Environmental Chemistry

ISSN 0254-6108

CN 11-1844/X

Vol. 38 No. 5
May  2019
Article Contents

Citation:

Simultaneous determination of various odorous VOC substances in sewage wastewater by HS-SPME-GC/MS

  • Received Date: 2018-07-12
    Fund Project:

    Supported by the National Natural Science Foundation of China (21577160, 51338010, 51290282).

  • A rapid and quantitative method based on headspace-solid phase micro-extraction (HS-SPME) with gas chromatography-mass spectrometry(GC-MS) was used to analyze the volatile organic odorous substances(VOCs)produced in sewage wastewater. The studied VOCs, which mainly include OVOCs, VSCs and BTEX, are major odorous pollutants. According to the properties of different odorous substances, the conditions of the HS-SPME, such as extraction fiber coating, extraction temperature, extraction time, salting out effect and resolution time, were optimized experimentally.The results show that DVB/CAR/PDMS (50/30 μm) has the highest extraction selectivity for the VOCs.The optimal condition was obtained as follows:20% (W/V) NaCl was added to the water sample, and the VOCs were extracted under incubation conditions at 65℃ for 30 min,and then analyzed for 180 s.The VOCs were found to be linear in the validated range with correction coefficients(R2) better than 0.98.The detection limits of the method were all less than 4-55 ng·L-1, while the relative standard deviations(RSD) were in a range of 9.8%-15.5%, the average recovery rate was 79.1%-108.6%. This method was used to detect different sewage wastewaters. The experimental results show that the method can simultaneously identify multiple trace odor substances in different sewage wastewaters.
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Simultaneous determination of various odorous VOC substances in sewage wastewater by HS-SPME-GC/MS

  • 1. China University of Geosciences(Wuhan), Wuhan, 430000, China;
  • 2. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China;
  • 3. University of Chinese Academy of Sciences, Beijing, 100049, China;
  • 4. Research and Development Center, Beijing Drainage Group Co., Ltd., Beijing, 100124, China
Fund Project:  Supported by the National Natural Science Foundation of China (21577160, 51338010, 51290282).

Abstract: A rapid and quantitative method based on headspace-solid phase micro-extraction (HS-SPME) with gas chromatography-mass spectrometry(GC-MS) was used to analyze the volatile organic odorous substances(VOCs)produced in sewage wastewater. The studied VOCs, which mainly include OVOCs, VSCs and BTEX, are major odorous pollutants. According to the properties of different odorous substances, the conditions of the HS-SPME, such as extraction fiber coating, extraction temperature, extraction time, salting out effect and resolution time, were optimized experimentally.The results show that DVB/CAR/PDMS (50/30 μm) has the highest extraction selectivity for the VOCs.The optimal condition was obtained as follows:20% (W/V) NaCl was added to the water sample, and the VOCs were extracted under incubation conditions at 65℃ for 30 min,and then analyzed for 180 s.The VOCs were found to be linear in the validated range with correction coefficients(R2) better than 0.98.The detection limits of the method were all less than 4-55 ng·L-1, while the relative standard deviations(RSD) were in a range of 9.8%-15.5%, the average recovery rate was 79.1%-108.6%. This method was used to detect different sewage wastewaters. The experimental results show that the method can simultaneously identify multiple trace odor substances in different sewage wastewaters.

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