A highly selective nitrate electrode based on a tetramethyl cyclotetra-decanato-nickel(II) complex

Ardakani, Mohammad Mazloum

doi:10.1016/s0022-0728(03)00719-8

Cited by 4 publications

(4 citation statements)

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“…Keeping in mind that a PVC-membrane electrode which uses exactly the same ionophore (tetraoctylammonium nitrate) [26], presents worse selectivity coefficients than the ISEs based on a SPEEK polymeric matrix, it is reasonable to think that in future research works it may be possible to reach even better results if we use other more selective ionophores (such as those found in the literature [29,30]). …”

Section: Selectivity Of the Electrodementioning

confidence: 99%

Sulfonated poly(ether ether ketone), an ion conducting polymer, as alternative polymeric membrane for the construction of anion-selective electrodes

González-Bellavista

Macanás

Muñoz

et al. 2007

Sensors and Actuators B: Chemical

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Section: Selectivity Of the Electrodementioning

confidence: 99%

Sulfonated poly(ether ether ketone), an ion conducting polymer, as alternative polymeric membrane for the construction of anion-selective electrodes

González-Bellavista

Macanás

Muñoz

et al. 2007

Sensors and Actuators B: Chemical

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“…For the nitrate sensor, the ionophore consisted of tetramethyl cyclotetra-decanato-nickel(II) complex (NiTMTAA), and the ionic site consisted of trioctylmethylammonium chloride (TOMAC, from Aldrich). Both of these have been chosen according to the reversibility, selectivity (>4

, where A − stands for NO 2 − , HPO 4 2− , SO 4 2− , or Cl − ) and efficiency reported in previous potentiometric studies [ 24 , 25 ]. All chemicals, except the synthetized ionophore, were reagent grade and used without further purification.…”

Section: Methodsmentioning

confidence: 99%

Practical Application of Electrochemical Nitrate Sensor under Laboratory and Forest Nursery Conditions

Caron

Lamhamedi

Viens

et al. 2016

Sensors

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The reduction of nitrate leaching to ensure greater protection of groundwater quality has become a global issue. The development of new technologies for more accurate dosing of nitrates helps optimize fertilization programs. This paper presents the practical application of a newly developed electrochemical sensor designed for in situ quantification of nitrate. To our knowledge, this paper is the first to report the use of electrochemical impedance to determine nitrate concentrations in growing media under forest nursery conditions. Using impedance measurements, the sensor has been tested in laboratory and compared to colorimetric measurements of the nitrate. The developed sensor has been used in water-saturated growing medium and showed good correlation to certified methods, even in samples obtained over a multi-ion fertilisation season. A linear and significant relationship was observed between the resistance and the concentration of nitrates (R2 = 0.972), for a range of concentrations of nitrates. We also observed stability of the sensor after exposure of one month to the real environmental conditions of the forest nursery.

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“…For the nitrate sensor, the ionophore consisted of tetramethyl cyclotetra-decanato-nickel(II) complex (NiTMTAA), and the ionic site consisted of trioctylmethylammonium chloride (TOMAC—from Aldrich). Both of these have been chosen according to the reversibility, selectivity (>4

, where A − stands for NO 2 − , HPO 4 2− , SO 4 2− , or Cl − ) and efficiency reported in previous potentiometric studies [ 17 ]. All chemicals, except the synthetized ionophore, were reagent grade and used without further purification.…”

Section: Chemistry Of the Eis Sensormentioning

confidence: 99%

Electrochemical Impedance Sensors for Monitoring Trace Amounts of NO3 in Selected Growing Media

Ghaffari

Caron

Loubier

et al. 2015

Sensors

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With the advent of smart cities and big data, precision agriculture allows the feeding of sensor data into online databases for continuous crop monitoring, production optimization, and data storage. This paper describes a low-cost, compact, and scalable nitrate sensor based on electrochemical impedance spectroscopy for monitoring trace amounts of NO3− in selected growing media. The nitrate sensor can be integrated to conventional microelectronics to perform online nitrate sensing continuously over a wide concentration range from 0.1 ppm to 100 ppm, with a response time of about 1 min, and feed data into a database for storage and analysis. The paper describes the structural design, the Nyquist impedance response, the measurement sensitivity and accuracy, and the field testing of the nitrate sensor performed within tree nursery settings under ISO/IEC 17025 certifications.

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A highly selective nitrate electrode based on a tetramethyl cyclotetra-decanato-nickel(II) complex

Cited by 4 publications

References 0 publications

Sulfonated poly(ether ether ketone), an ion conducting polymer, as alternative polymeric membrane for the construction of anion-selective electrodes

Sulfonated poly(ether ether ketone), an ion conducting polymer, as alternative polymeric membrane for the construction of anion-selective electrodes

Practical Application of Electrochemical Nitrate Sensor under Laboratory and Forest Nursery Conditions

Electrochemical Impedance Sensors for Monitoring Trace Amounts of NO3 in Selected Growing Media

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