Highly Sensitive Determination of Chlorophenols in Sea Water by Gas Chromatography−Tandem Mass Spectrometry
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A procedure is developed for the simultaneous highly sensitive determination of eight chlorophenols in sea water based on a combination of isotope dilution, solid-phase extraction on an octadecyl adsorbent, acetylation, and determination by gas chromatography–tandem mass spectrometry with electron ionization. The attained limits of detection for the analytes are in the range 0.06−0.26 ng/L, which is 2−3 orders of magnitude lower than the standards established for the maximum permissible concentration. The duration of analysis is 15 min. The application of a deuterated internal standard ensures the high accuracy and reproducibility of the results obtained. The developed procedure was successfully used for the analysis of real water samples from the Barents Sea; the found total chlorophenol concentration in them was 15–24 ng/L. The main pollutant of the studied sea water samples is 2,4-dichlorophenol, which comprised about 30% of the total concentration of chlorophenols.
Keywords:chlorophenols gas chromatography tandem mass spectrometry solid-phase extraction sea water
This work was performed using instrumentation of the “Arktika” Core Facility Center of the Northern (Arctic) Federal University (unique identifier RFMEFI59417X0013) with the financial support of the Ministry of Education and Science of the Russian Federation (state task project no. 4.2518.2017/4.6).The authors express their gratitude to the team of the joint expedition of NAFU and Rosgidromet “Arctic Floating University—2015” for their assistance in sampling sea water.
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