Highly sensitive electrochemical detection of iodate based on glassy carbon electrode modified with iridium oxide

Ruthenium Oxide Hexacyanoferrate as an Effective Electrode Modifier for Amperometric Detection of Iodate and Hydrogen Peroxide

“…AgNPs/PGS/GC 49 -1.25 b 6.7 250 i 1.0 × 10 -4 -8.0 × 10 -4 5.0 × 10 -5 OMC/AgNPs/GC 50 -0.65 b 3.0 1.92 h 1.5 × 10 -5 -4.43 × 10 -3 3.01 × 10 -6 FAD-SiO 2 /ZrO 2 /C 51 -0.41 b 4.0 -4.9 × 10 -5 -2.4 × 10 -3 1.46 × 10 -6 WO 3 /PANI/C cloth 52 -0.25 b -0.541 d 1.0 × 10 -5 -5.0 × 10 -4 2.7 × 10 -6 IrO x /GC 23 -0.2 a 1.0 739.7 g 1.0 × 10 -6 -4.6 × 10 -3 5.0 × 10 -7 MWCNT@RB/GE 53 -0.1 a 2.0 0.77 e 2.5 × 10 -5 -7.5 × 2.0 × 10 -5 -2.0 × 10 -3 1.5 × 10 -5 RuOHCF/GC This work 0.0 a 1.0 1050.8 g 5.0 × 10 -6 -3.2 × 10 -3 1.0 × 10 -6 RuONPs/GC 55 0.078 b 3.0 0.01 d 1.5 × 10 -6 -5.2 × 10 -4 9.0 × 10 -7 AuNPs/PEI/CNTs-COOH/ORC/Au 56 0.15 a 2.0 -1.0 × 10 -6 -2.0 × 10 -3 1.7 × 10 -7 V-Schiff base complex/MWCNT/GC 57 0.3 a 2.0 23.4 c 5.0 × 10 -7 -5.0 × 10 -4 3.5 × 10 -7 RuOHCF/GC This work 0.45 a 1.0 634.0 g 8.0 × 10 -6 -6.0 × 10 -3 392.5 g 6.0 × 10 -3 -9.5 × 10 -3 1.0 × 10 -6 IrO x /GC 48 0.7 a 1.0 140.9 c 1.0 × 10 -7 -3.5 × 10 -5 5.0 × 10 -9 tical applications. The storage stability of the here presented electrode was tested -the current response toward 0.1 mM iodate at an applied potential of -0.1 V was measured every day.…”

“…5,8,10 The performance of the as-prepared catalyst was compared with other sensors, as it shown in Table 3. 23,[48][49][50][51][52][53][54][55][56][57] The sensor systems were arranged in order of increasing the working potential. Clearly, the detection limit of some sensors is better than our results.…”

“…Therefore, to ensure that the correct amounts of iodate are added in table salt, the sensitive and rapid quantitative determination is of great importance to preventing thyroid diseases. 22,23 Several analytical techniques, such as spectrophotometry, 24 flame atomic absorption spectrometry (FAAS), 25 chemiluminescence 26 and gas chromatography-mass spectrometry 27 have been used for iodate sensing. However, most of these methods are not suitable for routine analysis as they required expensive equipment and some of them are based on indirect reactions where species with appropriate characteristics have to be produced for quantitative detection of the target analyte.…”

An Electrochemical Sensing Platform Based on Iridium Oxide for Highly Sensitive and Selective Detection of Nitrite and Ascorbic Acid

“…The electrodeposition of IrO x onto the GC electrode was carry out in two-step procedure as follows: deposition of iridium from 2.0 % Na 2 IrCl 6 in 0.1 M HCl solution using CV from -0.3 to 0.3 V applying 100 cycles at scan rate of 100 mV s -1 and subsequent oxidation of iridium applying 100 cycles from -0.3 to 1.4 V in electrolyte 0.5 M H 2 SO 4 . 55…”

“…31 Because of the high electron transfer rate constant of Ir(IV)/Ir(III) redox couple, IrO x were used as an electron transfer mediator and successfully applied in electrocatalysis. [52][53][54][55] The present research reports an amperometric sensor for nitrite and AA detection, based on modified with iridium oxide GC electrode. As an electrode material, GC is distinguished by its chemical inertness, low background currents, wide potential window and low price.…”