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http://dx.doi.org/10.5668/JEHS.2012.38.6.561

Determination of 4 Parabens in Human Urine by Online SPE and LC-MS/MS Techniques  

Kim, Jung Hoan (Department of Food Technology & Service, Eulji University)
Kho, Young Lim (Department of Health, Environment & Safety, Eulji University)
Kim, Pan Gyi (Department of Occupational & Environmental Health, Yongin University)
Jeong, Jee Yeon (Department of Occupational & Environmental Health, Yongin University)
Lee, Eun Hee (Graduate School of Health Science, Far East University)
Lee, Seung-Youl (Health Effect Analysis Team, National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration)
Nam, Hye-Seon (Health Effect Analysis Team, National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration)
Rhee, Gyu-Seek (Health Effect Analysis Team, National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration)
Publication Information
Journal of Environmental Health Sciences / v.38, no.6, 2012 , pp. 561-567 More about this Journal
Abstract
Objectives: Parabens are widely used as antimicrobial agents in pharmaceuticals and cosmetics as well as by the food industry. Parabens have been reported to show weak estrogenic activity and be related to health effects such as allergic reactions and skin and breast cancer. We evaluated an online solid phase extraction (SPE) method coupled with LC-MS/MS technique using free and conjugated parent parabens in human urine for assessing human exposure to parabens. Methods: We employed LC/MS/MS through online solid phase extraction and column-switching techniques and analyzed free and conjugated parabens as biomarkers of human exposure. Four major parabens, methyl-paraben (MP), ethyl-paraben (EP), propyl-paraben (PP) and butyl-paraben (BP), were analyzed. Method validation was performed by sensitivity, accuracy, precision and comparison of the results of online SPE with offline SPE. Results: The limits of detection (LOD) were in the range of 0.2-2 ng/mL, and actual limits of quantification (LOQ) were in the range of 0.7-6 ng/mL urine, depending upon the compound. Accuracy was in the range of 98.3-106.4%, and precision was in the range of 1.3-8.7% (CV) depending upon the compound. We found a good correlation between the results of analysis by online SPE method and that by off-line SPE method. Conclusions: The online SPE method showed proper LOD and validated accuracy, precision and good correlation with the offline method for analyzing parabens in urine.
Keywords
parabens; online-SPE; LC-MS/MS; biomonitoring; urine;
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