Ion-Selective Electrode for Anionic Surfactants Using Hexadecyl Trimethyl Ammonium Bromide-Sodium Dodecylsulfate as an Active Ionophore

Wang, Junwei; Du, Zhongjie; Wang, Wanxu; Xue, Wenjing

doi:10.4061/2011/958647

Cited by 6 publications

(2 citation statements)

References 24 publications

(27 reference statements)

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“…The dodecyl sulfate (DS − ) ion-selective electrode was fabricated using two commercially available Orion 900200 Sure-Flow Reference Half-Cell Ag/AgCl double junction electrodes and implemented with an Orion Star A329 potentiometer, as described in Supporting Information, Section I. Selectivity for DS − ion was based on a membrane prepared by adapting the procedure suggested by Wang and co-workers. 58 The electrode setup was used to obtain the concentration of free, uncomplexed DS − in solutions containing 10 000 ppm P123. All electrode measurements were conducted at 22 ± 2 °C.…”

Section: ■ Methodsmentioning

confidence: 99%

Depletion Forces Induced by Mixed Micelles of Nonionic Block Copolymers and Anionic Surfactants

Lele

Tilton

2020

Langmuir

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Depletion forces were measured between a silica sphere and a silica plate in solutions containing nonionic Pluronic P123 poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) triblock copolymers and anionic sodium dodecyl sulfate (SDS) surfactants using colloidal probe atomic force microscopy. Prior research established synergistic depletion force enhancement in solutions containing SDS and unimeric Pluronic F108 block copolymers via formation of large pseudo-polyelectrolyte complexes. The current work addresses a more complex system where the polymer is above its critical micelle concentration, and surfactant binding alters not only the size and charge of the micelles but also the number of polymers per micelle. Force profiles were measured in 10 000 ppm P123 (1 wt %, corresponding to 1.72 mM based on average molar mass) solutions containing SDS at concentrations up to 64 mM and compared to micellar P123 solutions and to P123-free SDS solutions. Whereas force profiles in the SDS-free micellar P123 solutions were purely repulsive, P123/SDS complexation produced synergistic depletion force enhancement for SDS concentrations between 2 and 32 mM. The synergism that occurred within a finite SDS concentration range was explained by comparing the hydrodynamic size, molar mass, charge, and concentration of depletants in P123/SDS mixtures and their respective single-component solutions obtained with the aid of dynamic light scattering, static light scattering, and dodecyl sulfate ion-selective electrode measurements. These measurements showed that complexation produced effects that would be mutually counteracting with respect to depletion forces: decreasing the mixed micelle hydrodynamic diameter relative to SDS-free P123 micelles would tend to weaken depletion forces, while adding charge and decreasing the aggregation number of polymers per micelle (thereby increasing the number concentration of micellar depletants) would tend to strengthen depletion forces.

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Section: ■ Methodsmentioning

confidence: 99%

Depletion Forces Induced by Mixed Micelles of Nonionic Block Copolymers and Anionic Surfactants

Lele

Tilton

2020

Langmuir

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“…An amperometric sensor has been fabricated which employed surfactant-degrading microorganisms [7]. Several potentiometric sensors had been developed employing ionselective PVC membranes [8][9][10][11] and conducting polymers [12,13].…”

Section: Introductionmentioning

confidence: 99%

Molecularly imprinted potentiometric sensor for surfactant based on electrosynthesized polyaniline

Biñas¹,

Sevilla²

2014

actamanil

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A potentiometric sensor for sodium dodecylsulfate (SDS) was developed based on molecularly-imprinted polyaniline. The molecularly-imprinted polymer was synthesized through a potentiostatic electropolymerization of aniline monomer in the presence of the template SDS molecule at a constant potential of 0.8 V. The polymerization parameters determined the analytical performance of the polyaniline reagent phase. The optimized electropolymerization process provided a sensor with sensitivity of 45.546 mV/decade, working concentration range of 310 -6 M to 110 -2 M SDS, correlation coefficient (r 2 ) of 0.993 and with a limit of detection 110 -5 M DS -. The sensor response is reproducible with a mean RSD of 8.08% from 310 -6 M to 310 -3 M SDS. Selectivity studies using the fixed primary ion method proved the higher selectivity of the synthesized polymer for SDS over inorganic salts and fatty acid salts.

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Calcium ion-selective electrode based on the facile synthesis of CuO over Cu wires

Al-Hardan

Hamid

Firdaus-Raih

et al. 2021

J Mater Sci: Mater Electron

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Ion-Selective Electrode for Anionic Surfactants Using Hexadecyl Trimethyl Ammonium Bromide-Sodium Dodecylsulfate as an Active Ionophore

Cited by 6 publications

References 24 publications

Depletion Forces Induced by Mixed Micelles of Nonionic Block Copolymers and Anionic Surfactants

Depletion Forces Induced by Mixed Micelles of Nonionic Block Copolymers and Anionic Surfactants

Molecularly imprinted potentiometric sensor for surfactant based on electrosynthesized polyaniline

Calcium ion-selective electrode based on the facile synthesis of CuO over Cu wires

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