Abstract
Alkyl esters of p-hydroxybenzoic acid (parabens) are a family of compounds that have been in use since the 1920s as preservatives in cosmetic formulations, with one of the lowest rates of skin problems reported in dermatological patients. However, in the last few years, many scientific publications have demonstrated that parabens are weak endocrine disruptors, meaning that they can interfere with the function of endogenous hormones, increasing the risk of breast cancer. In the present work, a new sample treatment method is introduced based on dispersive liquid–liquid microextraction for the extraction of the most commonly used parabens (methyl-, ethyl-, propyl-, and butylparaben) from human serum samples followed by separation and quantification using ultrahigh performance liquid chromatography–tandem mass spectrometry. The method involves an enzymatic treatment to quantify the total content of parabens. The extraction parameters (solvent and disperser solvent, extractant and dispersant volume, pH of the sample, salt addition, and extraction time) were accurately optimized using multivariate optimization strategies. Ethylparaben ring 13C6-labeled was used as surrogate. Limits of quantification ranging from 0.2 to 0.7 ng mL−1 and an interday variability (evaluated as relative standard deviations) from 3.8 to 11.9 % were obtained. The method was validated using matrix-matched calibration standard and a spike recovery assay. Recovery rates for spiked samples ranged from 96 to 106 %, and a good linearity up to concentrations of 100 ng mL−1 was obtained. The method was satisfactorily applied for the determination of target compounds in human serum samples.
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References
Soni MG, Carabin IG, Burdock GA (2005) Safety assessment of esters of p-hydroxybenzoic acid (parabens). Food Chem Toxicol 43:985–1015
Andersen FA (2008) Final amended report on the safety assessment of methylparaben, ethylparaben, propylparaben, isopropylparaben, butylparaben, isobutylparaben, and benzylparaben as used in cosmetic products. Int J Toxicol 27:1–82
Regulation (EC) Nº 1223/2009 of the European Parliament and of the Council of the European Union on cosmetic products (2009) Sin título, es una directiva. Off J Eur Commun L 342:59–209
Fang H, Tong WD, Shi LM, Blair R, Perkins R, Branham W, Hass BS, Xie Q, Dial SL, Moland CL, Sheehan DM (2001) Structure-activity relationships for a large diverse set of natural, synthetic, and environmental estrogens. Chem Res Toxicol 14:280–294
Byford JR, Shaw LE, Drew MGB, Pope GS, Sauer MJ, Darbre PD (2002) Estrogenic activity of parabens in MCF7 human breast cancer cells. J Steroid Biochem 80:49–60
Darbre PD, Byford JR, Shaw LE, Hall S, Coldham NG, Pope GS, Sauer MJ (2003) Oestrogenic activity of benzylparaben. J Appl Toxicol 23:43–51
Darbre PD, Aljarrah A, Miller WR, Coldham NG, Sauer MJ, Pope GS (2004) Concentrations of parabens in human breast tumours. J Appl Toxicol 24:5–13
Darbre PD, Harvey PW (2008) Paraben esters: review of recent studies of endocrine toxicity, absorption, esterase and human exposure, and discussion of potential human health risks. J Appl Toxicol 28:561–578
Cashman AL, Warshaw EM (2005) Parabens: a review of epidemiology, structure, allergenicity, and hormonal properties. Dermatitis 16:57–66
Vo TT, Yoo YM, Choi KC, Jeung EB (2010) Potential estrogenic effect(s) of parabens at the prepubertal stage of a postnatal female rat model. Reprod Toxicol 29:306–316
Kang KS, Che JH, Ryu DY, Kim TW, Li GX, Lee YS (2002) Decreased sperm number and motile activity on the F1 offspring maternally exposed to butyl p-hydroxybenzoic acid (butyl paraben). J Vet Med Sci 64:227–235
Oishi S (2004) Lack of spermatotoxic effects of methyl and ethyl esters of p-hydroxybenzoic acid in rats. Food Chem Toxicol 42:1845–1849
Kjaerstad MB, Taxvig C, Andersen HR, Nellemann C (2010) Mixture effects of endocrine disrupting compounds in vitro. Int J Androl 33:425–433
El Hussein S, Muret P, Berard M, Makki S, Humbert P (2007) Assessment of principal parabens used in cosmetics after their passage through human epidermis-dermis layers (ex-vivo study). Exp Dermatol 16:830–836
Janjua NR, Mortensen GK, Andersson AM, Kongshoj B, Skakkebk NE, Wulf HC (2007) Systemic Uptake of Diethyl Phthalate, Dibutyl Phthalate, and Butyl Paraben Following Whole-Body Topical Application and Reproductive and Thyroid Hormone Levels in Humans. Environ Sci Technol 41:5564–5570
Calafat AM, Ye XY, Wong LY, Bishop AM, Needham LL (2010) Urinary concentrations of four parabens in the US population: NHANES 2005–2006. Environ Health Perspect 118:679–685
