Quantification of Sodium Dodecyl Sulfate in a Two-Phase System Using Filament-Pulse-Pyrolysis-Gas Chromatography

Almén, Per; Ericsson, Ingvar

doi:10.1021/la00001a021

Cited by 5 publications

(2 citation statements)

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“…For example, SDS is tolerated by bacteria in antimicrobial studies of nanoparticles. 30 However, if it undergoes pyrolysis, it's major products are the fatty alcohol dodecane and dodecene. Dodecane could certainly disrupt bacterial growth or even be bactericidal itself, so at the least, it will serve as an interferent in such studies.…”

Section: Resultsmentioning

confidence: 99%

Size and polydispersity trends found in gold nanoparticles synthesized by laser ablation in liquids

Tomko

Naddeo

Jimenez

et al. 2015

Phys. Chem. Chem. Phys.

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In this work, the effect of laser fluence on Au nanoparticles synthesized via laser ablation in liquids is studied for 1064 nm irradiation with 25 ps pulses. Particle size and polydispersity is found to display a negative trend with fluences up to ∼14 J cm(-2). Erratic size tendencies are observed at low fluences, i.e. slightly above the ablation threshold. This overall behavior is reconciled with recent computational studies and to fluctuations in ablation due to surface morphology. The effectiveness of the commonly used surfactant sodium dodecyl sulfate (SDS) is shown to diminish at higher fluence due to pyrolysis. In addition, shadowgraph imaging of the cavitation bubble is shown as a useful technique for determining the ablation threshold. Our findings are in good agreement with threshold values determined by traditional methods and are comparable to computational values, when differences in pulse duration are taken into account.

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Section: Resultsmentioning

confidence: 99%

Size and polydispersity trends found in gold nanoparticles synthesized by laser ablation in liquids

Tomko

Naddeo

Jimenez

et al. 2015

Phys. Chem. Chem. Phys.

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“…A detailed description of the analysis procedure, which allowed the determination of the SDS concentration in mixed samples down to a concentration of 6 M, is given elsewhere. 33 Polymer concentrations were measured by a colorimetric method using a UV-visible Perkin-Elmer spectrophotometer.34…”

Section: Methodsmentioning

confidence: 99%

Interactions in Aqueous Mixtures of Hydrophobically Modified Polyelectrolyte and Oppositely Charged Surfactant. Mixed Micelle Formation and Associative Phase Separation

Guillemet¹,

Piculell²

1995

J. Phys. Chem.

151

170

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Aqueous mixtures of sodium dodecyl sulfate (SDS) with QUATRISOFT LM200, a cellulose derivative substituted with cationic hydrophobic side chains, have been investigated by various techniques, in the absence and in the presence of added salt. Steady state fluorescence measurements show that hydrophobic microdomains are formed in aqueous solutions of LM200 already at low concentrations ( 4 % ) . On adding SDS to a solution of LM200 in the range 0.02-1%, liquid-liquid phase separation occurs near charge neutralization (for the same amount of polymer and surfactant charges) for the salt-free mixture arid earlier in the presence of salt.In both cases, redissolution occurs upon further SDS addition. The total SDS concentration at redissolution increases linearly with polymer concentration, from a limiting value, at vanishing polymer content, close to the cmc of the polymer-free solution. Viscosity measurements show that SDS associates to LM200 already at very low SDS concentrations M) and that the binding continues even after redissolution up to the highest investigated ratios of SDS to LM200. In a 1% solution, a very high viscosity is found on both sides of the two-phase area, as previously shown by Goddard and Leung (Colloids Surf. 1992, 65, 211). The results are interpreted in terms of a binding isotherm of surfactant to polymer, analogous to isotherms observed for surfactants binding to proteins or to micelles of other surfactants. The first stages of the isotherm involve binding of individual surfactant molecules to the mixed micelles, and the last stage, occurring when the free surfactant concentration approaches cmc, is a strong and cooperative binding related to the self-association of the surfactant. High SDSLM200 binding ratios seem required for redissolution and even higher for breaking the micellar cross-links responsible for the enhanced viscosity. Such high binding ratios are only obtained near or within the cooperative binding region, i.e. when the free surfactant concentration is close to the cmc.

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Studies of the thermal degradation of polysulfones by filament-pulse pyrolysis—gas chromatography

Almén

Ericsson

1995

Polymer Degradation and Stability

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Quantification of Sodium Dodecyl Sulfate in a Two-Phase System Using Filament-Pulse-Pyrolysis-Gas Chromatography

Cited by 5 publications

References 0 publications

Size and polydispersity trends found in gold nanoparticles synthesized by laser ablation in liquids

Size and polydispersity trends found in gold nanoparticles synthesized by laser ablation in liquids

Interactions in Aqueous Mixtures of Hydrophobically Modified Polyelectrolyte and Oppositely Charged Surfactant. Mixed Micelle Formation and Associative Phase Separation

Studies of the thermal degradation of polysulfones by filament-pulse pyrolysis—gas chromatography

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