Indirect voltammetric detection of fluoride ions in toothpaste on a comb-shaped interdigitated microelectrode array

Indirect Differential Pulse Voltammetric Determination of Fluoride Ions at Carbon Paste Electrode Modified with Porous and Electroactive Fe3+/Fe2+Based-Metal Organic Frameworks Type MIL-101(Fe)

“…In the presence of F − , the redox signals of Fe 3+ /Fe 2+ were decreased, which may be attributed to the complexation between Fe 3+ and F − forming a stable fluoroferric complex. 51 Moreover, the successive CVs of MIL-101(Fe) @CPE were obtained at different scan rates in the range of 30-150 mV s −1 in 0.2 M KCl (pH 7.0) (Fig. 7A).…”

Fluoride in Human Health and Nutrition

“…Use of mass-shift strategy using tandem inductively coupled plasma quadrupole mass spectrometry (ICP−MS−MS) was reported for the determination of fluorine. 161 Less frequently used methods for determination of fluorine include polarography, 162 voltammetry, 163 sensors, 164 capillary zone electrophoresis (CZE), 165 near infrared spectroscopy (NIR), 166 19 F-nuclear magnetic resonance ( 19 F-NMR), 167 neutron activation analysis (NAA) 168 and others.…”

“…The content of Fin tea as determined in our recent study ranged between 0.32 and 3.55 mg/l (average 1.42 mg/l). 163 Figure 7 illustrates average daily intakes of fluoride in adults from food and daily consumption of 1 l of tea. Water with Fconcentration of 1 mg/l was considered for preparing tea infusions in fluoridated areas.…”

Indirect Voltammetric Sensing Platforms For Fluoride Detection on Boron-Doped Diamond Electrode Mediated via [FeF 6 ] 3− and [CeF 6 ] 2− Complexes Formation

“…First, these samples were directly infused into column with DOWEX X-4 in H + cycle, to remove some cations forming a stable complexes with fluoride (as stated in introduction section e.g. Al 3+ ) to eliminate these interferences [48]. Final eluent was transferred into polyethylene flask and was ready for analysis.…”

“…The most known is concept introduced by Frant and Ross [46] based on F À ion selective electrode with LaF 3 membrane used as single or combined electrode where calomel reference electrode is incorporated into outer cover of the electrode mantle. This electrode is simple, reliable and may detect fluoride concentrations around 10 À4 mol L À1 , however it takes relatively long time to reach equilibrium as well as its response is Nernstian (nonlinear) [47,48]. This approach based on static electrochemistry is still actual and being improved further.…”