Sandanger TM, Huber S, Moe MK, Braathen T, Leknes H, Lund E (2011) Plasma concentrations of parabens in postmenopausal women and self-reported use of personal care products: the NOWAC postgenome study. J Expo Sci Env Epidemiol 21:595–600
Harville HM, Voorman R, Prusakiewicz JJ (2007) Comparison of paraben stability in human and rat skin. Drug Metab Lett 1:17–21
Jewell C, Ackermann C, Payne NA, Fate G, Voorman R, Williams FM (2007) Inter-individual variability in esterases in human liver. Drug Metab Dispos 35:2015–2022
Vokel W, Colnot T, Csanady GA, Filser JG, Dekant W (2002) Metabolism and kinetics of bisphenol A in humans at low doses following oral administration. Chem Res Toxicol 15:1281–1287
Ye X, Bishop AM, Reidy JA, Needham LL, Calafat AM (2006) Parabens as urinary biomarkers of exposure in humans. Environ Health Perspect 114:1843–1846
Rezaee M, Yamini Y, Moradi M, Saleh A, Faraji M, Naeeni MH (2010) Supercritical fluid extraction combined with dispersive liquid-liquid microextraction as a sensitive and efficient sample preparation method for determination of organic compounds in solid samples. J Supercrit Fluids 55:161–168
Li Y, Liu J (2010) Dispersive liquid-liquid microextraction based on ionic liquid in combination with high-performance liquid chromatography for the determination of bisphenol A in water. Int J Environ Anal Chem 90:880–890
Negreira N, Rodríguez I, Rubí E, Cela R (2010) Dispersive liquid-liquid microextraction followed by gas chromatography-mass spectrometry for the rapid and sensitive determination of UV filters in environmental water samples. Anal Bioanal Chem 398:995–1004
Ma J, Lu W, Chen L (2012) Recent advances in dispersive liquid-liquid microextraction for organic compounds analysis in environmental water: a review. Curr Anal Chem 8:78–80
Zgola-Grzeskowiak A, Grzeskowiak T (2011) Dispersive liquid-liquid microextraction. Trends Anal Chem 30:1382–1399
Farajzadeh MA, Djozan D, Bakhtiyari RF (2010) Use of a capillary tube for collecting an extraction solvent lighter than water after dispersive liquid-liquid microextraction and its application in the determination of parabens in different samples by gas chromatography-Flame ionization detection. Talanta 81:1360–1367
Cunha SC, Fernandes JO (2010) Quantification of free and total bisphenol A and bisphenol B in human urine by dispersive liquid-liquid microextraction (DLLME) and heart-cutting multidimensional gas chromatography-mass spectrometry (MD-GC/MS). Talanta 83:117–125
Cruz-Vera M, Lucena R, Cárdenas S, Valcárcel M (2009) One-step in-syringe ionic liquid-based dispersive liquid-liquid microextraction. J Chromatogr A 1216:6459–6465
Melwanki MB, Chen WS, Bai HY, Lin TY, Fuh MR (2009) Determination of 7-aminoflunitrazepam in urine by dispersive liquid-liquid microextraction with liquid chromatography-electrospray-tandem mass spectrometry. Talanta 78:618–622
Han Y, Jia X, Liu X, Duan T, Chen H (2010) DLLME Combined with GC-MS for the Determination of Methylparaben, Ethylparaben, Propylparaben and Butylparaben in Beverage Samples. Chromatographia 72:351–355
Jain R, Mudiam MKR, Chauhan A, Ch R, Murthy RC, Khan HA (2013) Simultaneous derivatisation and preconcentration of parabens in food and other matrices by isobutyl chloroformate and dispersive liquid-liquid microextraction followed by gas chromatographic analysis. Food Chem 141:436–443
Guidance for Industry. Bioanalytical Method Validation (2001) U.S. Department of Health and Human Services, Food and Drug Administration, Center for Drug Evaluation and Research (CDER), Center for Veterinary Medicine (CVM)
González-Casado A, Cuadros-Rodríguez L, Alonso-Hernández E, Vílchez JL (1996) Estimate of gas Chromatographic blanks application to detection limits evaluation as recommended by IUPAC. J Chromatogr A 726:133–139
Ye X, Tao L, Needham L, Calafat AM (2008) Automated on-line column-switching HPLC-MS/MS method for measuring environmental phenols and parabens in serum. Talanta 76:865–871
Acknowledgments
The study was supported by the Regional Government of Andalusia (Project of Excellence No. P09-CTS-4470). We are grateful to the staff of the Management Clinical Laboratory Unit of the San Agustín Hospital (Linares, Jaén, Spain) for its cooperation, especially to its head, Dr. Jorge Molina Santiago, and to University of Granada for the fellowship granted to F. Vela-Soria.
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Vela-Soria, F., Ballesteros, O., Rodríguez, I. et al. A new treatment by dispersive liquid–liquid microextraction for the determination of parabens in human serum samples. Anal Bioanal Chem 405, 7259–7267 (2013). https://doi.org/10.1007/s00216-013-7181-x
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DOI: https://doi.org/10.1007/s00216-013-7181-x