To reduce the environmental risks posed by mercury (Hg), a simple and rapid detection system for Hg in the environment is needed. We developed a simple Hg measurement method for detecting of Hg in liquid phase using quartz crystal microbalance (QCM-Hg). Mercury is reduced into Hg0 by adding the reducing solution (SnCl2) to the divalent Hg2+ in the sample solution. Then, Hg is turned into vapor in reactor bottle by flowing air. It (QCM-Hg) utilizes the direct reaction of Hg and the Au electrode of the quartz crystal element via the phenomenon of Au-Hg amalgamation. In the case of 0.0005 mg/L in liquid phase, a frequency shift of about 13 Hz is obtained using a 20 MHz quartz crystal element. This new detection system allows easy measurement of very low concentrations of Hg in liquid phase.
|Translated title of the contribution||Measurement system of mercury in water samples by reduction vaporization method using a quartz crystal microbalance|
|Number of pages||5|
|Journal||IEEJ Transactions on Sensors and Micromachines|
|Publication status||Published - 2021 Feb 1|
ASJC Scopus subject areas
- Mechanical Engineering
- Electrical and Electronic Engineering