Development of Analytical Method of Linear Alkylbenzenesulfonates and Their Degradation Intermediates by High Performance Liquid Chromatography Equipped with Tandem Mass Spectrometry and Its Application to Major Japanese Rivers

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  • MANAGAKI Satoshi
    Laboratory of Organic Geochemistry, Faculty of Agriculture, Tokyo University of Agriculture and Technology
  • KOJIMA Sawaka
    Laboratory of Organic Geochemistry, Faculty of Agriculture, Tokyo University of Agriculture and Technology
  • HARADA Arata
    Water Environment Research Group, Public Works Research Institute
  • NANADA Norihide
    Water Environment Research Group, Public Works Research Institute
  • TANAKA Hiroaki
    Research Center for Environmental Quality Control, Kyoto University
  • TAKADA Hideshige
    Laboratory of Organic Geochemistry, Faculty of Agriculture, Tokyo University of Agriculture and Technology

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Other Title
  • 高速液体クロマトグラフィー質量分析計による直鎖アルキルベンゼンスルホン酸塩および分解産物の分析方法の開発と環境試料への応用
  • コウソク エキタイ クロマトグラフィー シツリョウ ブンセキケイ ニ ヨル チョクサ アルキルベンゼンスルホン サンエン オヨビ ブンカイ サンブツ ノ ブンセキ ホウホウ ノ カイハツ ト カンキョウ シリョウ エ ノ オウヨウ

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Abstract

A method was developed for the simultaneous trace analysis of linear alkylbenzene sulfonate(LAS) and their biodegradation intermediates, sulfophenyl carboxylates (SPC), in sewage effluent and river water. Sensitive determination using a liquid chromatograph equipped with a tandem mass spectrometer (LC-MS/MS) following solid-phase extraction was employed. The analytical method was applied to study the behavior of LAS and SPC during sewage treatment. SPC concentration (sum of C5-C13 SPC: 80μg·l-1) in secondary effluent was 2.5 times higher than that in raw sewage (30μg·l-1), whereas very high levels of removal (99.2%) of LAS (sum of C10-C14 LAS) was observed during the secondary treatments. This suggests the formation of SPC by biodegradation of LAS during sewage treatment. Broad-spectrum monitoring of synthetic-detergent-derived compounds including LAS, SPC and fluorescent whitening agents (FWAs; DSBP and DAS1) was conducted for 20 representative Japanese rivers. LAS, SPC, and FWAs were widely distributed in the river water at concentrations in the range of 0.2-63μg·l-1, 0.02-68μg·l-1, and 0.013-4.55μg·l-1, respectively. Higher concentrations of the detergent-derived pollutants were observed in urban rivers which have larger populations in their catchment areas. In many rivers, SPC concentrations were higher than those of LAS, suggesting that SPC should be considered in the risk assessment of LAS.

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