RESUMO
Objective To determine the migration of phthalates esters in disposable plastic cups by gas chromatography with mass spectrometry ( GC-MS ) , and to study the effect of materials , temperature and duration conditions on the concentration of phthalate esters in disposable plastic cups . Methods Simulants ( distilled water , 3% acetic acid aqueous solution , 10% ethanol aqueous solution and isooctane ) test samples were extracted with n-hexane and analyzed by GC-MS.The external standards were applied to the analysis and quantitation of phthalate esters . Results A good linear relationship was showed under the range of 0.01-10 μg/mL for 17 compounds of migration of phthalates esters withR 2≥0 .998 .The recovery rates were 71%-107% and the relative standard deviation were lower than 7%. The detection limit was 0 .86-14 .41 .The migration of phthalates esters were detected in ten brands of disposable plastic cups sold in Shanghai .Diisobutyl phthalate , dibutyl phthalate and dioctylphthalate were detected in ten brands of disposable plastic cups , but none of them were exceed the limits .Under the high temperature condition , the pdypropylene and polyethylene terephthalate material concentration of migration of phthalates esters in disposable plastic cups were with no obvious difference , but the polystyrene material concentration of migration of phthalates esters in disposable plastic cups were raised over time . Conclusion This method has good sensitivity , accuracy , repeatability and is suitable for the rapid analysis of the migration of phthalate esters in disposable plastic cups .