Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Editor

Personal info

View

About

Terms

Javascript disabled

Please enable Javascript support in your browser to use this application.

Instructions on how to enable JavaScript on different browsers can be found here: http://www.google.com/support/bin/answer.py?answer=23852.

[edit this page]

Jen, J.F. et al.

Jen, Liu,

Determination of phthalate esters from food-contacted materials by on-line microdialysis and liquid chromatography.

Phthalates (endocrine disrupters) released from food-contacted plastics into aqueous solution during microwave conditioning were measured with microdialysis enrichment on-lined high-performance liquid chromatography. The released phthalates in aqueous solution were diffused through a cellular dialysis membrane into the perfusion stream and thus enriched prior to HPLC analysis. Conditions for obtaining optimum enrichment such as the hollow dialysis fiber, flow-rate and polarity modifier in perfusion stream, pH, added-salt and stirring rate in sample solution, as well as chromatographic conditions were investigated. Experimental results indicated that microdialysis enrichment with a 20-cm polysulfone hollow dialysis fiber and heptane as the perfusate at 0.10-muL/min flow-rate to collect phthalates from aqueous sample in 0.5M KCl matrix (optional pH) at 250rpm stirring offered the optimum enriched efficiency. The dimethyl phthalate (DMP), diethyl phthalate (DEP) and dibutyl phthalate (DBP) were well separated within 16min by a C-18 column and eluted gradient from 40 to 90% aqueous acetonitrile (at pH 6.0) and 1.0 to 1.5mL/min flow-rate. Detection was carried out with an UV detector at 225nm. The enrichment factors were 14, 140 and 201 (at 0.10-muL/min perfusate flow-rate) for DMP, DEP and DBP, respectively, with less than 4% RSD. The proposed method provided a very simple, fast and eco-friendly enriched procedure to determine the extent of phthalates migration from disposable plastic materials into drinking soup.[1]

References

Determination of phthalate esters from food-contacted materials by on-line microdialysis and liquid chromatography. Jen, J.F., Liu, T.C. Journal of chromatography. A. (2006) [Pubmed]

Annotations and hyperlinks in this abstract are from individual authors of WikiGenes or automatically generated by the WikiGenes Data Mining Engine. The abstract is from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.About WikiGenes Open Access Licence Privacy Policy Terms of Use apsburg

The world's first wiki where authorship really matters (Nature Genetics, 2008). Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. Search thousands of articles and collaborate with scientists around the globe.