GC-MS Determination of 16 Phthalate Esters in Water by Disc Membrane Extraction

A method of GC-MS for the determination of 16 phthalate esters (PAEs) in water was proposed. Water sample was enriched by self-made disc extraction device with no plastic-contacting experimental procedures. Experimental conditions, including the choice of disc membrane, pressure of membrane, kind and amount of eluent, were studied; and the working condition of the instrument, including the temperature of ion source, rate of temperature elevation, temperature at the inlet of sample injection, monitoring ions and gains at different time intervals, were discussed. Under the optimum conditions, linear relationships between values of peak area and mass concentration of the 16 PAEs were obtained in definite ranges, with detection limits (3S/N) in the range of 0.17-2.45 μg·L-1. Test for recovery was made by addition of standards of the 16 PAEs at 3 different concentration levels to blank water samples as matrixes, values of recovery found were in the range of 79.8% to 104%, with RSD′s (n=6) in the range of 1.1%-9.4%.