Chemoresistor for determination of mercury vapor

  • This chapter presents a procedure to prepare and calibrate chemical sensor for mercury vapor and discusses application of the sensor for measurements of mercury vapor. The sensor is based on high affinity of gold to mercury and on chemoresistive properties of ultrathin gold layers: adsorption of mercury leads to increase in the surface resistance. However, this effect is not selective: similar changes are caused by adsorption of water vapor and sulfuric compounds. The use of monomolecular layer of alkylthiols as a filter excludes this interference completely. Sensor calibration is performed by thermoinjection of nanogram-amount of mercury quantitatively deposited by electrochemical reduction. It is found that the sensors display no sensitivity to such typical interferents of mercury chemoresistors based on uncoated gold as volatile thiols and water. Preliminary data demonstrate a possibility to measure Hg(0) even in aqueous solutions.

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Metadaten
Author: Majlinda Vasjari, Vladimir M. MirskyORCiDGND
DOI:https://doi.org/10.1016/S0166-526X(06)49058-9
ISBN:978-0-444-53053-0
Title of the source (English):Electrochemical Sensor Analysis
Publisher:Elsevier
Place of publication:Amsterdam
Editor: Salvador Alegret, Arben Merkoci
Document Type:Part of a book (chapter)
Language:English
Year of publication:2007
First Page:105
Last Page:109
Series ; volume number:Comprehensive Analytical Chemistry ; 49
Faculty/Chair:Fakultät 2 Umwelt und Naturwissenschaften / FG Nanobiotechnologie
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