Taking advantage of CTAB micelles for the simultaneous electrochemical quantification of diclofenac and acetaminophen in aqueous media

Guzmán-Hernández, Dafne Sarahia; Cid-Cerón, Mireya Marlenne; Romero-Romo, M.; Ramı́rez-Silva, Maria Teresa; Páez-Hernández, María Elena; Corona-Avendaño, S.; Palomar-Pardavé, M.

doi:10.1039/c7ra07269d

Cited by 7 publications

(1 citation statement)

References 46 publications

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“…For all the prepared samples, the polymer and salt concentration was maintained at

1 italicwt %

and

0.1 M

respectively whereas the surfactant concentration was varied from below critical micellar concentration (CMC) to well above CMC. The CMC values of respective surfactants at 20 °C are as follows: SDS ~8 mM, Triton X‐100 ~ 0.22 mM and CTAB ~ 0.9 mM 26–28 . The final solution mixture was then transferred quickly into a mold of

30 mm

diameter and

1 mm

depth and covered at once with a coverslip and was allowed to stand overnight to prepare the gel samples for rheological measurements.…”

Section: Methodsmentioning

confidence: 99%

Surfactant head group and concentration influence on structure and dynamics of gellan gum hydrogels: Crossover from stretched to compressed exponential

Mithra

Jena

2021

Journal of Polymer Science

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In the present study, we have investigated the effects of surfactant addition on the structure and dynamics of gellan gum hydrogels. A strong interaction is seen between gellan gum and oppositely charged cationic surfactant, hexadecyltrimethylammonium bromide (CTAB) whereas rather weak or minimal interactions are observed when either anionic surfactant, sodium dodecylsulfate (SDS), or nonionic surfactant, Triton X‐100 is added to the system. The dynamics of the hydrogels was studied, using dynamic light scattering measurements and the heterodyne method was used for data evaluation. The correlation function of parent hydrogel was fitted with a stretched exponential function, while a single plus stretched exponential function was employed to study the dynamics of hydrogel with surfactants and the corresponding relaxation times were appropriately analyzed. An interesting crossover from stretched to compressed exponential was seen when CTAB was added beyond critical micellar concentration to the system, which was not evidenced for the other two surfactants. Ensemble averaged intensity was also analyzed and the general picture that emerges is that the oppositely charged surfactant has the strongest ability to form large associations as oppose to nonionic and like‐charged surfactants. The rheological measurements were carried out to determine the elastic response of the gels over a wide range of frequencies. It was seen that the elastic modulus was dependent on both the surfactant concentration and type. Cationic surfactant increased the elastic modulus markedly as opposed to the nonionic and anionic surfactants. These results may have implications for the use of polymer surfactant systems as potential products.

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“…For all the prepared samples, the polymer and salt concentration was maintained at

1 italicwt %

and

0.1 M

30 mm

diameter and

1 mm

depth and covered at once with a coverslip and was allowed to stand overnight to prepare the gel samples for rheological measurements.…”

Section: Methodsmentioning

confidence: 99%

Surfactant head group and concentration influence on structure and dynamics of gellan gum hydrogels: Crossover from stretched to compressed exponential

Mithra

Jena

2021

Journal of Polymer Science

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Synthesis, Characterization, and Interaction Studies of Naphtho‐[2,3]‐furan‐Based Molecules with CTAB as Model Surfactant

Ali,

Kaur,

Agarwal

2024

ChemistrySelect

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The synthesis of highly sensitive UV–visible active naphthofuran derivatives, namely naphtho‐[2,3]‐furan‐3‐yl acetate (NF), 9‐bromonaphtho‐[2,3]‐furan‐3‐yl acetate (BNF), 9‐nitronaphtho‐[2,3]‐furan‐3‐yl acetate (NNF), 9‐iodonaphtho‐[2,3]‐furan‐3‐yl acetate (INF), and naphtho‐[2,1‐b]‐furan‐4‐carboxylic acid (ONF) as solvatochromic molecules, was carried out through multistep synthetic approach. These molecules possess different substituents that tend to form micelles in cetyl trimethylammonium bromide (CTAB) aqueous system. During the micellization process, the absorption spectrum of the synthesized molecule exhibits sensitivity towards the polarity of the environment, which affects the critical micelle concentration (cmc) of CTAB. This study demonstrates that synthesized molecules can be used for estimating solvent polarity and cmc.

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Surfactant (CTAB)-Modified Composite Electrodes for Electrochemical Determination of Drugs

Jayaprakash,

Flores-Moreno,

Reddy

et al. 2024

Advances in Surfactant Biosensor and Sensor Technologies

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Taking advantage of CTAB micelles for the simultaneous electrochemical quantification of diclofenac and acetaminophen in aqueous media

Abstract: Cetyltrimethylammonium bromide hemimicelles, formed on the surfaces of a carbon paste electrode, selectively adsorbed diclofenac molecules from a neutral aqueous solution containing acetaminophen, allowing simultaneous quantification of both drugs.

Cited by 7 publications

References 46 publications

Surfactant head group and concentration influence on structure and dynamics of gellan gum hydrogels: Crossover from stretched to compressed exponential

Surfactant head group and concentration influence on structure and dynamics of gellan gum hydrogels: Crossover from stretched to compressed exponential

Synthesis, Characterization, and Interaction Studies of Naphtho‐[2,3]‐furan‐Based Molecules with CTAB as Model Surfactant

Surfactant (CTAB)-Modified Composite Electrodes for Electrochemical Determination of Drugs

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