High-performance liquid chromatography and detection of polyethers and their mono(carboxy)alkyl and -arylalkyl substituted derivatives

Rißler, Klaus

doi:10.1016/0021-9673(96)00168-9

Cited by 69 publications

(43 citation statements)

References 172 publications

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“…PEGs having more repeating units retained strongly on the stationary phase; the elution order was based on the degree of the polymerization, as is generally observed in conventional RP-HPLC. 10 The effect of the detection wavelength on the UV detection of PEGs was investigated in terms of the detection limit (S/N = 3) for TeEG. The detection limits obtained at 190 nm, 195 nm and 200 nm were 0.16 µg, 0.33 µg and 1.2 µg, respectively; the detection at 190 nm provided the lowest detection limit.…”

Section: Uv Detection Of Pegsmentioning

confidence: 99%

Superheated Water Chromatography of Low Molecular Weight Polyethylene Glycols with Ultraviolet Detection

et al. 2005

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Section: Uv Detection Of Pegsmentioning

confidence: 99%

Superheated Water Chromatography of Low Molecular Weight Polyethylene Glycols with Ultraviolet Detection

et al. 2005

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“…Different analytical techniques are available for the determination of FAE, including spectroscopy [1], separation [2] and hyphenated techniques [3]. HPLC is the most common method and is widely used to characterize nonionic surfactant samples [4,5]. CE has increasingly been applied for the analysis of surfactants in recent years.…”

Section: Introductionmentioning

confidence: 99%

Rapid characterization of fatty alcohol ethoxylates by non‐aqueous capillary electrophoresis

et al. 2008

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Fatty alcohol ethoxylates (FAE) (a mixture of nonionic surfactants) have been characterized using NACE with UV detection. Phenyl polyurethane derivatives of these compounds were previously obtained by reaction with phenyl isocyanate. The derivatization reaction only requires microwave irradiation for 30 s (600 W). Phenyl polyurethanes were separated and characterized using a BGE containing a mixture of ammonium nitrate (15 mM), acetic acid (1.5%) and 9:1 v/v methanol/ACN. After optimization of the instrumental conditions for the separation, phenyl polyurethane compounds (formed from the corresponding FAE) with ethylene oxide numbers (EON) of 6 (certified standard and industrial samples), 7 and 10 (both as industrial samples), and 5.5 (microemulsion phase) were successfully separated and characterized. The properties of these FAE nonionic surfactants are very important in the petroleum industry, which requires characterization of the quality of the purchased materials as well as the final products in the microemulsion-oil-water stream process. This analytical objective has been achieved by the proposed NACE methods, allowing FAE to be distinguished from 5.5 to 10 EON with errors below 4%, and shows advantages against to HPLC methods.

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“…To determine these characteristics, many separation methods have been developed in the past, e.g. normal phase or RP-HPLC [2], supercritical-fluid chromatography [3] and size-exclusion chromatography [4], all employing UV detection. Since the PEGs are devoid of a chromophore, various derivatization methods were utilized [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the molecular size distribution of polyethylene glycols by CE‐UV versus HPLC with evaporative light scattering detection

Brinz

Holzgrabe

2008

Electrophoresis

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A simple capillary zone electrophoresis method has been developed for the separation of polyethylene glycols (PEGs) consisting of differing amounts of polymers with different monomer numbers up to an average molecular mass of 1500. To provide both charge and detectability, the analytes were derivatized with phthalic anhydride according to a conventional method and a newly developed microwave-assisted method. While obtaining nearly equal amounts of single and double esterificated PEGs with the conventional method, the fraction of single derivatized PEGs is considerably reduced by microwave-assisted reaction. In order to compare the capillary zone electrophoresis results, an HPLC method with evaporative light scattering detection has been established. This method was successfully applied to the analysis of underivatized PEG 400, 1000 and 1500.

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High-performance liquid chromatography and detection of polyethers and their mono(carboxy)alkyl and -arylalkyl substituted derivatives

Cited by 69 publications

References 172 publications

Superheated Water Chromatography of Low Molecular Weight Polyethylene Glycols with Ultraviolet Detection

Superheated Water Chromatography of Low Molecular Weight Polyethylene Glycols with Ultraviolet Detection

Rapid characterization of fatty alcohol ethoxylates by non‐aqueous capillary electrophoresis

Analysis of the molecular size distribution of polyethylene glycols by CE‐UV versus HPLC with evaporative light scattering detection

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