Rapid Determination of Residues of 6 Pollutants in Soil around Rubber Products Industrial Park by Ion Chromatography-Mass Spectrometry
A method for rapid determination of residues of 6 pollutants including butyl xanthan acid,dichloroacetic acid,trichloroacetic acid,gallic acid,tartaric acid,and p-coumaric acid in soil around rubber products industrial park by ion chromatography-mass spectrometry(IC-MS)was proposed.10 g of the dried and sieved soil sample was taken,and placed in the extraction tank.20 g of diatomite was added,and the mixture was extracted with a mixed solution of methanol and acetone at a volume ratio of 2∶1 by accelerated solvent extraction.The extract was passed through a 0.22 µm polyether sulfone filter membrane,in which 6 pollutants were determined by IC-MS.DIONEX Ion-Pac AS17 chromatographic column was used as the stationary phase,and 0.1 mol·L-1 potassium hydroxide solution was used as the rinsing solvent to separate the 6 pollutants.Electrospray ion(ESI)source was used for mass spectrometry.The targets were detected by multiple reaction monitoring(MRM)mode in negative ion(ESI-)scanning mode.As shown by the results,linear relationships between the corresponding peak areas and mass concentrations of 6 pollutants were found within 0.005-5.0 mg·L-1,with detection limits(3S/N)in the range of 0.009-0.023 µg·L-1.Test for recovery was made by the standard addition method,giving results in the range of 83.8%-95.1%,with RSDs(n=6)of the determined values less than 5.0%.This method was used to determine the residues of 6 pollutants in actual soil samples around rubber products industrial park,tartaric acid was not detected,and the detected amounts of the other pollutants were in the range of 13.04-61.25 µg·L-1.
ion chromatography-mass spectrometry(IC-MS)soil around rubber products industrial parkpollutantbutyl xanthan acid
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