title: Development and characterization of a nanodendritic silver-based solid-phase extraction sorbent for selective enrichment of endocrine-disrupting chemicals in water and milk samples.
abstract: In this study, 4-[4-phenylazo-phenoxy] butyl-1-thiol (AzSH) functionalized nanodendritic silver (AzS@AgNDs) materials were prepared as a solid-phase extraction (SPE) sorbent for the selective extraction of estrogens. AzS@AgNDs possess an extremely large surface-to-volume ratio and a small average particle size. The performance of the material was evaluated by selective enrichment of hexestrol, diethylstilbestrol, dienestrol and bisphenol A in water and milk samples followed by rapid ultra-performance liquid chromatography-electrospray ionization mass spectrometry (UPLC-ESI-MS) analyses. The results exhibited that AzS@AgNDs had excellent adsorption capability for the targeted estrogens. The limits of detection of the four estrogens ranged from 0.1 to 5.0 pg/mL. The recoveries of the estrogens spiked into tap water were over the range of 83.6-105.3% with relative standard deviations of 2.8-6.0%. The results indicated the capability of this method for the rapid determination of estrogens in milk and other environmental water samples. In addition, this method would be useful for the determination of human exposure and health risk assessments trace level of endocrine-disrupting compounds (EDCs) in drinking water.
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Yuanji
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Bing
authors.initials: B
authors.lastname: Xia
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Baocheng
authors.initials: B
authors.lastname: Ji
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Fengwei
authors.initials: F
authors.lastname: Ma
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Lisheng
authors.initials: L
authors.lastname: Ding
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
authors.forename: Bangjing
authors.initials: B
authors.lastname: Li
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China. Electronic address: zhouyan@cib.ac.cn.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhou
mesh_terms: D000818:Animals; D052244:Endocrine Disruptors / Q000032:analysis*; D057230:Limit of Detection; D046529:Microscopy, Electron, Transmission; D008892:Milk / Q000737:chemistry*; D049329:Nanostructures; D012834:Silver / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000295:instrumentation*; D014873:Water Pollutants / Q000032:analysis*
chemical_list: D052244:Endocrine Disruptors; D014873:Water Pollutants; D012834:Silver
keywords: Estrogens; Nanodendritic silver; Sample preparation; Solid-phase extraction