Abstract
The compounds, phthalate esters were wide spread in the world including air, soil and water. The endocrine potency of these compounds could generate adverse effects when people intake them from food, inhalation and skim absorption. In this study, solid-phase microextraction(SPME) coupled with GC-MS was evaluated to determine trace level of phthalate in urine and serum. The experimental procedures to extract phthalate esters in urines were optimized with a 65 ■m PDMS/DVB coated fiber, extraction at 30℃ for 100 min and desorption at 260℃ for 8 min. The limits of quantification of the method ranged between 0.01 and 813 ng/L. The liner correlation coefficients(r2) were between 0.9940 - 0.9998. The repeatability expressed as R.S.D. was in the range 0.09 - 12.25 % for the spiking level 50 ■g/L of each analyte. The experimental procedures to extract phthalate esters in serum were optimized with a 100 ■m PDMS coated fiber, extraction at 70℃ for 40 min and desorption at 260℃ for 4 min. The limits of quantification of the method ranged between 0.06 and 27 ■g/L. The liner correlation coefficients(r2) were between 0.9889 - 0.9996.The repeatability expressed as R.S.D. was in the range 0.21 - 6.55 % for the spiking level 200 ■g/L of each analyte. The feasibility of applying the method to determine phthalate esters in real samples was examined by analyzing human urine、human serum from 20-30 year-old suspects and newborn bovine serum which flow through blood bag. The results indicate DEHP could be flow into human body by blood transfusion.