Simultaneous quantification of Cd(II) and Pb(II) by bismuth/poly(bromocresol purple) modified screen-printed carbon-electrode in wastewater

Simultaneous Measurements of Nanotrace Amounts of Lead and Cadmium Using an Environmentally Friendly Sensor (An Activated Glassy Carbon Electrode Modified with a Bismuth Film)

“…Previous methods described in the literature give results comparable to those obtained in this work ( Table 1 ) [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. This raises the question of where the novelty of this paper lies.…”

“…As shown in Figure 7 B,D,F, the obtained linearity of the calibration curves was very good and extended up to 100 nM for Cd(II) and 200 nM for Pb(II), with the low limits of detection (LOD) and quantification (LOQ) of 0.62 and 0.18 nM, and 2.07 and 0.60 nM, respectively [ 30 ]. Table 1 compares the developed procedure for the determination of Cd(II) and Pb(II) using the aGCE/BiF with others described in the literature [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. Without any doubt, it can be stated that the developed procedure offers wide linear ranges of calibration curves and one of the lowest detection and quantification limits for Cd(II) and Pb(II) compared to those described in the literature.…”

“…It is also worth mentioning that by using special chemical sensors, e.g., screen-printed electrodes (SPEs), you can further miniaturize the equipment and perform field analyses. Recently, there has been a tendency to use sensors whose surface has previously been modified [ 10 , 11 , 12 , 13 , 14 , 15 ]. This can be achieved by electrochemical deposition of a metal film, e.g., bismuth film (BiF) [ 11 ], or surfactant film such as sodium dodecylsulphate (SDS) [ 16 ], deposition of nanoparticles such as silver nanoparticles (AgNPs) [ 15 ], or polymerization of a given chemical compound [ 11 ].…”

“…Recently, there has been a tendency to use sensors whose surface has previously been modified [ 10 , 11 , 12 , 13 , 14 , 15 ]. This can be achieved by electrochemical deposition of a metal film, e.g., bismuth film (BiF) [ 11 ], or surfactant film such as sodium dodecylsulphate (SDS) [ 16 ], deposition of nanoparticles such as silver nanoparticles (AgNPs) [ 15 ], or polymerization of a given chemical compound [ 11 ]. Furthermore, an equally common step during sensor pre-preparation is electrochemical activation.…”