Occurrence and fate of linear and branched alkylbenzenesulfonates and their metabolites in surface waters in the Philippines

Eichhorn, Peter; Flavier, Maxima E.; Paje, M. Luz; Knepper, Thomas P.

doi:10.1016/s0048-9697(00)00825-1

Cited by 47 publications

(24 citation statements)

References 16 publications

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“…Holt et al, 1995;Holt et al, 1998;Waters and Feijtel, 1995) and in rivers (e.g. McAvoy et al, 1993;Whelan et al, 1999;Fox et al, 2000;Eichhorn et al, 2001;Eichhorn et al, 2002; (Holt et al, 1995). A removal rate for LAS in WWTPs was assumed to be 98% which is appropriate for activated sludge type plants (Holt et al, 1995), the dominant type of treatment technology currently being deployed across China (e.g.…”

Section: Application To Chinamentioning

confidence: 99%

Estimating surface water concentrations of “down-the-drain” chemicals in China using a global model

Whelan¹,

Hodges²,

Williams³

et al. 2012

Environmental Pollution

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Predictions of surface water exposure to "down-the-drain" chemicals are presented which employ grid-based spatially-referenced data on average monthly runoff, population density, country-specific per capita domestic water and substance use rates and sewage treatment provision. Water and chemical load are routed through the landscape using flow directions derived from digital elevation data, accounting for in-stream chemical losses using simple first order kinetics. Although the spatial and temporal resolution of the model are relatively coarse, the model still has advantages over spatially inexplicit "unit-world" approaches, which apply arbitrary dilution factors, in terms of predicting the location of exposure hotspots and the statistical distribution of concentrations. The latter can be employed in probabilistic risk assessments. Here the model was applied to predict surface water exposure to "downthe-drain" chemicals in China for different levels of sewage treatment provision.Predicted spatial patterns of concentration were consistent with observed water quality classes for China.Key Words: Global, Exposure, Chemical, Model, China Capsule AbstractA global-scale model was used to predict spatial patterns of "down-the-drain" chemical concentrations in China. Predictions were consistent with observed water quality classes, demonstrating the potential value of the model.3

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Section: Application To Chinamentioning

confidence: 99%

Estimating surface water concentrations of “down-the-drain” chemicals in China using a global model

Whelan¹,

Hodges²,

Williams³

et al. 2012

Environmental Pollution

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“…[4][5][6] However, some derivatization steps to convert LAS into a volatile compound 7,8 are unavoidable for GC procedures, because LASs are not volatile enough to permit direct measurement by GC. LC has widely been applied to the determination of LAS in various environmental samples without any derivatization using ultraviolet (UV), 9-11 fluorescence (FL), [12][13][14][15][16] and MS [17][18][19] detection. Nakae et al 12,13 obtained an excellent separation of many LAS components (homologues and isomers) by reversed-phase chromatography with FL detection.…”

Section: Introductionmentioning

confidence: 99%

“…19 Several studies have been published on the determination of LASs in sewage and river water by LC/MS. [17][18][19] However, the separation is usually carried out only on the homologue level, so that discussions about their isomer concentrations are not yet available.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Determination of Linear Alkylbenzenesulfonates in Environmental Water Samples by High-Performance Liquid Chromatography with a Hydrophilic Polymer Column and Electrospray Ionization Mass Spectrometric Detection

2004

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A liquid chromatography-mass spectrometry (LC/MS) method was developed for the separation and determination of linear alkylbenzenesulfonates (C10 -C14 LAS) in environmental water samples using a hydrophilic polymer column . This method involves a solid-phase extraction of the LAS samples with a Sep-Pak PS-2 cartridge. The LAS components were separated on the column with a mobile phase of 29% (w/v) acetonitrile-water containing 0.8 mM di-n-butylammonium acetate and 0.2 M acetic acid, and were detected by mass spectrometry with electrospray ionization. Detection limits of the developed method based on selected ion monitoring (SIM) technique for the C10 -C14 LAS standards were 13 -47 ng L -1 . The concentrations of the C10 -C14 LAS in the environmental water samples ranged between 5 -317 µg L -1 for a river water sample and 0.4 -6.4 µg L -1 for a seawater sample. Linear relationships between the logarithms of retention factors and the alkyl chain lengths for each phenyl positional isomer of LAS could successfully be used for the identification of the isomer peaks.

