Voltammetric Determination of Dinitronaphthalenes Using a Silver Solid Amalgam Paste Electrode

Abstract

Experimental Reagents and chemicalsA silver solid amalgam was prepared by mixing of mercury (99.999%, Polarografie Praha, Czech Republic) and silver powder (2 -3.5 μm, 99.9%, Sigma-Aldrich, Germany) in a weight ratio (60:40, wHg/wAg) by 1 min shaking on a Vortex Genie 2 (Scientific Industries, USA) in a 2-ml Eppendorf tube. The thus-prepared solid amalgam was then immediately pulverized to a rough powder in an agate mortar, and left to harden overnight. Afterwards, the rough amalgam powder was pulverized to a fine amalgam powder in the same agate mortar.

The Use of Silver Solid Amalgam Electrodes for Voltammetric and Amperometric Determination of Nitrated Polyaromatic Compounds Used as Markers of Incomplete Combustion

“…Our research is now focused on increasing S / N ratio and development of new designs of amperometric detectors using amalgam paste [ 50 – 52 ] or single crystal amalgam electrodes [ 53 , 54 ].…”

Voltammetric determination of genotoxic 4‐nitroindane at a mercury meniscus modified silver solid amalgam electrode

“…Although the use of liquid mercury in electroanalytical techniques, such as polarography [1][2][3][4] and voltammetry [5][6][7], has a justified tradition, the fear of mercury toxicity and related diseases [8] has led to the search for new electrode materials [9]. Conventional types of electrodes, such as a dropping mercury electrode and a hanging mercury drop electrode, can be successfully substituted by electrodes containing small amounts of liquid mercury or non-toxic mercury amalgams [10,11] (e. g., polished [12][13][14], mercury meniscus modified [12,13,15,16], mercury film modified [12,17], bismuth film modified [18,19], or carbon film modified silver solid amalgam electrodes [20][21][22], silver solid amalgam paste electrodes with an organic pasting liquid [23,24], silver amalgam paste electrodes [25,26], polished silver solid amalgam composite electrodes [27,28], single crystal amalgam electrodes [29,30], or renewable silver amalgam film electrodes [31,32]). Novel silver amalgambased electrode materials combine unrivalled properties of mercury electrodes (broad cathodic potential window and relatively high sensitivity [33][34][35]) with requirements of Green Analytical Chemistry (GAC) (non-toxicity and environmental friendliness [36]).…”