Document Detail


Estimation of the uncertainty associated with the standard addition methodology when a matrix effect is detected.
MedLine Citation:
PMID:  18970105     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
If a matrix effect is detected during the validation stage of an analytical method, the standard addition methodology must be applied. To reach a good estimation of the uncertainty associated with the determination, an adequate identification and evaluation of each uncertainty source should be done. As an example to illustrate how to calculate the uncertainty in this case, the simultaneous determination of V(V) and Mo(VI) at trace levels after precolumn chelation and extraction with N-benzoyl-N-phenylhydroxylamine, has been selected. The final results show that the main contributions to the relative overall uncertainty are those closely related with the chemical aspects of the method, i.e. liquid-liquid extraction and standard addition calibration.
Authors:
Gracia Bagur; Mercedes Sánchez-Viñas; Domingo Gázquez; Miguel Ortega; Roberto Romero
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Talanta     Volume:  66     ISSN:  1873-3573     ISO Abbreviation:  Talanta     Publication Date:  2005 Jun 
Date Detail:
Created Date:  2008-10-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2984816R     Medline TA:  Talanta     Country:  England    
Other Details:
Languages:  eng     Pagination:  1168-74     Citation Subset:  -    
Affiliation:
Department of Analytical Chemistry, Faculty of Sciences, University of Granada, E-18002 Granada, Spain.
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