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“…16 The reversed-phase HPLC method provides the separation of LAS mixture and may use various chromatographic detectors, as spectrometry ultraviolet (UV), 22 fluorescence 4,23,24 and mass spectrometry (MS). 25,26 Most HPLC methods with UV detector require the mobile phase to contain either sodium perchlorate 25 or additive, such as triethylamine and acetic acid. 26,27 The practical application of mobile phases containing high amounts of those compounds, particularly sodium perchlorate (10 g L -1 ), can abbreviate the useful life of the column.…”

Section: Introductionmentioning

confidence: 99%

“…25,26 Most HPLC methods with UV detector require the mobile phase to contain either sodium perchlorate 25 or additive, such as triethylamine and acetic acid. 26,27 The practical application of mobile phases containing high amounts of those compounds, particularly sodium perchlorate (10 g L -1 ), can abbreviate the useful life of the column. The higher the content of sodium perchlorate present in the mobile phase, the higher is the retention of LAS in the column.…”

Section: Introductionmentioning

confidence: 99%

Development of a method by HPLC to determine LAS and its application in anaerobic reactors

Duarte¹,

Oliveira²,

Buzzini³

et al. 2006

J. Braz. Chem. Soc.

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Este trabalho descreve o desenvolvimento e a validação de um método que usa cromatografia líquida de alta eficiência para determinação de Alquilbenzeno Linear Sulfonado (LAS) em amostras de águas provenientes de reatores anaeróbios. O padrão de LAS aplicado foi ácido dodecilbenzeno sulfônico-sal sódico, que apresentou 4 picos principais no cromatograma, relacionados aos diferentes homólogos da cadeia alquílica linear. Diferentes condições cromatográficas foram testadas, tais como, fases estacionárias C-18, C-12 e C-8; detectores de ultravioleta e de fluorescência, composição da fase móvel e tempo de programação do gradiente de eluição. A melhor condição cromatográfica obtida foi com a coluna C-8, fase móvel: metanol/ perclorato de sódio 0,075 mol L -1 e detector de fluorescência. A validação deste método foi feita através das curvas de calibração de LAS, usando água e substrato sintético como solventes. O método foi validado com o objetivo de demonstrar sua precisão, linearidade, limite de detecção para cada homólogo e a sua precisão instrumental.This work describes the development and validation of a method using High Performance Liquid Chromatography (HPLC) for Linear Alkylbenzene Sulfonate (LAS) determination in sample of wastewater from anaerobic reactors. The applied LAS standard was the dodecylbenzene sulfonic acid-sodium salt, which presents four main peaks in the chromatogram, related to different homologous of the linear alkyl chain. Different chromatographic conditions were tested with C-18, C-12 and C-8 as stationary phases, ultraviolet and fluorescence detectors, mobile phase (MP) compositions and programming time of elution gradient. The best chromatographic condition was obtained with the C-8 column, MP: methanol and of sodium perchlorate (0.075 mol L -1 ). The validation of this method was made with the calibration of LAS curves using water and synthetic substrate as solvents. The method was validated in order to demonstrate its precision, linearity, limit of detection of each homolog and its instrumental precision.

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Occurrence and fate of linear and branched alkylbenzenesulfonates and their metabolites in surface waters in the Philippines

Cited by 47 publications

References 16 publications

Estimating surface water concentrations of “down-the-drain” chemicals in China using a global model

Estimating surface water concentrations of “down-the-drain” chemicals in China using a global model

Characterization and Determination of Linear Alkylbenzenesulfonates in Environmental Water Samples by High-Performance Liquid Chromatography with a Hydrophilic Polymer Column and Electrospray Ionization Mass Spectrometric Detection

Development of a method by HPLC to determine LAS and its application in anaerobic reactors

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