Quantitative determination of quaternary ammonium bases (QAB) in water and wastewater by thin layer chromatography

Michelsen, E. R.

doi:10.1515/tsd-1978-150401

Cited by 20 publications

(1 citation statement)

References 10 publications

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“…Aromatic surfactants like LAS can be determined by HPLC with UV absorption or fluorescence detection, − but aliphatic surfactants lacking chromophores are not directly amenable to photometric detectors. Several procedures for the determination of DTDMAC in various environmental matrices have been published, including a colorimetric method commonly referred to as disulfine blue active substances (DBAS), a combination of DBAS and thin-layer chromatography, ,, a combination of TLC or chromatography on aluminum oxide and infrared spectroscopy, , an isocratic HPLC method coupled with conductometric detection, ,,− and an isocratic or gradient , HPLC method applying postcolumn ion-pair formation and extraction with UV/vis or fluorescence detection. Gas chromatography has been used for the qualitative determination of long-chain cationic surfactants by converting them to the corresponding tertiary amines by thermal decomposition in the injector port and subsequently analyzing them in the GC. ,, The potential of FAB-MS techniques for the determination of trace levels of cationic surfactants in aqueous environmental matrices has also been demonstrated. , …”

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Determination of the Quaternary Ammonium Surfactant Ditallowdimethylammonium in Digested Sludges and Marine Sediments by Supercritical Fluid Extraction and Liquid Chromatography with Postcolumn Ion-Pair Formation

et al. 1996

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To study the phasing-out of the quaternary ammonium surfactant ditallowdimethylammonium cation (DTDMAC), concentrations of the cation in anaerobically stabilized sewage sludges were determined before and after its replacement by better degradable compounds. DTDMAC was quantitatively extracted from digested sludges using 380 atm of supercritical CO(2) modified with 30% methanol at 100 °C. Determination of DTDMAC was performed by normal-phase HPLC with postcolumn ion-pair formation and extraction with no sample cleanup. Mean concentrations of DTDMAC in sludges from five different municipal sewage treatment plants in Switzerland decreased from 3.67 g/kg (in 1991) to 0.96, 0.47, and 0.21 g/kg of dry sludge in 1992, 1993, and 1994, respectively. The precision of the method in digested sludge for 0.1-6.0 g/kg of dry matter, as indicated by the relative standard deviation, was typically 7%. The influence of the sample matrix was studied by performing supercritical fluid extraction (SFE) in coastal marine sediments. While SFE and a conventional liquid extraction method gave equal DTDMAC concentrations in sludges, the extraction of marine sediment samples yielded 30-40% higher DTDMAC values for SFE compared to those obtained by liquid extraction. The 94% drop in DTDMAC concentrations in digested sludges is due to the replacement of this substance and is a clear result of the producers' voluntary ban on its use in Europe.

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confidence: 99%

Determination of the Quaternary Ammonium Surfactant Ditallowdimethylammonium in Digested Sludges and Marine Sediments by Supercritical Fluid Extraction and Liquid Chromatography with Postcolumn Ion-Pair Formation

et al. 1996

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A New Dodecylsulfate Ion-Selective Sensor Based on Electrochemically Prepared Polypyrrole and PVC

Alizadeh

Mahmodian

2000

Electroanalysis

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Dodecylsulfate-doped polypyrrole (PPy-DS) was prepared electrochemically by anodic polymerization of pyrrole in the presence of dodecylsulfate (DS 7 ) ions in aqueous solution and used as a DS 7 sensor. The effect of polymerization conditions on the characteristics of the potential response of the sensor was also investigated. The electrode made with PVC-PPy-DS membrane, plasticized with 2-nitrophenyloctylether (o-NPOE) showed the Nernstian behavior (57.5 mV per decade over 10 75 to 7610 73 M DS 7 ) with a detection limit of 5610 76 M. The response time of the electrode is in the order of a few seconds and can be used for at least six months without any divergence. The electrode is highly selective to DS 7 ion over diverse inorganic anions.

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Role of Quaternary Ammonium Compounds on Antimicrobial Resistance in the Environment

Tezel

Pavlostathis

2011

Antimicrobial Resistance in the Environment

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Quantitative determination of quaternary ammonium bases (QAB) in water and wastewater by thin layer chromatography

Abstract: Organ des Co mite International des Derives tensio-actifs C. I. D. Organ des Deutschen Ausschusses fGr Grenzflachenaktive Stoffe im Verband der Chemischen lndustrie e. V. (DAGSt) Organ der Fachgruppe Waschmittelchemie der Gesellschaft Deutscher Chemiker

Cited by 20 publications

References 10 publications

Determination of the Quaternary Ammonium Surfactant Ditallowdimethylammonium in Digested Sludges and Marine Sediments by Supercritical Fluid Extraction and Liquid Chromatography with Postcolumn Ion-Pair Formation

Determination of the Quaternary Ammonium Surfactant Ditallowdimethylammonium in Digested Sludges and Marine Sediments by Supercritical Fluid Extraction and Liquid Chromatography with Postcolumn Ion-Pair Formation

A New Dodecylsulfate Ion-Selective Sensor Based on Electrochemically Prepared Polypyrrole and PVC

Role of Quaternary Ammonium Compounds on Antimicrobial Resistance in the Environment

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