Abstract:

To provide reference for determining the residues of phthalate esters in soil and solids, we used the gas chromatography-tandem mass spectrometry (GC-MS/MS) to build the purified determination method of 6 phthalate esters in soil. The extract was determined for phthalate esters by acetone and n-hexane (1:1,V:V), PSA/Silica composite packing glass column, purification, drying and concentrating, and analyzed by GC-MS/MS with ASE, and external standard method was applied to quantitative analysis. The results of the 6 phthalate esters showed good linearity, with correlation coefficients (R) of 0.9968-0.9995. The recoveries of the 6 phthalate esters were 84.6%-98.3%, the detection limit of the method was 0.2-0.8 μg/kg, and the relative standard deviation (n=6) was 2.7%-12%. This method is accurate, stable, simple, efficient and convenient, and it could save the cost and meet the test requirements of phthalate esters in soil.

Key words: accelerated solvent extraction (ASE), GC-MS/MS, phthalate esters, soil, residue