Development of miniature all-solid-state potentiometric sensing system

Anastasova-Ivanova, Salzitsa; Mattinen, Ulriika; Radu, Aleksandar; Bobacka, Johan; Lewenstam, Andrzej; Migdalski, Jan; Danielewski, Marek; Diamond, Dermot

doi:10.1016/j.snb.2010.02.044

Cited by 84 publications

(58 citation statements)

References 36 publications

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“…Through the reduction in size of both the functionally critical components of sensing devices and the sensors themselves, miniaturisation offers a range of distinct advantages to the analyst, including the reduction of: This coupled with improved portability has resulted in miniaturisation becoming a major driving force in sensor research, prompting not only the scaling down of established sensing devices [78], but also the development and application of novel sensing materials [79,80] in a variety of sensors. At present the majority of electrochemical sensor development is application orientated which has resulted in the extreme miniaturisation of sensing devices.…”

Section: Miniaturisationmentioning

confidence: 99%

Electroanalytical Sensor Technology

Power¹,

Morrin²

2013

Electrochemistry

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Section: Miniaturisationmentioning

confidence: 99%

Electroanalytical Sensor Technology

Power¹,

Morrin²

2013

Electrochemistry

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“…Redistribution subject to ECS license or copyright; see 124. 16.171.33 Downloaded on 2013-07-25 to IP measurements using the separate solution method (SSM), 27 the electrodes were conditioned in 1.0 × 10 −3 M NaNO 3 for 1 day.…”

Section: Preparation Of Single-piece Solid-contact Agmentioning

confidence: 99%

Single-Piece Solid-Contact Polymeric Membrane Ion-Selective Electrodes for Silver Ion

Yin

Liu

Qin

2013

J. Electrochem. Soc.

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Single-piece solid-contact polymeric membrane Ag + ion-selective electrodes (ISEs) have been fabricated based on conducting polymer poly(3-octylthiophene) (POT) dissolved into the Ag + ion-selective membrane. The effects of the amounts of POT on the potential responses of the single-piece solid-contact Ag + -ISEs were investigated in detail. Results indicate that the single-piece solid-contact Ag + -ISE with 10 wt% POT displays excellent reproducibility and stability of the potential response. The linear range of 3.0 × 10 −8 −3.0 × 10 −5 M can be obtained in AgNO 3 solution with the slope 56.84 ± 0.92 mV/dec (n = 3, R = 0.9984) and the detection limit is 1.90 × 10 −8 M. In addition, the single-piece solid-contact Ag + -ISE with 10 wt% POT shows excellent selectivity, stable potential response over a pH range of 3.5 to 6.0 and no significant redox sensitivity. The proposed electrode with 10 wt% POT has been successfully applied to potentiometric titration of chloride ion and determination of Ag + ion concentrations in spiked waters with high accuracy and good reliability. Silver is well known for its excellent antimicrobial property. It has been widely used in medicine, photography and production of ornaments. However, its potential damage to the environment has been easily neglected, although it is not as toxic to humans as other heavy metals. It has been reported that silver salts or silver nanoparticles show unacceptable toxic effects to the environment and human health.1 The U.S. Environmental Protection Agency reported that the amount of Ag + ion higher than 1.6 nM in water is toxic to fish and microorganisms 2 and the maximum contaminant level of total silver in drinking water is limited to 0.9 μM.3 Therefore, it is necessary to detect Ag + ion using efficient analytical methods. Potentiometry with ion-selective electrodes (ISEs) is a promising method for directly determining various ions in clinical, environmental and industrial analysis, owning to their attractive features including simple design, small size, low energy consumption and low cost. Solid-contact ion-selective electrodes (ISEs) have recently attracted considerable attentions for simple fabrication, easy miniaturization and less maintenance, compared to the traditional polymeric membrane ISEs with inner filling solutions. 4 Moreover, solid-contact ISEs can place in any position or configuration without the risk of leakage of the inner solution. However, the coated-wire electrodes (CWEs), 5 as the initial solid-contact ISEs, suffer from the poor potential stability resulting from the blocked interface between the electronic conductor and the ion-selective membrane (ISM). 6 Various materials have been used as solid-contact transducers to improve potential stability of solid-contact ISEs, including hydrogels, 7 redox-active self-assembles monolayers, 8 three-dimensionally ordered macroporous carbon, 9 carbon nanotubes, 10 fullerene, 11 graphene, 12 gold nanoparticles 13 and conducting polymers.14-16 Among these materials, the conducting polymer p...

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“…More recently, all solid state ISEs have been developed, which require no filling solution and as such are more robust. Solid state sensors are also compact -they can be any size as determined by the electrode area, making them ideal for field analysis applications [7][8][9].…”

Section: Introductionmentioning

confidence: 99%