- P-ISSN 1225-0163
- E-ISSN 2288-8985
The determination of phthalates and adipate in natural mineral water and its container is described. Phthalates and adipate were extracted from natural mineral water by liquid-liquid extraction with methylene chloride, concentrated and then injected in GC-MS (SIM). Phthalates and adipate from 1) PET, cap, label and glue were extracted in Soxhlet with 50 mL of carbon tetrachloride, purified with silicagel and detected with GC-MS (SIM). Peak shapes and quantitation of phthalates and adipate were excellent, with linear calibration curves over a range of <TEX>$0.1{\sim}10{\mu}g/L$</TEX> in water sample (<TEX>$r^2$</TEX> > 0.996) and over a range of <TEX>$1{\sim}1,000{\mu}g/Kg$</TEX> in solid samples (<TEX>$r^2$</TEX>>0.994). The detection limits of analytes were <TEX>$0.002{\sim}0.010{\mu}g/L$</TEX> in water and <TEX>$0.01{\sim}0.02{\mu}g/Kg$</TEX> in solid samples. Five kinds of natural mineral water samples, two PETs, two labels, two caps and two glues were quantified by the described procedure. As a results, the concentrations of total phthalates in natural mineral water ranged from ND ~ 1.2 ng/mL. Otherwise, the concentrations of total phthalate extracted from PET ranged from 0.55 ~ 1.2 mg/Kg. We found that the accurate determination of phthalte and adipate in natural mineral water and container must be considered blank correction and the removal of label and glue in PET sample.