Determination of 2,4,6-Trinitrophenol by Differential Pulse Voltammetry at a Bismuth Bulk Working Electrode

Abstract

A new method for differential pulse voltammetric determination of the priority pollutant 2,4,6-trinitrophenol (picric acid) on a bismuth bulk electrode using evaluation of the signal based on polynomial baseline fitting and subtraction is reported. Linear calibration curves were obtained in an acetate buffer (pH 4.0) solution from 2 × 10 −6 to 1 × 10 −4 mol L −1 of 2,4,6-trinitrophenol, with limits of detection and quantification of 2.0 × 10 −7 mol L −1 and 6.7 × 10 −7 mol L −1 , respectively. The newly developed method was tested on real sample matrices of drinking and river water.

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

“…Although the L Q s obtained at the m‐AgSAE for 4‐NI were slightly higher than in a previous voltammetric study on a hanging mercury drop minielectrode ( L Q s of 0.15 μmol L −1 and 0.27 μmol L −1 for authentic samples of drinking and river water, respectively) [50], the m‐AgSAE appears to be a more stable and robust electrode, particularly suitable for measurements in flow‐through systems. This potential application is related to the fact that most nitrated aromatic hydrocarbons (both monocyclic and polycyclic) cannot be determined in a mixture with the use of voltammetric techniques alone [56]. For the successful determination of nitrated aromatic hydrocarbons in a mixture, a pre‐separation step must be used, as shown, for example, in the HPLC study [15], where the m‐AgSAE was also used as a working electrode in the presented electrochemical detector.…”

PEI functionalized NaCeF4:Tb3+/Eu3+ for photoluminescence sensing of heavy metal ions and explosive aromatic nitro compounds

“…As shown in Tables 1 and 2, the corresponding View Article Online K SV and LOD of PA and Fe is higher than those of some previously reported. [67][68][69][70][71][72][73][74][75][76] Quenching mechanism of metal ions and nitro-aromatic analytes…”

Differential Pulse Voltammetric Determination of 2‐Methyl‐4,6‐Dinitrophenol using Bismuth Bulk Electrode

“…Their biggest disadvantages are connected with the possibility of their oxidation by atmospheric oxygen, their limited potential window in comparison with mercury electrodes, limited pH range in which they can be applied, and sometimes problems with passivation common to most solid electrodes . However, these drawbacks do not prevent the application of BiBE for easily reducible organic nitro compounds . MDNP has been already determined in our laboratory at a silver solid amalgam electrode (AgSAE) and at a dropping mercury electrode (DME) .…”