TY - JOUR
T1 - Voltammetric determination of dinitronaphthalenes using a silver solid amalgam paste electrode
AU - Tvrdikova, Jana
AU - Danhel, Ales
AU - Vyskocil, Vlastimil
AU - Barek, Jiri
PY - 2012/1/1
Y1 - 2012/1/1
N2 -
The electrochemical behavior and application of a new sensor, a silver solid amalgam paste electrode (AgSA-PE), based on the mixture of a fine silver solid amalgam powder (60:40 (wH
g
/wA
g
)) and a suitable organic pasting liquid (Paraffin oil) in a ratio of 20:1 (w/w), was investigated in an aqueous-methanolic media (1:1). This alternative working electrode provides simple preparation and handling, adequate mechanical stability, easily renewable electrode surface, sufficiently wide cathodic potential window (up to -1200 mV within a pH range of 2.7 - 12.3), and sufficient sensitivity without any necessary pretreatment. The practical usability of the AgSA-PE was verified by the development of voltammetric methods for the determination of selected environmentally important pollutants (1,3-, 1,5-, and 1,8-dinitronaphthalenes) in an aqueous-methanolic media (1:1). The differential pulse voltammetric methods at AgSA-PE give linear concentration dependences in the range of 1 - 100 μmol l-1 with limits of detection of about 1 μmol l-1 in a mixture of Britton-Robinson buffer of appropriate pH and methanol (1:1).
AB -
The electrochemical behavior and application of a new sensor, a silver solid amalgam paste electrode (AgSA-PE), based on the mixture of a fine silver solid amalgam powder (60:40 (wH
g
/wA
g
)) and a suitable organic pasting liquid (Paraffin oil) in a ratio of 20:1 (w/w), was investigated in an aqueous-methanolic media (1:1). This alternative working electrode provides simple preparation and handling, adequate mechanical stability, easily renewable electrode surface, sufficiently wide cathodic potential window (up to -1200 mV within a pH range of 2.7 - 12.3), and sufficient sensitivity without any necessary pretreatment. The practical usability of the AgSA-PE was verified by the development of voltammetric methods for the determination of selected environmentally important pollutants (1,3-, 1,5-, and 1,8-dinitronaphthalenes) in an aqueous-methanolic media (1:1). The differential pulse voltammetric methods at AgSA-PE give linear concentration dependences in the range of 1 - 100 μmol l-1 with limits of detection of about 1 μmol l-1 in a mixture of Britton-Robinson buffer of appropriate pH and methanol (1:1).
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U2 - 10.2116/analsci.28.411
DO - 10.2116/analsci.28.411
M3 - Article
AN - SCOPUS:84862250495
VL - 28
SP - 411
EP - 416
JO - Analytical Sciences
JF - Analytical Sciences
SN - 0910-6340
IS - 4
ER -