High-performance liquid chromatographic-fluorescence determination of aliphatic alcohol polyethoxylates and polye(thylene glycol)s in aqueous samples

Determination of Non-Ionic Surfactants of the Alcohol Polyethoxylate Type by Means of High Temperature Gas Chromatography and Atomic Emission Detection

“…55% of the 1.15610 6 ton world production of non-ionic surfactants. In Western Europe this percentage increases to about 75% due to the decision to phase out the use of aromatic polyethoxylated alkylphenols which have been shown to biodegrade via the formation of toxic intermediates [1].…”

“…The elution according to both the alkyl and ethoxylate chain lengths in HPLC is also possible [6,31], but results in poor separation efficiency. Supercritical fluid chromatography (SFC) [9,10,23] shows a higher extent of resolution, but best separation efficiency of individual homologues can be obtained by high temperature gas chromatography (HT-GC) [9 -11].…”

Determination of nonionic aliphatic and aromatic polyethoxylated surfactants in environmental aqueous samples

“…In this work 1-naphthyl isocyanate (NIC) was applied as derivatizing agent for AE and NPE. This fluorescent reagent permits to attain quantitatively, with high sensitivity and reproducibility, AE, PEG and NPE derivatives suitable for RP-HPLC separation under fluorescence detection [19]. The derivatization by NIC, which permits to perform a homolog-by-homolog separation, results to be highly preferable to other fluorescent agents, since peaks identification and quantitation are easier and more accurate, allowing moreover to improve the detection limit.…”

Analysis of Surfactants in Environmental Samples by Chromatographic Techniques

“…However, aliphatic surfactants (e.g., AEOs and AES) have not been monitored so much due to their lack of UV absorbance or fluorescence. Prior derivatization using phenylisocyanate [132], naphthyl isocyanate and naphthyl chloride (NC) [88,133], among others, must be carried out. Nowadays, however, this kind of surfactants, along with LAS, NPEOs and many other organic microcontaminants, are preferably determined by HPLC-MS, which offers several advantages over other detectors such as sensitivity, selectivity, and simultaneous identification and confirmation of multiple analyte classes by means of their molecular weight, retention time and mass spectra.…”