bullet Sensors & Transducers Journal

    (ISSN 1726- 5479)


2007 e-Impact Factor


25 Top Downloaded Articles

Journal Subscription 2008

Editorial Calendar 2008

Submit an Article

Editorial Board

Current Issue

Sensors and Transducers Journal's cover


Sensors & Transducers Journal 2007

2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

2004 S&T e-Digest Contents

2005 S&T e-Digest Contents

2006 S&T e-Digest Contents


Best Articles 2007




Vol. 88, Issue 2, February 2008, pp.47-58




Glutathione Modified Gold Piezoelectric and Voltammetric Sensors for Determination of Mercury in a Wide Concentration Range


Maria HEPELab*, Julia DALLASa and Mark D. NOBLEc

aDepartment of Chemistry, State University of New York at Potsdam, Potsdam, NY 13676, USA

bDepartment of Chemistry, University of Buffalo, Buffalo, NY 14260, USA

cDepartment of Biomedical Genetics, University of Rochester, Rochester, NY 14642, USA

E-mail: hepelmr@potsdam.edu, www2.potsdam.edu/hepelmr



Received: 19 January 2008   /Accepted: 22 February 2008   /Published: 26 February 2008


Abstract: Glutathione-modified Au electrodes (Au-SG) deposited on a piezoelectric quartz crystal resonators were investigated for sensor applications for mercury(II). Owing to the stable background resulting from well ordered Au-SG self-assembled monolayer film, very small accumulations of mercury could be utilized in Hg(II) determination. Typically, the accumulations ranging from qHg = 0.1 down to 0.0005 ML (equivalent Hg monolayers) could be used. This contributs to the considerable reduction of the analysis time. The lower detection limit of Hg, LDO = 0.3 ppb has been achieved using slow scan stripping voltammetry and was further enhanced using differential pulse technique to 0.05 ppb.  Moreover, the analysis can also be performed in acidic environment where other electrode modifiers become inactive.


Keywords: glutathione SAM, Hg stripping voltammetry, nanogravimetry, adsorptive stripping voltammetry (AdSV), differential pulse (DP) stripping voltammetry,
modified-Au EQCN.


 Acrobat reader logo Click <here> or title of paper to download the full pages article (1.08 M)





1999 - 2008 Copyright , International Frequency Sensor Association (IFSA). All Rights Reserved.

Home - News - Links - Archives - Tools - Standardization - Patents - Marketplace - Projects - Wish List - Subscribe - Search - e-Shop - Membership

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Sensor Jobs - Site Map