Pulsating potentiometric titration technique for assay of dissolved oxygen in water at trace level

Sahoo, Prativa; Ananthanarayanan, R.; Malathi, N.; Rajiniganth, M. P.; Muthialu, Nagarajan; Swaminathan, P.

doi:10.1016/j.aca.2010.04.040

Cited by 25 publications

(6 citation statements)

References 10 publications

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“…Furthermore, the steps are time consuming, and the system is bulky. Therefore, real-time monitoring is not possible [18,19]. Electrochemical measurements are a commonly used method and include potentiometric methods [20,21] and amperometric methods [22].…”

Section: Introductionmentioning

confidence: 99%

Research on a Miniature Multiparameter Water Quality Sensor Chip and a System with a Temperature Compensation Function

2020

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This paper presents a multiparameter water quality sensor chip with temperature compensation. The sensor chip was manufactured using microelectromechanical system (MEMS) technology. The surface of the chip integrated pH, dissolved oxygen (DO), ammonia nitrogen, and temperature sensors. To compensate for the solution temperature, the chip was also designed with a sandwich, plate-type serpentine Pt resistance heater. The experimental results showed that the pH sensor had a high sensitivity of 0.288 mA/pH with good linearity ( R 2 = 0.9998 ), the sensitivity of the temperature sensor was 0.949 Ω/°C, the sensitivity of the ammonia nitrogen sensor was 0.1139 mA/ppm, the sensitivity of the dissolved oxygen (DO) sensor was 2.22 μA/ppm, and the sensitivity of the temperature changes with respect to the heater power was 0.3126°C/mW. Compared with a single water quality parameter sensor, the as-prepared sensor chip could simultaneously detect multiple parameters of a water sample and had a good temperature compensation effect. Moreover, the sensor chip was small in size, rugged, and highly accurate.

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Section: Introductionmentioning

confidence: 99%

Research on a Miniature Multiparameter Water Quality Sensor Chip and a System with a Temperature Compensation Function

2020

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“…The reliable determination of dissolved oxygen in aqueous solution is of great importance in various applications such as environmental and industrial analysis [1]. Moreover, biochemical pathways in living cells involve the consumption of dissolved oxygen from the environment.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a Needle Microsensor and Its Applications in the Detection of Dissolved Oxygen

et al. 2015

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A novel needle microsensor measurement system was fabricated and applied to determine the concentration of dissolved oxygen. Platinum nanoparticles were employed to modify the surface of copper-core electrode in order to improve electrochemical response signal. The homemade electrode displayed efficient electrocatalytic reduction activity towards dissolved oxygen. The sensor responded linearly to dissolved oxygen in the range of 10 μM to 0.195 mM and had a remarkable sensitivity of 9.02 μA/mM. In addition, it showed an excellent reproducibility, stability, and selectivity. These results indicated that the needle microsensor when used, could yield good performance. Moreover, it is believed to be a potential tool for studying specific substances at a cellular level orin vivoin future.

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“…In the present work, we introduced a new measurement approach to monitor real‐time shift in digital pulse frequency, a linear function of chemical emf (electromotive force), during the oscillating reaction using a new class of an in‐house–built pulsating sensor. The pulsating sensors of four different categories indigenously developed in this laboratory (IIS) have been successfully used in many physico‐chemical applications in a much simpler way 22–34. Hence in this work, we reported the use of one category of such sensor for high‐precision and high‐resolution online measurement of emf to study a well‐known halogen‐free OCR (Cu(II)‐catalyzed H 2 O 2 –KSCN–NaOH reaction).…”

Section: Introductionmentioning

confidence: 99%

Studies on oscillating chemical reaction in Cu(II)‐catalyzed thiocyanate–hydrogen peroxide–NaOH system using pulsating sensor

Das

Sahoo

Muthialu

2012

Int J of Chemical Kinetics

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We present a novel measurement technique to study an oscillating chemical reaction using a new class of sensor, viz. a pulsating sensor developed in-house. A halogen-free oscillating chemical reaction in the Cu(II)-catalyzed H 2 O 2 -KSCN-NaOH system reported by Orban was chosen to examine the performance of this technique. Shift in potential during the oscillating reaction was captured online with high precision and excellent resolution using this simple but high-performance pulsating potentiometric measurement technique. In this work, the influence of bath temperature and flow rate of reagents on the Cu(II)-catalyzed H 2 O 2 -KSCN-NaOH oscillating chemical reaction is investigated to optimize the conditions for rapid oscillations. This, in turn, helps to evolve analyte pulse perturbation techniques for rapid assay of hydrazine, uranium(VI), and sodium thiosulfate in aqueous solutions using the above oscillating reaction. C

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Pulsating potentiometric titration technique for assay of dissolved oxygen in water at trace level

Cited by 25 publications

References 10 publications

Research on a Miniature Multiparameter Water Quality Sensor Chip and a System with a Temperature Compensation Function

Research on a Miniature Multiparameter Water Quality Sensor Chip and a System with a Temperature Compensation Function

Fabrication of a Needle Microsensor and Its Applications in the Detection of Dissolved Oxygen

Studies on oscillating chemical reaction in Cu(II)‐catalyzed thiocyanate–hydrogen peroxide–NaOH system using pulsating sensor

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