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1

Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei 112, Taiwan

2

School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan

3

Department of Education and Research, Taipei City Hospital, Taipei 106, Taiwan





*

Author to whom correspondence should be addressed.



Abstract Dibutyl phthalate DBP is commonly used to increase the flexibility of plastics in industrial products. However, several plasticizers have been illegally used as clouding agents to increase dispersion of aqueous matrix in beverages. This study thus develops a rapid and validated analytical method by ultra-performance liquid chromatography with tandem mass spectrometry UPLC-MS-MS for the evaluation of pharmacokinetics of DBP in free moving rats. The UPLC-MS-MS system equipped with positive electrospray ionization ESI source in multiple reaction monitoring MRM mode was used to monitor m-z 279.25→148.93 transitions for DBP. The limit of quantification for DBP in rat plasma and feces was 0.05 µg-mL and 0.125 µg-g, respectively. The pharmacokinetic results demonstrate that DBP appeared to have a two-compartment model in the rats; the area under concentration versus time AUC was 57.8 ± 5.93 min μg-mL and the distribution and elimination half-life t1-2,α and t1-2,β were 5.77 ± 1.14 and 217 ± 131 min, respectively, after DBP administration 30 mg-kg, i.v

About 0.18% of the administered dose was recovered from the feces within 48 h. The pharmacokinetic behavior demonstrated that DBP was quickly degraded within 2 h, suggesting a rapid metabolism low fecal cumulative excretion in the rat. View Full-Text

Keywords: dibutyl phthalate DBP; liquid chromatography with tandem mass spectrometry LC-MS-MS; pharmacokinetics; plasticizer dibutyl phthalate DBP; liquid chromatography with tandem mass spectrometry LC-MS-MS; pharmacokinetics; plasticizer





Autor: Li-Wen Chang 1, Mei-Ling Hou 1 and Tung-Hu Tsai 1,2,3,*

Fuente: http://mdpi.com/



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