Document Detail

Ferric nanoparticle-based resonance light scattering determination of DNA at nanogram levels.
MedLine Citation:
PMID:  19071519     Owner:  NLM     Status:  In-Data-Review    
A novel assay of DNA has been proposed by using ferric nanoparticles as probes coupled with resonance light scattering (RLS) detection. At pH 7.40, the RLS intensity of ferric nanoparticles can be greatly enhanced by the aggregation of positively charged ferric nanoparticles through electrostatic interaction with negatively charged DNA. The enhanced intensity of RLS at 452nm is proportional to the concentration of DNA in the range of 0.01-0.8mugml(-1) for calf thymus and salmon sperm DNA and in the range of 0.005-0.3mugml(-1) for E. coli K12 genomic DNA. Detection limits are 3.6ngml(-1) for calf thymus DNA, 4.4ngml(-1) for salmon sperm DNA, and 1.9ngml(-1) for E. coli K12 genomic DNA, respectively. Compared with the chromophores previously used in RLS assay, the ferric nanoparticles have offered several advantages in easy preparation, good photostability and high sensitivity without being modified or functionalized.
Yongqiang Cheng; Zhengping Li; Yuqin Su; Yongshan Fan
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Publication Detail:
Type:  Journal Article     Date:  2006-09-08
Journal Detail:
Title:  Talanta     Volume:  71     ISSN:  1873-3573     ISO Abbreviation:  Talanta     Publication Date:  2007 Mar 
Date Detail:
Created Date:  2008-12-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2984816R     Medline TA:  Talanta     Country:  England    
Other Details:
Languages:  eng     Pagination:  1757-61     Citation Subset:  -    
College of Chemistry and Environment Science, Hebei University, Baoding 071002, PR China.
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