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DETERMINATION OF TRACE MERCURY IN MILK BY ELECTROCHEMICAL COLD VAPOR GENERATION COUPLED WITH ATOMIC FLUORESCENCE SPECTROMETRY

Xun Li

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Abstract

A sensitive method for determination of mercury was developed using an intermittent flow electrochemical cold vapor generation coupled with atomic fluorescence spectrometry (ECVG-AFS). The mercury vapor was generated in the electrochemical flow cell. The operating conditions were optimized such as the concentration of sulfuric acid and the electrolytic current. The calibration curve was linear up to 5 μg/L Hg. A detection limit of 1.5 ng/L Hg and a relative standard deviation of 2.3 % for 1 μg/L Hg were obtained. The method has been applied to the determination of trace mercury in milk,and the recovery was intherangeof 96 %-104 %.

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What this paper is about

A sensitive method for determination of mercury was developed using an intermittent flow electrochemical cold vapor generation coupled with atomic fluorescence spectrometry (ECVG-AFS). The mercury vapor was generated in the electrochemical flow cell. The operating conditions were optimized such as the concentration of sulfuric acid and the electrolytic current. The calibration curve was linear up to 5 μg/L Hg. A detection limit of 1.5 ng/L Hg and a relative standard deviation of 2.3 % for 1 μg/L Hg were obtained. The method has been applied to the determination of trace mercury in milk,and the recovery was intherangeof 96 %-104 %.

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Available abstract

A sensitive method for determination of mercury was developed using an intermittent flow electrochemical cold vapor generation coupled with atomic fluorescence spectrometry (ECVG-AFS). The mercury vapor was generated in the electrochemical flow cell. The operating conditions were optimized such as the concentration of sulfuric acid and the electrolytic current. The calibration curve was linear up to 5 μg/L Hg. A detection limit of 1.5 ng/L Hg and a relative standard deviation of 2.3 % for 1 μg/L Hg were obtained. The method has been applied to the determination of trace mercury in milk,and the recovery was intherangeof 96 %-104 %.

Key concepts: Mercury (programming language), Chemistry, Detection limit, Calibration curve, Analytical Chemistry (journal), Sulfuric acid, Electrochemistry, Mass spectrometry

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DETERMINATION OF TRACE MERCURY IN MILK BY ELECTROCHEMICAL COLD VAPOR GENERATION COUPLED WITH ATOMIC FLUORESCENCE SPECTROMETRY — Research Paper | ScholarLens