Document Detail

Ultrasound-assisted magnetic SPE based on Fe3 O4 -grafted graphene for the determination of polychlorinated biphenyls in water samples.
MedLine Citation:
PMID:  24030865     Owner:  NLM     Status:  Publisher    
An ultrasound-assisted magnetic solid-phase extraction procedure with an Fe3 O4 -grafted graphene nanocomposite as the magnetic adsorbent has been developed to determinate seven polychlorinated biphenyls (PCBs; PCB28, PCB52, PCB101, PCB118, PCB138, PCB153, and PCB180) simultaneously in 200 mL environmental water samples, in combination with GC-MS/MS. Several factors related to magnetic solid-phase extraction efficiencies, such as the superparamagnetic intensity and amount of adsorbent, extraction time, sample pH, and desorption conditions were investigated. With the assistance of ultrasound, the extraction achieved the maximum within only 20 s, attributed to the powerful adsorptive ability of the magnetic absorbent towards the PCBs. Under the optimized conditions, an excellent linearity was observed in the range of 0.1-100 ng/L for PCB28, 0.2-100 ng/L for PCB52, and 0.5-100 ng/L for the other five PCBs with the correlation coefficients ranging from 0.9988 to 0.9996. The mean recoveries at spiked levels of 5.0 and 10.0 ng/L were 84.9-108.5%, the coefficients of variations were less than 6.5%. With convenient magnetic separation, the synthesized magnetic adsorbent could be recycled more than ten times. The proposed method was demonstrated to be feasible, simple, rapid, and easy to operate for the trace analysis of the PCBs in environmental water samples. This article is protected by copyright. All rights reserved.
Xiaoji Cao; Jiaoyu Chen; Xuemin Ye; Feifei Zhang; Lingxiao Shen; Weimin Mo
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-9-9
Journal Detail:
Title:  Journal of separation science     Volume:  -     ISSN:  1615-9314     ISO Abbreviation:  J Sep Sci     Publication Date:  2013 Sep 
Date Detail:
Created Date:  2013-9-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088554     Medline TA:  J Sep Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
This article is protected by copyright. All rights reserved.
Research Center of Analysis and Measurement, Zhejiang University of Technology, 18 Chaowang Rd, Hangzhou, Zhejiang, 310014, P.R. China.
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