Modern methods for the analysis of cocoamidopropyl betaines / Moderne Methoden zur Analyse von Cocoamidopropylbetainen

Gerhards, R.; Jussofie, I.; Käseborn, D.; Keune, S.; Schulz, Rolf C.

doi:10.1515/tsd-1996-330103

Cited by 16 publications

(1 citation statement)

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“…Plantinga et al 21 claimed that a potentiometric acidÀbase titration method could be used to determine alkyldimethylbetaine and free amine. In addition, Gerhards et al 22 presented that tetraphenylborate titration could be used to determine carboxybetaines of alkyl chain length C 8 with the concentration higher than 0.2 wt %. For the homologues with less solubility and higher chain length, the detection limit was correspondingly lower.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Behavior of Betaine-Type Surfactant on Quartz Sand

Zhang

et al. 2011

Energy Fuels

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The betaine-type amphoteric surfactant exhibits excellent ability in reducing oilÀwater interfacial tension for many kinds of crude oil, but less attention is paid to its adsorption behavior on oil reservoir rock. In this paper, a high-performance liquid chromatography (HPLC) method is established to measure the adsorption of betaine on quartz sand. The mobile phase consists of methanol and water (methanol/water = 90:10 or 85:15 by volume). The column temperature is 40 °C; the flow rate is 1 mL/min; and the sample volume is 20 mL. On the basis of this method, the adsorption of the betaine-type surfactant and sodium dodecyl benzene sulfonate (SDBS) in different conditions was measured and compared. The results indicate that the adsorption of the carboxybetaine-type surfactant and sulfobetaine-type surfactant decreases first and then increases with the increase of the NaCl concentration and reaches relatively low points when the concentration of NaCl is 5 and 10À20 wt %, respectively. The adsorption of SDBS increases with the NaCl concentration monotonically, which is at least 50% higher than that of the betaine surfactant when the concentration of NaCl is over 5 wt %. After Ca 2+ was added to the solution, the adsorption of the betaine-type surfactant on the quartz sand surface, as the opposite case of SDBS, decreases. Moreover, it is found that the adsorption of betaine on the surface of quartz correspondingly decreases with the increase of pH. These behaviors can be explained by the charges of the betaine-type surfactant molecule and the quartz surface. The investigation is instructive for surfactant selection for enhanced oil recovery (EOR).

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Section: Introductionmentioning

confidence: 99%

Adsorption Behavior of Betaine-Type Surfactant on Quartz Sand

Zhang

et al. 2011

Energy Fuels

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Analyse von Tensiden

Waldhoff

Scherler

Bütfering

1999

Analytiker-Taschenbuch

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Analysis of surfactants: Part I

Morelli¹,

Szajer²

2000

J Surfact & Detergents

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We present a comprehensive review of the literature devoted to the analysis of surfactants. The period covered is 1995 through 1998. We address patents, reviews, books, journal articles, and any conference proceedings abstracted by Chemical Abstract Services. We consider classical, instrumental, and state-of-the-art analytical applications, including those not in common practice but in a developmental stage. We also include analytical techniques that make use of surfactants for improved performance, although such treatment is not comprehensive. Literature from foreign language sources is covered as completely as practical.

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Modern methods for the analysis of cocoamidopropyl betaines / Moderne Methoden zur Analyse von Cocoamidopropylbetainen

Cited by 16 publications

References 0 publications

Adsorption Behavior of Betaine-Type Surfactant on Quartz Sand

Adsorption Behavior of Betaine-Type Surfactant on Quartz Sand

Analyse von Tensiden

Analysis of surfactants: Part I

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