Separation and quantitative determination of long-chain alkyltrimethylammonium ions by reversed-phase ion-pair liquid chromatography using ultraviolet-absorbing counter ions

Helboe, Per

doi:10.1016/s0021-9673(01)87925-5

Cited by 29 publications

(7 citation statements)

References 12 publications

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“…Aqueous concentrations of HDTMA, Br -, Cl -, HSO4 HDTMA was analyzed with a Nucleosil CN column from Sigma-Aldrich (St. Louis, MO) using an aqueous solution of 5 mM p-toluenesulfonate and methanol (45:55, v/v) as the mobile phase (23). The detection wavelength was 254 nm.…”

Section: Methodsmentioning

confidence: 99%

Counterion Effects on the Sorption of Cationic Surfactant and Chromate on Natural Clinoptilolite

Bowman

1997

Environ. Sci. Technol.

313

216

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We determined the effect of selected counterions (Cl-, Br-, and HSO4 -) on the sorption of the cationic surfactant hexadecyltrimethylammonuium (HDTMA) on clinoptilolite zeolite and on the subsequent sorption of chromate by HDTMA−zeolite. The HDTMA sorption on the zeolite, as characterized by the Langmuir sorption maximum, followed the trend HDTMA-Br > HDTMA-Cl > HDTMA-HSO4 (208, 151, and 132 mmol/kg, respectively). The same counterion trend was observed for HDTMA sorption on KGA-1 kaolinite. Measurement of counterion sorption indicated that HDTMA-Br and HDTMA-Cl formed complete bilayers on the zeolite, whereas HDTMA-HSO4 showed less than full bilayer formation. Competitive sorption between HDTMA-Br and HDTMA-Cl on the zeolite also showed a preference for the Br- counterion. The counterion stabilization of HDTMA admicelles on the zeolite surface follows the same trends as the counterion stabilization of micelles in solution. Chromate sorption was also strongly influenced by the HDTMA−zeolite counterion, with chromate sorption maxima decreasing in the order HDTMA-HSO4 > HDTMA-Cl > HDTMA-Br (28, 16, and 11 mmol/kg, respectively). The sorption of chromate and other divalent anions on HDTMA−zeolite results from a combination of entropic, Coulombic, and hydrophobic effects, all of which are functions of the initial HDTMA counterion. In the design of surfactant-modified clays and zeolites for environmental applications, the strong influence of the surfactant counterion must be considered.

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Section: Methodsmentioning

confidence: 99%

Counterion Effects on the Sorption of Cationic Surfactant and Chromate on Natural Clinoptilolite

Bowman

1997

Environ. Sci. Technol.

313

216

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“…The adopted solutions in the literature are focused on the improvement of the stationary phase (encapping, base-deactivated column, etc.) and modification of the mobile phase using buffer, amine modifiers, ion-pair reagent (20)(21)(22)(23)(24)(25)(26)(27)(28)(29), and divalent metals (30). These modifications block stationary phase silanol groups from silanophilic contribution, reducing or eliminating this undesirable effect.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Residual Products in Triethylbenzylammonium Chloride by HPLC. Study of the Retention Mechanism

Prieto-Blanco

López-Mahı́a

Prada‐Rodríguez

2006

Journal of Chromatographic Science

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The control of industrial products for minimization of their impact on the environment and human health requires the development of specific analysis methods. Information provided by these methods about toxic components, by-products, and other derivatives may also be useful to reduce the possible impact of industrial products. The studied compound in this paper, triethylbenzylammonium chloride (TEBA), is mainly used in industrial synthesis. This quaternary compound and its residual products coming from quaternization reaction (benzyl chloride, benzaldehyde, and benzyl alcohol) are analyzed by HPLC. The separation is based on control of the silanophilic contribution to TEBA retention because of the quaternary nature of this compound. The effect of the three buffers (sodium acetate, ammonium acetate, and sodium formate) and their concentrations in the chromatographic behavior of the quaternary compound is examined. The buffer cation and anion regulate TEBA retention. Also, the concentration of the quaternary compound is another parameter that had influence in some aspects of its chromatographic behavior (e.g., retention and symmetry). The proposed method is applied to TEBA synthesis along, with the formation and removal of impurities with the results compared with those obtained for the quaternary compound benzalkonium chloride.

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“…The separation of the long-chain alkyltrimethylammonium ion has been accomplished by reversed-phase ion-pair highperformance LC (HPLC) using ultraviolet-absorbing counter ions (3). Alkylbenzene sulfonate chain distribution has been determined by HPLC (4), and alkyl sulfonates have been measured by HPLC using indirect photometric detection (5).…”

Section: Introductionmentioning

confidence: 99%

Separation of Aliphatic and Aromatic Acids, Aromatic Sulfonates, Quaternary Ammonium Compounds, and Chelating Agents on a Reversed-Phase Column Without Ion Pairing

Skelly¹

2003

Journal of Chromatographic Science

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Cleaning products contain a wide variety of components. These include inorganic materials, weak acids, anionic surfactants, cationic surfactants, amphoteric compounds, and nonionic materials. The separation of these generally requires the use of multichromatographic modes. A system is developed that would give the maximum information for a cleaning product in a single chromatographic run. With the use of a hydrophobic, high-carbon-loading, and a relatively hydrophobic surface reversed-phase packing, such compounds as aromatic sulfonates, quaternary ammonium compounds, weak acids, nitrilotriacetic acid, ethylenediaminetetraacetic acid, and nonionic materials may be separated in a single run. The mode of separation is considered to be a combination of reversed-phase, ion-suppression reversed-phase, and adsorption chromatography. The separation is made on a YMC-Packl ODS-AQl column (4.6 x 250 mm, 120 angstroms). The separation employs a gradient run starting with 0.01 N H2SO4 for 10 min followed by a gradient for 15 min to 100% acetonitrile and continuing for an additional 5 min with 100% acetonitrile. The flow rate is 1 mL/min, and the separation is monitored at 210 nm.

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Separation and quantitative determination of long-chain alkyltrimethylammonium ions by reversed-phase ion-pair liquid chromatography using ultraviolet-absorbing counter ions

Cited by 29 publications

References 12 publications

Counterion Effects on the Sorption of Cationic Surfactant and Chromate on Natural Clinoptilolite

Counterion Effects on the Sorption of Cationic Surfactant and Chromate on Natural Clinoptilolite

Analysis of Residual Products in Triethylbenzylammonium Chloride by HPLC. Study of the Retention Mechanism

Separation of Aliphatic and Aromatic Acids, Aromatic Sulfonates, Quaternary Ammonium Compounds, and Chelating Agents on a Reversed-Phase Column Without Ion Pairing

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