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Surfactants metabolites

Fig. 2.6.10. APCI-FIA-MS-MS(+) (CID) daughter ion mass spectrum of selected [M + NH4]+ parent ion (mjz 340) of potential carboxylated non-ionic surfactant metabolite of precursor NPEO prepared by chemical synthesis structure of short-chain NPEC CgHi9-C6H4-0-(CH2-CH2-0)-CH2-C00H fragmentation behaviour under CID presented in the inset [28],... [Pg.206]

As for the many surfactant metabolites, their distribution is often more homogeneous due to the loss of surfactant properties by the molecules. This would render the sampling procedure much simpler. [Pg.424]

For several other non-ionic surfactant metabolites, standards are either commercially available, such as for dicarboxylated polyethylene glycols (DCPEGs) [20], or can be synthesised relatively easily, such as for nonylphenoxy acetic acids (NPECs) [21]. For quantification of metabolites for which standards are absent, the most similar available... [Pg.511]

In view of the inherent resistance of some surfactant metabolite isomers to complete mineralisation, efforts have to be mounted in order to obtain further insight into the reasons behind the persistence of these, such as the SPC and nonylphenol ethoxy carboxylates (NPECs). In order to achieve this, it would thus be indispensable to be able to fully elucidate the chemical structure of individual components, e.g. after isolation from environmental samples. Through the application of, for example, LC-ESI-MS-MS in combination with NMR analyses, this is now possible. [Pg.958]

One of the key elements of the WFD is the implementation of a combined approach of emission limit values and quality standards (for waters, sediments and biota), and also the phasing out of particularly hazardous substances. Accordingly, a list of 33 priority substances, which represent a significant risk to the aquatic environment at community level, was established. For the first time two surfactant metabolites, namely NP and OP, have been included in this priority list. [Pg.959]

There are six papers la this section. They deal with biological insecticide formulations (Ward), water dispersible granules (Wright and Ibrahim), analysis of formulations for quality control and identification of toxic contaminants (Plimmer), identification of surfactant metabolites (Stolzenberg et al.), electrostatic spraying (Law) and compatibility and tank-mix testing (Tarwater). [Pg.7]

The sites of -glucosylation in the oxygenated surfactant metabolites are not known (see Figure 1). More details may come from MS of the conjugates or from nuclear magnetic resonance spectra of the conjugates and their aglycones. [Pg.217]

From the appUcation of surfactants in household, handicraft and industry a large quantity of these compounds have been discharged with wastewaters and despite biological treatment considerable quantities of them have reached the environment Therefore surfactants continue to be an environmental concern. Knowledge of the endocrine disrupter potential of some surfactant metabolites had heightened pubhc interest about the fate of these pollutants. [Pg.785]

In Table 16 particular problems and analytical processes are summarized. The literature quoted in the table makes quick access to this subject possible for the reader. A general and detailed overview of the analysis of surfactants can, for example, be found in books of Longman [192], Cross [193], and Schmitt [194], as well as in the reviews of Raid [195,196] and Kunkel [197-199]. In the area of analysis of surfactants present in trace quantities and for metabolites the book by Swisher can be put to good use [200]. [Pg.89]

Organophosphate flame retardants and plasticisers Perfluorinated compounds Pharmaceuticals and personal care products Polar pesticides and their degradation/transformation products Surfactants and their metabolites... [Pg.200]

Griffiths ET, SG Hales, NJ Russell, GK Watson, GF White (1986) Metabolite production during biodegradation of the surfactant sodium dodecyltriethoxy sulphate under mixed-culture die-away conditions. J Gen Microbiol 132 963-972. [Pg.272]

Plant material. Weigh 25 g of the chopped and frozen sample into a blender jar. To check recoveries, spike the fortification samples with the appropriate volume of metabolite standard at this point. Add 200 mL of acetonitrile-water (4 1, v/v) to the jar, and blend the sample at medium speed for 5 min. Filter the extract through a Buchner funnel fitted with a glass-fiber filter pad into a 500-mL round-bottom flask containing 10 drops of Antifoam B and 3 mL of 10% aqueous Igepal CO-660 (nonionic surfactant). The flask is connected to the Buchner funnel by means of an adapter suitable for applying vacuum to the system. [Pg.356]

Applications APCI-MS is often more widely applicable than ESI-MS to the analysis of classes of compounds with a low molecular weight, such as basic drugs and their metabolites, antibiotics, steroids, oestrogens, benzodiazepines, pesticides, surfactants, and most other organic compounds amenable to El. LC-APCI-MS has been used to analyse PET extracts obtained by a disso-lution/precipitation procedure [147]. Other applications of hyphenated APCI mass spectrometric techniques are described elsewhere LC-APCI-MS (Section 7.33.2) and packed column SFC-APCI-MS (Section 73.2.2) for polar nonvolatile organics. [Pg.383]

Schroder, H.E (2003). Determination of fluorinated surfactants and their metabolites in sewage sludge samples by liquid chromatography with mass spectrometry and tandem mass spectrometry after pressurized liquid extraction and separation on fluorine-modified reversed-phase sorbents. J. Chromatogr. A 1020(1), 131-151. [Pg.445]

Ahel M, McEvoy J, Giger W (1993) Bioaccumulation of the lipophilic metabolites of nonionic surfactants in fresh-water organisms. Environ Pollut 79 243-248... [Pg.104]

Giger W, Brunner PH, Schaffner C (1984) 4-Nonylphenol in sewage sludge accumulation of toxic metabolites from nonionic surfactants. Science 225 623-625... [Pg.105]

Bruno F, Curini A, Di Corcia A, Fochi I, Nazzari M, Samperi R (2002) Determination of surfactants and some of their metabolites in untreated and anaerobically digested sewage sludge by subcritical water extraction followed by liquid chromatography-mass spectrometry. Environ Sci Technol 36 4156—4161... [Pg.106]

Surfactants and their metabolites Nonionic surfactants Anionic surfactants Cationic surfactants... [Pg.120]

Fig. 6 General structures of the most important surfactants and metabolites alkylphenol polyethoxylate (APE) alkylphenol (AP) alkyl ether (AE) alkylphenol ethoxy carboxylate (APEC) linear alkylbenzenesulfonates (LAS) alkyltrimethylammonium compounds (ATMAC) dialkyldimethylammonium compounds (DADMAC) alkyldimethylbenzylammonium compounds (ADMBAC) esterquat (EQ) diesterquats (DEQ). X is usually a chlorine or bromine atom. DDAC (didecyldimethylammonium chloride) and BDD12AC (benzyldimethyldode-cylammonium) are the two target analytes with a reported immunochemical technique developed for their analysis [153,154]... Fig. 6 General structures of the most important surfactants and metabolites alkylphenol polyethoxylate (APE) alkylphenol (AP) alkyl ether (AE) alkylphenol ethoxy carboxylate (APEC) linear alkylbenzenesulfonates (LAS) alkyltrimethylammonium compounds (ATMAC) dialkyldimethylammonium compounds (DADMAC) alkyldimethylbenzylammonium compounds (ADMBAC) esterquat (EQ) diesterquats (DEQ). X is usually a chlorine or bromine atom. DDAC (didecyldimethylammonium chloride) and BDD12AC (benzyldimethyldode-cylammonium) are the two target analytes with a reported immunochemical technique developed for their analysis [153,154]...

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