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Flow injection kinetic spectrophotometric determination of trace amounts of Se(IV) in seawater.
MedLine Citation:
PMID:  18970085     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
A simple, accurate, sensitive and selective flow injection catalytic kinetic spectrophotometric method for rapid determination of trace amounts of selenium is proposed in this paper. The proposed method is based on the accelerating effect of Se(IV) on the reaction of ethexlenediamine tetrecetic acid disodium salt (EDTA) and sodium nitrate with ammonium iron(II) sulfate hexahydrate in acidic media. The absorbance intensity was registered in this reaction solution at 440nm. The calibration graph is linear in the range of 5x10(-9)-2x10(-7) and 2x10(-7)-2x10(-6)gml(-1). The detection limit is 2x10(-9)gml(-1). The relative standard deviation was 3.4% for 5x10(-8)gml(-1) Se(IV) (n=11), 2.7% for 5x10(-7)gml(-1) Se(IV) (n=11). This method is very simple, rapid and suitable for automatic and continuous analysis. The presented system has been applied successfully to determination of Se(IV) of seawater samples.
Authors:
Gong Zhengjun; Zhang Xinshen; Chen Guohe; Xiao Xinfeng
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Talanta     Volume:  66     ISSN:  1873-3573     ISO Abbreviation:  Talanta     Publication Date:  2005 May 
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:  1012-7     Citation Subset:  -    
Affiliation:
Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Sichuan 610065, Chengdu, PR China; School of Environmental Science and Engineering, Southwest Jiaotong University, Sichuan 610031, Chengdu, PR China.
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