well as their swelling were determined. It is shown that the use of zinc oxide nanoparticles in compositions based on vegetable oil waste can significantly reduce the moisture and water resistance of wood and reduce its swelling. The optimal dosages of the nanopowder introduced into the used vegetable oil and the conditions of impregnation were selected. The compositions used on the basis of vegetable oil waste are characterized by environmental safety, and the resulting wood samples had an improved appearance.

Immunosensing of NT‐proBNP via Cu 2+ ‐based MOFs Biolabeling and in situ Microliter‐droplet Anodic Stripping Voltammetry

2020 ◽  
Vol 32 (8) ◽  
pp. 1754-1762
Author(s):  
Huan Liu ◽  
Yingying Chen ◽  
Yan Cheng ◽  
Qingji Xie ◽  
Rushi Liu ◽  
...  
Keyword(s):  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Anodic Stripping

Zinc oxide nanoparticles with surface modified by degradation of capping polymers in situ during microwave synthesis

2015 ◽  
Vol 26 (4) ◽  
pp. 1064-1071 ◽  
Author(s):  
Jakub Sedlák ◽  
Ivo Kuřitka ◽  
Michal Machovský ◽  
Pavol Šuly ◽  
Pavel Bažant ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Microwave Synthesis ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Surface Modified

Determination of manganese and zinc in coastal waters by anodic stripping voltammetry with a vibrating gold microwire electrode

2011 ◽  
Vol 8 (5) ◽  
pp. 475 ◽  
Author(s):  
Kristoff Gibbon-Walsh ◽  
Pascal Salaün ◽  
Constant M. G. van den Berg
Keyword(s):  
Coastal Waters ◽  
Anodic Stripping Voltammetry ◽  
Mercury Electrode ◽  
Stripping Voltammetry ◽  
Ease Of Use ◽  
In Situ Monitoring ◽  
Irish Sea ◽  
Oxidation Potentials ◽  
Anodic Stripping

Environmental contextMetals in the marine environment play a role in biological processes but can also be toxic. An electrochemical method with a simple microwire electrode is presented that facilitates detection of zinc and manganese in coastal waters. The method is very sensitive and will likely lead to the development of an in-situ monitoring apparatus. AbstractA vibrating, gold, microwire electrode (VGME) is used here to detect low nanomolar levels of dissolved Mn by anodic stripping chronopotentiometry (ASC) and sub-nanomolar levels of dissolved Zn by anodic stripping voltammetry (ASV) in seawater. Mn is detected using a deposition potential (Edep) of –1.35 V, and Zn using Edep = –0.9 V, at pH 8. The method is an example of under-potential deposition (UPD), with positive shifts of the metal oxidation potentials of 0.4–0.6 V compared to the mercury electrode. The limits of detection for Mn (1.4 nM) and for Zn (0.3 nM) in seawater with a 300-s plating time, are better than achieved using other non-mercury based electrodes and nearly as good as a mercury film electrode for Zn. The detection of sub-nanomolar Mn is subject to an unusual interference by arsenate, which lowers the sensitivity when the deposition time is extended beyond 300 s. The VGME has advantages related to robustness, stability and ease of use (no polishing, simple regeneration) facilitating on-site and in-situ use. Zn and Mn are readily measured in seawater of natural pH without the need for reagents, facilitating use of this method in a system for in-situ monitoring. The methods are applied here to coastal seawater (Liverpool Bay, Irish Sea) and can be used for freshwaters such as river water.

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