Method for determining phthalate ester in soil
A medium phthalate and soil technology, applied in the field of trace pollutant analysis in the environment, can solve problems such as low resolution and overlapping retention times of isomer groups, achieve high sensitivity, reduce matrix interference, and reduce the possibility of Effect
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[0027] The invention uses dichloromethane as the extracting liquid, extracts by ultrasonic extraction, concentrates by nitrogen blowing, and finally analyzes and measures by gas chromatography tandem mass spectrometry (GC / MS), so as to accurately and quickly analyze the phthalate in soil.
[0028] 84 agricultural soils of 21 different land use types in Tianjin were selected as the analysis objects. The analysis methods and results are as follows:
[0029] Extraction process: Take a certain amount of naturally air-dried soil in an Erlenmeyer flask, add 15mL of dichloromethane according to the optimized conditions, ultrasonically extract for 5 minutes, collect the extract after filtering, and repeat the above steps twice;
[0030] Concentration process: blow off the dichloromethane solvent from the combined extract with nitrogen, blow to 5mL, transfer to the concentrator tube and continue to blow to below 2mL, add internal standard, and dichloromethane to volume;
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